Recently, in order to accurately determine and timely eliminate the hidden dangers of major accidents in industrial and trade enterprises, according to laws and administrative regulations such as the Safety Production Law, and in light of the lessons learned from typical accidents in industrial and trade enterprises in recent years, the Ministry of Emergency Management has formulated and issued the Criteria for Determining the Hidden Dangers of Major Accidents in Industrial and Trade Enterprises (Decree No.10 of the Ministry of Emergency Management, hereinafter). It lists 64 situations that should be judged as hidden dangers of major accidents. In order to further clarify the specific judgment situation, facilitate the application of emergency management departments at all levels and industrial and trade enterprises, and standardize the effective implementation of the Judgment Criteria, the meaning of the key clauses in the Judgment Criteria is explained. Article
6 If a building materials enterprise has any of the following circumstances, it shall be judged as a hidden danger of a major accident:
(1) The bag dust collector of the coal mill and the pulverized coal bunker are not equipped with temperature and fixed carbon monoxide concentration monitoring and alarm devices, or are not equipped with gas fire extinguishing devices.
[Interpretation]
Judgment situation:
(1) The ash hopper or air inlet and outlet of the coal mill bag dust collector are not equipped with temperature monitoring and alarm devices.
(2) The cone of the pulverized coal bunker is not provided with a temperature monitoring and alarm device.
(3) There is no fixed carbon monoxide concentration monitoring and alarm device at the air outlet of the bag dust collector of the coal mill.
(4) The pulverized coal bunker is not equipped with a fixed carbon monoxide concentration monitoring and alarm device.
(5) The coal mill bag dust collector or pulverized coal bunker is not equipped with gas fire extinguishing device, or the gas fire extinguishing device is not equipped with automatic control, manual control and mechanical emergency operation at the same time.
(2) The manual clearing operation of the cylindrical storage has not implemented the safety measures to prevent falling from high places and collapse in the clearing plan.
[Interpretation]
Judgment situation:
(1) The manual clearing operation of the cylindrical storage has not formulated the clearing plan.
(2) The manual cleaning scheme of the cylindrical storage lacks safety measures to prevent accidents such as falling from high places, collapse, burial and suffocation.
(3) Safety measures to prevent accidents such as falling, collapse, burial and suffocation are not implemented during manual cleaning of cylindrical storage.
(3) The cylindrical storage of carbide slag raw materials in cement enterprises is not equipped with a fixed combustible gas concentration monitoring and alarm device, or the monitoring and alarm device is not interlocked with the accident ventilation device.
[Interpretation]
Judgment:
(1) There is no fixed combustible gas concentration monitoring and alarm device capable of monitoring the concentration of acetylene gas at the top of the carbide slag raw material silo of the cement enterprise.
(2) There is no emergency ventilation device in the carbide slag raw material silo of cement enterprises.
(3) The fixed combustible gas monitoring and alarm device of the carbide slag raw material silo in the cement enterprise is not interlocked with the emergency ventilation device.
(4) Before entering cylindrical storage, roasting kiln, preheater cyclone, decomposition furnace, shaft furnace, grate cooler, mill and crusher, no quarantine measures have been taken for equipment that may be accidentally started and materials, high-temperature gases, toxic and harmful gases that may be poured in, or no safety measures have been taken to prevent falling and collapse from high places.
[Interpretation]
Judgment:
(1) When working in the cylindrical storage, grate cooler, mill and crusher, the power supply of the equipment is not cut off in the power distribution room and the equipment is locked and tagged.
(2) When entering the cylindrical storage, roasting kiln, preheater cyclone, decomposition furnace, shaft furnace, grate cooler, mill and other operations, the valves and flashboards to prevent the influx of materials, high temperature or toxic and harmful gases are not closed, and the power is cut off, locked and tagged.
(3) When working in the cylindrical storage, roasting kiln, preheater cyclone, decomposition furnace, shaft furnace and grate cooler, no measures are taken to prevent the materials above the working surface from collapsing and injuring people, or no measures are taken to prevent falling from high places.
(5) The gas mains of gas kilns using premixed combustion (except thermal generators and gas kilns) are not equipped with pipeline pressure monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with emergency automatic cut-off devices.
[Interpretation]
1.2.
(2) There is no emergency automatic shut-off valve on the gas header of the gas kiln with premixed and partially premixed combustion mode.
(3) The emergency automatic shut-off valve of the gas main pipe of the gas kiln adopting the premixed and partially premixed combustion mode is not interlocked with the pressure monitoring and alarm device.
3.
(6) There are no fixed combustible gas concentration monitoring and alarm devices in hydrogen production stations, nitrogen and hydrogen protective gas distribution rooms, gas distribution rooms and other three types of places.
[Interpretation]
Judgment:
(1) The hydrogen generation station and the nitrogen and hydrogen protective gas distribution room are not equipped with a fixed combustible gas concentration monitoring and alarm device capable of monitoring the hydrogen concentration.
(2) There is no fixed combustible gas concentration monitoring and alarm device in the gas distribution room.
(7) Failure of the water cooling equipment of the electric furnace for electric melting products.
[Interpretation]
Judgment situation:
the water cooling equipment of the electric furnace for electric melting products is leaking.
(8) Glass kilns, glass tin baths and other equipment are not equipped with monitoring and alarm devices for water-cooled and air-cooled protection systems.
[Interpretation]
Judgment:
(1) The water inlet header of the water cooling equipment of the glass furnace and glass tin bath is not equipped with a water flow monitoring alarm device, nor is it equipped with a pressure monitoring alarm device.
(2) The water cooling equipment such as the front face water bag of the glass furnace, the tin liquid cooling water bag of the glass tin bath and the lip brick water bag are not equipped with the water outlet temperature monitoring alarm.
(3) Air cooling protection equipment such as tank wall fan of glass furnace, steel slag fan, L hanging wall fan and bottom fan of glass tin bath is not equipped with shutdown alarm device.
The following is the full text of the Interpretation of the Standards for Determining the Hidden Dangers of Major Accidents in Industrial and Trade Enterprises:
Article 1 In order to accurately determine and timely eliminate the hidden dangers of major accidents in industrial and trade enterprises (hereinafter referred to as the hidden dangers of major accidents), this standard is formulated in accordance with the Production Safety Law of the People's Republic of China and other laws and administrative regulations. Article
2 This Standard is applicable to the determination of hidden dangers of major accidents in metallurgical, non-ferrous, building materials, machinery, light industry, textile, tobacco, trade and other industrial and trade enterprises. Where there are other provisions on the determination of major accident hidden dangers involving dangerous chemicals, fire control (fire), gas and special equipment in industrial and trade enterprises, such provisions shall apply.
[Interpretation]
(1) The criteria for determining the hidden dangers of "management" major accidents in Article 3 of the Criteria are applicable to all relevant industrial and trade enterprises; Article 4 to Article 10 The criteria for determining the hidden dangers of major accidents in "industries" are applicable to industrial and trade enterprises in seven industries, namely, metallurgy, non-ferrous metals, building materials, machinery, light industry, textile and tobacco; The criteria for determining the hidden dangers of major accidents in the "special category" from Article 11 to Article 13 are applicable to the relevant industrial and trade enterprises in three areas, namely, the risk of dust explosion, the use of liquid ammonia for refrigeration, and the limited space operation with the risk of poisoning such as hydrogen sulfide and carbon monoxide.
(2) If there are ironmaking blast furnaces, steelmaking converters of more than 30 tons, steelmaking electric arc furnaces and molten steel refining furnaces in industrial and trade enterprises other than metallurgy and non-ferrous metals, the relevant requirements shall be implemented in accordance with Items (1), (2), (4), (5), (6), (7) and (8) of Article 4 for metallurgical enterprises.
(3) If there is deep well casting technology in industrial and trade enterprises other than non-ferrous metals, the relevant requirements shall be implemented in accordance with Items (3), (6), (7), (8), (9) and (10) of Article 5 for non-ferrous enterprises. If an
industrial and trade enterprise has any of the following circumstances, it shall be judged as a hidden danger of a major accident:
(1) Failing to uniformly coordinate and manage the work safety of the contracting unit or the leasing unit, or failing to conduct regular safety inspections.
[Interpretation]
Judgment:
(1) Where a production and operation project or site is contracted or leased to other units, the enterprise has not signed a special safety production management agreement with the contractor or lessee, or has not stipulated their respective safety production management responsibilities in the contract or lease contract.
(2) Where a production and business operation project or site is contracted or leased to other units, the enterprise shall be exempted from or transferred to the obligation of unified coordination and management of production safety in the production safety management agreement, contract or lease signed by the enterprise with the contractor or lessee.
(3) Where a production and operation project or site is contracted or leased to other units, the enterprise fails to conduct regular safety inspections on the contractor or lessee in accordance with the requirements of the safety production rules and regulations or agreements or contracts, or fails to supervise and rectify the safety problems found.
(2) Special operation personnel fail to receive special safety operation training and obtain corresponding qualifications in accordance with regulations and take up their posts.
[Interpretation]
Judgment situation:
(1) The enterprise uses the special operation personnel who have not obtained the corresponding special operation certificate to work.
(2) Enterprises use special operators who forge special operation certificates to work.
(3) The enterprise uses the special operation personnel whose special operation certificate has expired or has not been reexamined.
(3) The principal person in charge of a metal smelting enterprise and the safety production management personnel fail to pass the examination in accordance with the regulations.
[Interpretation]
Judgment:
the main person in charge of the metal smelting enterprise and the safety production management personnel have not passed the examination of the corresponding emergency management department after 6 months from the date of taking office. Article
4 If a metallurgical enterprise is under any of the following circumstances, It shall be determined as a major accident hidden danger:
(1) The meeting room, activity room, rest room, operation room, shift room, dressing room (including bathhouse) and other six types of places where people gather, as well as the cold (hot) repair station of the molten iron tank is set in the floor area of the molten iron, molten steel and liquid slag lifting span.
[Interpretation]
1. The transverse direction refers to the traveling direction of the trolley of the molten metal crane; the longitudinal direction refers to the traveling direction of the cart of the molten metal crane (Figure 4-1).
The "zero-meter ground area in the workshop" does not include the sheltered area directly below the platform of the overhead floor, such as the running area of the molten steel tanker and slag tanker under the converter.
(2) "Operation room" includes control room, inspection room and laboratory (the same below for metallurgical enterprises). 2.
Note: "Floor area directly below" refers to the workshop floor area horizontally bounded by the column sideline of the column on both sides of the lifting span near the molten metal lifting side, and vertically bounded by the limit boundary of the molten iron, molten steel and liquid slag lifting process at the two ends of the lifting span (Fig. 4-2).
"Lifting process limit boundary" refers to the vertical boundary position (the same below for metallurgical enterprises) reached by lifting the outer wall of the ladle (ladle, basin) longitudinally near the two ends when the hot metal ladle, molten steel ladle, liquid slag ladle (ladle, basin) is located at the loading position, pouring position, ladle turret, casting position or the limit lifting point of the ground track due to the needs of the production process. The outer wall of the slag ladle (ladle, basin)
of steelmaking and continuous casting when it is located at the lifting point is not regarded as the limit boundary of the molten metal lifting process.
(4) For the operation room of AOD furnace, VD furnace and VOD furnace on the overhead platform of the steelmaking plant, the external wall facing the molten iron and molten steel lifting side is not completely enclosed by the solid wall, and within the side line of the column near the molten metal lifting side of the molten iron and molten steel tank lifting span.
(5) The continuous casting process of the steelmaking plant adopts the continuous casting platform operation room with the horizontal continuous casting car of the molten steel tank or the single-span arrangement of the ladle turret, which faces the outer wall of the molten steel and the liquid slag lifting side which is not completely enclosed by the solid wall, and is within the side line of the column of the continuous casting platform close to the molten metal lifting side.
Note: The lifting side facing molten steel and liquid slag includes two directions: facing the continuous casting span and facing the traveling route of the molten steel tank.
(6) When the cold (hot) repair station of the steel ladle and the cold repair station of the hot metal ladle of the steelmaking plant are set in the floor area right below the lifting and walking area of the molten iron, molten steel and liquid slag, or at the longitudinal ends of the lifting span, the safety protection requirements are not met.
Note: "Safety protection requirements" means that the distance between the outer wall of the tank body of the cold (hot) repair station of the molten steel tank and the cold repair station of the hot metal tank (near the limit boundary of the tank body lifting process) and the limit boundary of the molten metal lifting process is greater than or equal to 15m; A solid wall (Figure 4-4) with a height of more than or equal to 2 meters and a width of more than 1 meter beyond the hot repair operation station shall also be set at the hot repair station of the molten steel tank close to the lifting side of the molten metal; the distance between the solid wall and the lifting process limit boundary shall be more than or equal to 13 meters.
1.
(2) Steelmaking slag during production There is ponding in the working platform in front of the molten iron pretreatment, converter, electric arc furnace, induction furnace, refining furnace, continuous casting and submerged arc furnace, as well as the accident pit and slag pit under the furnace, as well as the molten metal lifting channel in the plant and the ground transportation channel in the plant.
(3) During the production period, there is water in the casting pit of the steel ingot and in the track area of the casting car.
2.
(2) During the production period, the steelmaking slag span, the molten iron pretreatment, the converter, the electric arc furnace, the induction furnace, the refining furnace, the continuous casting, the working platform in front of the submerged arc furnace, the accident pit under the furnace, the slag pit, the molten metal lifting channel in the plant and the ground transportation channel in the plant are wet.
(3) During the production period, the accumulated water in the drainage ditch (groove) used to collect (discharge) water leakage due to maintenance and equipment failure and process cooling water shall be kept in a flowing state.
(4) During the production period, the accumulated water in the drainage ditch (well) of the steel-making slag crossing the slag and the hot slag splashing under the electric arc furnace shall be kept in a flowing state.
(3) The steelmaking and continuous casting process is not provided with an accident ladle, a tundish breakout pit (trough), a tundish overflow pit (trough), or a breakout rotary chute, or the die casting process is not provided with an accident ladle (pit, trough).
[Interpretation]
1.
(2) Breakout rotary chute is not set or maintained as required.
Note: The setting requirements of the rotary chute include that the chute body shall be welded with steel plates, the interior shall be built with refractory bricks or refractory materials, one end of the chute shall extend to the top of the accident molten steel tank, and the other end shall be as close as possible to one side of the intermediate tank car body without affecting the normal running of the intermediate tank car, and the end shall be closed; the maintenance requirements include that the interior shall be free of blockage and ponding. The continuous casting machine is provided with a single-side breakout rotary chute.
(3) The emergency storage capacity of the breakout pit (groove) of the tundish is less than full capacity of the tundish.
(4) There is no emergency molten steel tank (groove, pit) in the ingot casting process.
Note: Ingot casting pit shall not be used as accident pit.
(5) The emergency storage capacity of the continuous casting accident ladle or the ingot casting accident ladle (pit, trough) is less than full capacity of the ladle.
2.
(2) In the continuous casting process using the horizontal continuous casting car of the molten steel tank, the accident molten steel tank is arranged on the zero meter ground in the workshop below the continuous casting platform.
(4) The water-cooled elements of steelmaking furnaces such as converter, electric arc furnace, AOD furnace, LF furnace, RH furnace and VOD furnace are not equipped with monitoring and alarm devices for outlet water temperature and flow difference between inlet and outlet water, or the monitoring and alarm devices are not interlocked with the tilting of furnace body, automatic lifting of oxygen (auxiliary) gun, automatic power-off of electrode and lifting device.
[Interpretation]
1.
(2) The water-cooled ladle cover of LF furnace, the water-cooled furnace wall of electric arc furnace, the water-cooled furnace cover, the water-cooled oxygen top gun, the water-cooled parts of the shaft, and the trolley water jacket connected to the Consteel furnace are not equipped with the monitoring and alarm device for the difference between the outlet water temperature and the inlet and outlet water flow. Or the alarm device is not interlocked with the automatic de-energizing and lifting of the electrode.
(3) The monitoring and alarm device for the difference between the outlet water temperature and the inlet and outlet water flow of the water-cooled oxygen top lance of the electric arc furnace is not interlocked with the automatic lifting of the top lance and the stop of oxygen supply.
(4) The water-cooled oxygen lance of VOD, CAS-OB, IR-UT, RH-KTB and other refining furnaces is not equipped with the monitoring and alarm device for the flow difference between inlet and outlet water, or the alarm device is not interlocked with the automatic lifting of the oxygen lance and the stop of oxygen supply.
2.
(5) During the production of the blast furnace, the set value of the working pressure at the top of the furnace exceeds the maximum working pressure specified in the design documents, or the monitoring device for the working pressure at the top of the furnace is not interlocked with the relief valve at the top of the furnace, or the set value of the interlocked relief pressure at the relief valve at the top of the furnace exceeds the design pressure value of the equipment.
[Interpretation]
1.2.
(2) During production, the furnace top relief valve is not interlocked with the furnace top working pressure.
(3) During production, the set value of the interlock relief pressure of the furnace top relief valve exceeds the design pressure value of the equipment.
(4) The cover of the blow-off valve at the top of the furnace shall be fastened and fixed.
3.
(6) Meeting rooms, activity rooms, rest rooms, operation rooms, handover rooms, dressing rooms and other six types of personnel gathering places near gas production, recovery and purification, pressurized mixing, storage and use facilities. Fixed carbon monoxide concentration monitoring and alarm devices are not installed in the places and locations where gas leakage and accumulation may occur, or the monitoring data are not connected to the places where people are on duty for 24 hours.
[Interpretation]
1.
(2) "Places and locations where gas leakage and accumulation may occur" refer to coke oven basement, heating furnace basement, annealing furnace basement, gas cabinet inlet and outlet pipeline basement, gas cabinet piston upper part, pressurized machine room, exhaust machine room, drainer room, Roaster, preheater, blast furnace tuyere and each layer platform above it (except each layer platform above furnace top large square hole), blast furnace top hydraulic station (including closed oil pump room and closed tool room), hot blast stove gas automatic shut-off valve operation platform, coal injection drying furnace, pulverized coal preparation room, gas power generation facility room (including TRT turbine sound insulation cover), gas dust remover ash unloading platform, Platforms above the mouth of the converter, the water seal pool of the vacuum refining device, the mechanical vacuum pump room, the gas heating furnace, the gas preheating furnace, the gas heat treatment furnace, the sintering pellet main exhaust fan room, the sintering ignition furnace, the pellet shaft furnace (rotary kiln) igniter, and the lime shaft kiln (rotary kiln) igniter.
2.
Note: This item does not apply to the 6 types of personnel gathering places set up beside the gas transmission and distribution pipeline in the plant area.
(2) Fixed carbon monoxide concentration monitoring and alarm devices are not installed in places and locations where gas leakage and accumulation may occur.
(3) The real-time data of the fixed carbon monoxide concentration monitoring and alarm device set up in the 6 types of places where people gather and where gas leakage and accumulation may occur are not connected to the places where people are on duty for 24 hours.
3.
(2) This judgment (1) When unattended operation is adopted at the specified facility site, the conference room, activity room, rest room, operation room, shift room and dressing room in the unattended area are not equipped with fixed carbon monoxide concentration monitoring and alarm devices.
(3) The real-time data of the alarm device in the 24-hour manned operation room of the gas production, recovery and purification, pressurized mixing, storage and use facilities is not connected to the 24-hour manned place.
(7) Heating furnaces, gas cabinets, dust collectors, pressurizers, roasters and other facilities, as well as gas pipelines before entering the workshop, are not equipped with partition devices.
[Interpretation]
1. Devices with this function can be independent or combined. The independent partition device includes totally enclosed glasses valve, valve cavity water injection type double gate shut-off valve and valve cavity water injection type NK valve; the combined partition device is composed of butterfly valve, gate valve, ball valve and other shut-off devices, glasses valve, blind plate, U/V water seal, etc.
2.Note
: When the combined partition device of cut-off device and blind plate is used, the support iron shall be set at the blind plate. The gas purification system of
blast furnace and converter involves the inlet and outlet gas pipelines of gravity dust collector, cyclone dust collector, cooler, spray tower, washing tower, annular gap cleaning tower, Venturi tube and dehydrator, which are not equipped with partition devices according to the process characteristics.
(2) The inlet gas pipeline before entering the workshop is not provided with a partition device.
3.
(2) When the gas pipeline with a diameter less than 100 mm adopts the combined partition device of cut-off device and blind plate, the supporting iron is not set at the blind plate.
(8) The maximum sealing gas pressure of the water-sealed drainer of the positive pressure gas transmission and distribution pipeline is less than 30 kPa, or the two sides of the partition device of the same gas pipeline share a drainer, or the drainage pipes above the drainers of different gas pipelines are connected, or the gas pipelines of different media share a drainer.
[Interpretation]
1. According to the different structure of the drainer body, it can be divided into vertical water-sealed drainer and horizontal water-sealed drainer.
(2) "Maximum sealing gas pressure" refers to the maximum pressure that can seal the gas in the pipeline determined by the structure of the water-sealed drainer itself, which is generally expressed by kPa (international unit) or mmH2O (water column height).
2.
(2) Both sides of the partition device of the same gas transmission and distribution pipeline share a drainer.
And (3) that drain pipe at the upper parts of the drainer of the different gas pipelines are communicated.
(4) Gas pipelines with different media share one drainer.
3.
(2) The positive and negative pressure working condition drain pipes on both sides of the partition device of the inlet and outlet pipeline of the gas extractor share water to seal the well (tank). Article
5 If a nonferrous enterprise has one of the following circumstances, it shall be judged as a major accident hidden danger:
(1) The meeting room, activity room, rest room, operation room, shift room, dressing room (including bathhouse) and other six types of personnel gathering places are set up in the floor area of the molten metal lifting span.
[Interpretation]
1.
(2) "Floor area" refers to the zero-meter ground area in the workshop bounded horizontally by the side line of the column near the molten metal lifting side on both sides of the molten metal lifting span and longitudinally by the wall on both sides of the lifting span. The transverse direction refers to the traveling direction of the trolley of the crane for lifting molten metal, and the longitudinal direction refers to the traveling direction of the cart of the crane for lifting molten metal.
(3) "Operation room" includes control room, inspection room and laboratory (the same below for non-ferrous enterprises). 2.
Note: "Floor area directly below" refers to the workshop floor area horizontally bounded by the column sideline of the column on both sides of the lifting span near the molten metal lifting side, and vertically bounded by the molten metal lifting process limit boundary at the two ends of the lifting span; "Lifting process limit boundary" refers to the vertical boundary position reached by the outer wall of the tank (ladle, basin) in the longitudinal direction close to the extreme end when the molten metal tank (ladle, basin) is located at the loading position, pouring position, casting position or the limit lifting point of the ground track due to the needs of the production process (the same below for non-ferrous enterprises, Figure 5-1).
(2) During the production period, there are six types of non-productive water accumulation in the accident pits and slag pits under the furnace in the smelting, refining and casting production areas, as well as in the front platform of the furnace, the furnace base area, the lifting in the workshop and the ground transportation channel within the scope of molten metal leakage and splashing.
[Interpretation]
1.2.
(2) During the production period, there is water in the molten metal lifting channel in the plant and the ground transportation channel in the plant.
3.
(2) During the production period, it is set in the smelting, refining and casting production areas to collect (discharge) water leakage from maintenance and equipment failures and process cooling water in the drainage ditch (groove) to keep the water flowing.
(3) During the production period, there is water in the slag and liquid slag slow cooling site in the plant.
(3) There are no emergency discharge and emergency storage facilities in the molten metal casting process (except for tilting melting furnace, tilting holding furnace, tilting melting and holding integrated furnace and fixed melting furnace with holding furnace);
[Interpretation]
1.
Note: "Casting furnace" refers to the casting furnace group directly connected with the casting deep well through the launder and the distribution launder, including the holding furnace (static furnace) and the melting and holding integrated furnace, excluding the melting furnace with separate melting function (the same below for non-ferrous enterprises).
(2) The capacity of the emergency storage facility of the fixed casting furnace for the molten metal deep well casting process is less than rated charging capacity of the furnace body; when multiple fixed casting furnaces share the emergency storage facility, the capacity of the emergency storage facility is less than rated charging capacity of the maximum single furnace body.
2.
(4) Smelting furnaces, casting machines (except crystallizers for deep well casting process of aluminium processing) and heating furnaces with water cooling are not equipped with emergency water sources.
[Interpretation]
1.
(2) Emergency water supply facilities are not equipped with emergency power supply.
Note: "Emergency power supply" refers to double-circuit power supply, UPS power supply, diesel generator capable of automatic conversion, or other power sources with the same level of emergency function; high-level water tower (tank, pool) and other facilities that realize emergency water supply through gravity flow, not involving emergency power supply (the same below for non-ferrous enterprises).
2.
(5) The closed-circuit circulating water-cooled element of the molten metal smelting furnace is not equipped with a monitoring and alarm device for the outlet water temperature and the difference between the inlet and outlet water flow, or the open-circuit water-cooled element is not equipped with a monitoring and alarm device for the inlet water flow and pressure, or the outlet water temperature of the open-circuit water-cooled element is not monitored.
[Interpretation]
Judgment situation:
(1) The closed-circuit circulating water cooling elements of molten metal smelting, smelting and refining furnaces are not equipped with monitoring and alarm devices for outlet water temperature and flow difference between inlet and outlet water.
(2) The open-circuit water-cooling elements of molten metal smelting, smelting and refining furnaces and kilns are not equipped with water inflow and pressure monitoring and alarm devices.
Note: The settings of outlet water temperature, inlet water flow, inlet and outlet water flow difference, and pressure monitoring and alarm devices can be set in different areas and categories according to the water supply characteristics of different water cooling elements of the molten metal furnace, that is, not each water cooling element must be equipped with a corresponding monitoring and alarm device separately.
(3) The outlet water temperature of open-circuit water-cooled elements of molten metal smelting, smelting and refining furnaces was not detected.
Note: Detection methods include regular manual detection and online real-time monitoring. When the enterprise manually detects the outlet water temperature of the open-circuit water cooling element, the detection shall be carried out in accordance with the requirements of the management system or operating procedures, and the detection results shall be recorded in writing.
(6) The cooling water system of the crystallizer in the deep well casting process of aluminum processing is not equipped with monitoring and alarm devices for water inlet pressure and water inlet flow, or the monitoring and alarm devices are not interlocked with the quick cut-off valve, emergency discharge valve and launder disconnection device, or the monitoring and alarm devices are not interlocked with the control system of the tilting casting furnace.
[Interpretation]
Judgment:
(1) The cooling water system of the crystallizer is not equipped with monitoring and alarm devices for water inlet pressure and water inlet flow.
(2) The monitoring alarm signals of the cooling water inlet pressure and flow of the crystallizer are not interlocked with the quick shut-off valve or the emergency drain valve.
(3) The monitoring and alarm signals of the cooling water inlet pressure and flow of the crystallizer are not interlocked with the launder disconnecting device.
(4) The monitoring alarm signals of the cooling water inlet pressure and flow of the crystallizer are not interlocked with the tilting control system of the tilting casting furnace.
(7) There is no liquid level monitoring and alarm device at the entrance of the molten aluminum outlet launder, launder and die plate (distribution launder) of the casting furnace for deep well casting process of aluminum processing, or there is no mechanical locking device at the molten aluminum outlet of the fixed casting furnace.
[Interpretation]
Judgment situation:
(1) The liquid level monitoring and alarm device is not set at the outlet launder of the molten aluminum of the casting furnace or at the connection between the launder and the inlet of the die plate (distribution launder).
Note: Each crystallizer of the casting deep well (such as flat ingot production, the same below for non-ferrous enterprises) or each runner of the mold plate is equipped with a liquid level monitoring and alarm device, which is regarded as the connection between the launder of the casting furnace and the inlet of the mold plate (distribution launder).
(2) The molten aluminum outlet of the fixed casting furnace is not provided with a mechanical locking device.
(8) There is no emergency discharge valve in the aluminum liquid launder of the fixed casting furnace of the deep well casting process for aluminum processing, or there is no quick cut-off valve (disconnection device) at the connection between the launder and the inlet of the die plate (distribution launder). Or the liquid level monitoring and alarm device at the connection between the launder and the inlet of the die plate (distribution launder) is not interlocked with the quick cut-off valve (disconnection device) and the emergency discharge valve.
[Interpretation]
Judgment:
(1) The molten aluminum launder of the fixed casting furnace is not provided with an emergency discharge valve.
Note: For the fixed casting furnace with a disconnection device at the connection between the launder and the inlet of the die plate (distribution launder), the aluminum liquid launder may not be provided with an emergency drain valve.
(2) There is no quick shut-off valve or disconnecting device at the connection between the launder of the fixed casting furnace and the inlet of the die plate (distribution launder).
(3) The liquid level monitoring alarm signal at the connection between the fixed casting furnace launder and the inlet of the die plate (distribution launder) is not interlocked with the quick shut-off valve, the disconnection device and the emergency discharge valve.
Note: Each crystallizer of the casting deep well or each flow channel of the mold plate is equipped with a liquid level monitoring and alarm device, and each monitoring and alarm device is interlocked with the emergency drain valve and the quick cut-off valve (disconnection device), which is regarded as a liquid level monitoring and alarm device at the connection between the fixed casting furnace launder and the inlet of the mold plate (distribution launder). And interlock with that quick cut-off valve, the disconnecting device and the emergency drain valve.
(IX) There is no quick shut-off valve (disconnecting device) at the connection between the launder of the tilting casting furnace and the inlet of the mold tray (distribution launder) for the deep well casting process of aluminum processing, or the liquid level monitoring and alarm device at the connection between the launder and the inlet of the mold tray (distribution launder) is not interlocked with the tilting control system of the casting furnace and the quick shut-off valve (disconnecting device).
[Interpretation]
Judgment:
(1) There is no quick shut-off valve or disconnecting device at the connection between the launder of the tilting casting furnace and the inlet of the die plate (distribution launder).
(2) The liquid level monitoring alarm signal at the connection between the launder of the tilting casting furnace and the inlet of the die plate (distribution launder) is not interlocked with the quick shut-off valve or the disconnection device.
(3) The liquid level monitoring alarm signal at the connection between the launder of the tilting casting furnace and the inlet of the die plate (distribution launder) is not interlocked with the tilting control system.
Note: Each crystallizer of the casting deep well or each runner of the mold tray is equipped with a liquid level monitoring and alarm device, and each alarm device is interlocked with the quick cut-off valve (disconnection device) and the tilting control system, which is regarded as a liquid level monitoring and alarm device at the connection of the inlet of the pouring furnace launder and the mold tray (distribution launder). It is interlocked with the quick shut-off valve (disconnecting device) and the pouring furnace tilting control system.
(4) There is no emergency power supply for liquid level monitoring alarm device, emergency discharge valve, quick cut-off valve and disconnection device.
(10) Non-steel-cored wire ropes are selected for the steel wire winch system of the deep well casting machine for aluminum processing, or the system of regular inspection and replacement of wire ropes is not implemented.
[Interpretation]
Judgment:
(1) Non-steel core wire rope is selected for the steel wire winch system.
(2) The steel wire rope is not inspected regularly according to the requirements of the regular inspection and replacement system of the steel wire rope.
Note: The periodic inspection shall be conducted at least once a month.
(3) If the wire rope shall be scrapped, it shall still be used.
(11) No fixed gas concentration monitoring and alarm device is installed in the places and locations where four toxic gases, such as carbon monoxide, hydrogen arsenide, chlorine and hydrogen sulfide, may leak or accumulate, or the monitoring data are not connected to the places where people are on duty 24 hours a day, or the same effective detection measures are not taken in the places and locations where hydrogen arsenide may exist.
[Interpretation]
1.
(2) "Places and positions where hydrogen arsenide gas may leak and accumulate" refer to the acid leaching process, solution purification process, sponge cadmium process, indium replacement process, etc. In lead and zinc smelting; the electrolyte purification process in copper smelting, and the copper electrowinning process for dust recovery; Impurity removal process in tin smelting.
(3) "Places and positions where chlorine leakage and accumulation may occur" refer to the liquid chlorine storage and vaporization room for precious metal production; chlorination and gold separation process (gold separation kettle, primary reduction kettle, secondary reduction kettle, etc.) and palladium precipitation process; liquid chlorine storage and vaporization room for germanium production; chlorination process, rectification (re-evaporation) process; Liquid chlorine chlorination refining process in lead-bismuth refining process (such as bismuth chlorination refining pot).
(4) "Places and parts where hydrogen sulfide gas may leak and accumulate" refer to the sewage treatment system using sulfur gypsum arsenic removal process (such as adding sodium sulfide or sodium hydrosulfide into waste acid to produce hydrogen sulfide, using water to electrolyze hydrogen and react with sulfur to produce hydrogen sulfide, methanol cracking to produce hydrogen and react with sulfur to produce hydrogen sulfide, etc.); Storage place of sodium sulfide and sodium hydrosulfide (for example, sodium sulfide and sodium hydrosulfide are stored in the same warehouse with acid or produce hydrogen sulfide due to dampness).
2.
(2) The real-time data of the fixed gas concentration monitoring and alarm device in the places and locations where the leakage and accumulation of carbon monoxide, hydrogen arsenide, chlorine and hydrogen sulfide may occur are not connected to the places where people are on duty for 24 hours.
Note: For enterprises with non-24-hour continuous production, the real-time data of on-site fixed gas concentration monitoring and alarm devices shall be connected to the places where people are on duty during production.
(3) In places and locations where hydrogen arsenide gas leakage and accumulation may occur and fixed gas concentration monitoring and alarm devices are not installed, mercuric bromide (mercuric chloride) test paper is not used to detect the concentration of hydrogen arsenide gas.
3.
(12) There is no pressure monitoring and alarm device in the gas main of the combustion device using gas (natural gas) and forced air supply, or the monitoring and alarm device is not interlocked with the emergency automatic cut-off device.
[Interpretation]
1.2.
(2) The emergency automatic cut-off device of the inlet main pipeline of the single gas equipment using gas (natural gas) is not interlocked with the low pressure monitoring device of the gas inlet main pipeline.
(13) The maximum sealing gas pressure of the water-sealed drainer of the positive pressure gas transmission and distribution pipeline is less than 30 kPa, or the two sides of the partition device of the same gas pipeline share a drainer, or the drainage pipes above the drainers of different gas pipelines are connected, or the gas pipelines of different media share a drainer.
[Interpretation]
1.2.
(2) Both sides of the partition device of the same gas transmission and distribution pipeline share a drainer.
And (3) that drain pipe at the upper parts of the drainer of the different gas pipelines are communicated.
3.
(2) The positive and negative pressure working condition drain pipes on both sides of the partition device of the inlet and outlet pipeline of the gas extractor share water to seal the well (tank). Article
6 If a building materials enterprise has any of the following circumstances, it shall be judged as a hidden danger of a major accident:
(1) The bag dust collector of the coal mill and the pulverized coal bunker are not equipped with temperature and fixed carbon monoxide concentration monitoring and alarm devices, or are not equipped with gas fire extinguishing devices.
[Interpretation]
Judgment situation:
(1) The ash hopper or air inlet and outlet of the coal mill bag dust collector are not equipped with temperature monitoring and alarm devices.
(2) The cone of the pulverized coal bunker is not provided with a temperature monitoring and alarm device.
(3) There is no fixed carbon monoxide concentration monitoring and alarm device at the air outlet of the coal mill bag dust collector.
(4) The pulverized coal bunker is not equipped with a fixed carbon monoxide concentration monitoring and alarm device.
(5) The coal mill bag dust collector or pulverized coal bunker is not equipped with gas fire extinguishing device, or the gas fire extinguishing device is not equipped with automatic control, manual control and mechanical emergency operation at the same time.
(2) The manual clearing operation of the cylindrical storage has not implemented the safety measures to prevent falling from high places and collapse in the clearing plan.
[Interpretation]
Judgment situation:
(1) The manual clearing operation of the cylindrical storage has not formulated the clearing plan.
(2) The manual cleaning scheme of the cylindrical storage lacks safety measures to prevent accidents such as falling from high places, collapse, burial and suffocation.
(3) Safety measures to prevent accidents such as falling, collapse, burial and suffocation are not implemented during manual cleaning of cylindrical storage.
(3) The cylindrical storage of carbide slag raw materials in cement enterprises is not equipped with a fixed combustible gas concentration monitoring and alarm device, or the monitoring and alarm device is not interlocked with the accident ventilation device.
[Interpretation]
Judgment:
(1) There is no fixed combustible gas concentration monitoring and alarm device capable of monitoring the concentration of acetylene gas at the top of the carbide slag raw material silo of the cement enterprise.
(2) There is no emergency ventilation device in the carbide slag raw material silo of cement enterprises.
(3) The fixed combustible gas monitoring and alarm device of the carbide slag raw material silo in the cement enterprise is not interlocked with the emergency ventilation device.
(4) Before entering cylindrical storage, roasting kiln, preheater cyclone, decomposition furnace, shaft furnace, grate cooler, mill and crusher, no quarantine measures have been taken for equipment that may be accidentally started and materials, high-temperature gases, toxic and harmful gases that may be poured in, or no safety measures have been taken to prevent falling and collapse from high places.
[Interpretation]
Judgment:
(1) When working in the cylindrical storage, grate cooler, mill and crusher, the power supply of the equipment is not cut off in the power distribution room and the equipment is locked and tagged.
(2) When entering the cylindrical storage, roasting kiln, preheater cyclone, decomposition furnace, shaft furnace, grate cooler, mill and other operations, the valves and flashboards to prevent the influx of materials, high temperature or toxic and harmful gases are not closed, and the power is cut off, locked and tagged.
(3) When working in cylindrical storage, roasting kiln, preheater cyclone, decomposition furnace, shaft furnace and grate cooler, no measures are taken to prevent the materials above the working surface from collapsing and injuring people, or no measures are taken to prevent falling from high places.
(5) The gas mains of gas kilns using premixed combustion (except thermal generators and gas kilns) are not equipped with pipeline pressure monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with emergency automatic cut-off devices.
[Interpretation]
1.2.
(2) There is no emergency automatic shut-off valve on the gas header of the gas kiln with premixed and partially premixed combustion mode.
(3) The emergency automatic shut-off valve of the gas main pipe of the gas kiln adopting the premixed and partially premixed combustion mode is not interlocked with the pressure monitoring and alarm device.
3.
(6) There are no fixed combustible gas concentration monitoring and alarm devices in hydrogen production stations, nitrogen and hydrogen protective gas distribution rooms, gas distribution rooms and other three types of places.
[Interpretation]
Judgment:
(1) The hydrogen generation station and the nitrogen and hydrogen protective gas distribution room are not equipped with a fixed combustible gas concentration monitoring and alarm device capable of monitoring the hydrogen concentration.
(2) There is no fixed combustible gas concentration monitoring and alarm device in the gas distribution room.
(7) Failure of the water cooling equipment of the electric furnace for electric melting products.
[Interpretation]
Judgment situation:
the water cooling equipment of the electric furnace for electric melting products is leaking.
(8) Glass kilns, glass tin baths and other equipment are not equipped with monitoring and alarm devices for water-cooled and air-cooled protection systems.
[Interpretation]
Judgment:
(1) The water inlet header of the water cooling equipment of the glass furnace and glass tin bath is not equipped with a water flow monitoring alarm device, nor is it equipped with a pressure monitoring alarm device.
(2) The water cooling equipment such as the front face water bag of the glass furnace, the tin liquid cooling water bag of the glass tin bath and the lip brick water bag are not equipped with the water outlet temperature monitoring alarm.
(3) Air cooling protection equipment such as tank wall fan of glass furnace, steel slag fan, L hanging wall fan and bottom fan of glass tin bath is not equipped with shutdown alarm device. Article
7 If a machinery enterprise has one of the following circumstances, it shall be judged as a major accident hidden danger:
(1) The meeting room, activity room, rest room, dressing room, shift room and other five types of personnel gathering places are set up in the floor area of the molten metal lifting span or pouring span.
[Interpretation]
1.
(2) "Pouring span" refers to the column spacing (fence) and span area at both ends of the plant where the molten metal is hoisted and transported in the pouring operation area (Figure 7-1).
Note: "Floor area directly below" refers to the floor area horizontally bounded by the side line of the column near the molten metal lifting side on both sides of the lifting span and vertically bounded by the limit boundary of the molten metal lifting process (Fig. 7-3).
Note: "Solid wall" refers to brick wall, concrete wall or wall built with refractory materials.
(Two) casting smelting furnace, refining furnace and holding furnace are not equipped with emergency discharge and emergency storage facilities.
[Interpretation]
1.
(2) The volume of emergency storage facilities for casting smelting furnace, refining furnace and holding furnace is less than maximum capacity of the furnace body.
(3) Two or more smelting furnaces, refining furnaces and holding furnaces share emergency storage facilities, and their capacity is less than sum of the furnace body capacity of each smelting furnace, refining furnace and holding furnace.
2.
(3) During the production period, there is water in the bottom, pit and accident pit of the smelting furnace, refining furnace and holding furnace for casting, as well as in the front platform, furnace base area, molding pit, pouring pit and molten metal transfer channel within the scope of molten metal leakage and splashing.
[Interpretation]
1.
(2) There is ponding in the molding pit and pouring pit during production.
(3) During the production period, there is water in the plane directly below the molten metal transfer channel and the 3 meters around it.
(4) When the overhead layer transfers the molten metal through the fixed rail, there is water on the surface of the overhead layer.
2.
(2) During the production period, it is set in the smelting, refining and casting production areas, which is used to collect and drain the water leakage caused by maintenance and equipment failure, as well as the water in the drainage ditch (groove) of process cooling water to maintain the flow state.
(4) The cooling water system of smelting furnace, refining furnace, die-casting machine and oxygen lance for casting is not equipped with monitoring and alarm devices for outlet water temperature and flow difference between inlet and outlet water, or the monitoring and alarm devices are not interlocked with the control system for heating and conveying molten metal.
[Interpretation]
1.
(2) The cooling water system of the smelting furnace and refining furnace for casting is not equipped with a monitoring and alarm device for the flow difference between inlet and outlet water, or the monitoring and alarm device for the flow difference between inlet and outlet water is not interlocked with the molten metal heating system.
(3) The cooling water system used for die casting machine mold temperature control is not equipped with outlet water temperature monitoring and alarm device, or the outlet water temperature monitoring and alarm device is not interlocked with the molten metal conveying control system.
(4) The cooling water system used for die casting machine mold temperature control is not provided with the monitoring alarm device for the flow difference between inlet and outlet water (or the equivalent leakage detection alarm device, such as the water pressure monitoring alarm device), or the monitoring alarm device for the flow difference between inlet and outlet water (or the equivalent leakage detection alarm device, such as the water pressure monitoring alarm device) is not interlocked with the molten metal conveying control system.
(5) The cooling water system of the oxygen lance is not provided with an outlet water temperature monitoring and alarm device, or the outlet water temperature monitoring and alarm device is not interlocked with the oxygen delivery control system.
(6) The cooling water system of the oxygen lance is not provided with a monitoring and alarm device for the flow difference between the inlet and outlet water, or the monitoring and alarm device for the flow difference between the inlet and outlet water is not interlocked with the oxygen delivery control system.
2.
(5) The gas main of the combustion device using gas (natural gas) is not equipped with a pipeline pressure monitoring and alarm device, or the monitoring and alarm device is not interlocked with the emergency automatic cut-off device, or the combustion device is not equipped with a flame monitoring and flameout protection system.
[Interpretation]
1.2.
(2) The pressure monitoring and alarm device of the gas main of the combustion device using gas (natural gas) is not interlocked with the emergency automatic cut-off device.
(3) Combustion devices using coal gas (natural gas) are not equipped with flame monitoring and flameout protection systems.
(6) When using flammable organic solvents to clean equipment, facilities, tooling and the ground, no measures have been taken to prevent the accumulation of flammable gases in the surrounding closed or semi-closed spaces.
[Interpretation]
Judgment:
(1) When flammable organic solvents are used to clean equipment, facilities, tooling and the ground, no measures such as mechanical ventilation are taken to prevent the accumulation of flammable gases in confined spaces or semi-confined spaces.
(2) When flammable organic solvents are used to clean equipment, facilities, tooling and the ground, no measures such as quarantine and plugging are taken to prevent flammable gases from escaping into the surrounding closed or semi-closed space.
(7) Paint mixing rooms and spray rooms using non-water-based paint are not equipped with fixed combustible gas concentration monitoring and alarm devices or ventilation facilities.
[Interpretation]
1.2.
(2) No ventilation facilities are provided in the paint mixing room and spray booth where non-water-based paint is used.
(3) The ventilation rate of paint mixing room and spray booth using non-water-based paint shall be less than 15 times/hour.
Note: "Air change rate" refers to the number of indoor air changes per unit time, that is, the ratio of ventilation rate to room volume. Article
8 If a light industrial enterprise has any of the following circumstances, it shall be judged as a major accident hidden danger:
(1) The baking and frying equipment of a food manufacturing enterprise is not equipped with an automatic cut-off device to prevent overheating.
[Interpretation]
1.2.
(2) The frying equipment of food manufacturing enterprises is not equipped with an automatic cut-off device to prevent overheating.
(2) Liquor blending, filling sites and liquor warehouses are not equipped with fixed ethanol vapor concentration monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with ventilation facilities.
[Interpretation]
1.2.
(2) Liquor blending and filling sites and liquor warehouses of liquor production enterprises are not equipped with mechanical ventilation facilities.
(3) The fixed ethanol vapor concentration monitoring and alarm devices in liquor blending and filling places and liquor warehouses of liquor production enterprises are not interlocked with ventilation facilities.
3.
(3) Pulp manufacturing and papermaking enterprises use steam and open fire to directly heat cylinders to vaporize liquid chlorine.
[Interpretation]
Judgment:
(1) Pulp manufacturing and papermaking enterprises use steam to directly heat cylinders to vaporize liquid chlorine.
(2) Pulp manufacturing and papermaking enterprises use open fire to directly heat cylinders to vaporize liquid chlorine.
(4) The gas mains of gas kilns (except thermal generators and gas kilns) using premixed combustion in daily-use glass and ceramics manufacturing enterprises are not equipped with pipeline pressure monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with emergency automatic cut-off devices.
[Interpretation]
1.2.
(2) The gas header of the gas kiln is not equipped with an emergency automatic cut-off device.
(3) The pipeline pressure monitoring and alarm device of the gas main is not interlocked with the emergency automatic cut-off device.
3.
(5) The cooling protection system of glass kilns in daily-use glass manufacturing enterprises is not equipped with monitoring and alarm devices.
[Interpretation]
Judgment:
(1) No cooling protection system is provided for the glass furnace of the daily-use glass manufacturing enterprise.
(2) If the water-cooling protection system is used in the glass furnace of a daily-use glass manufacturing enterprise, the water inlet header is not equipped with a water flow monitoring and alarm device, nor is it equipped with a pressure monitoring and alarm device.
(3) If the air-cooled protection system is used in the glass kiln of the daily-use glass manufacturing enterprise, the fan shutdown monitoring and alarm device is not set.
(6) Paint mixing rooms and spray rooms using non-water-based paint are not equipped with fixed combustible gas concentration monitoring and alarm devices or ventilation facilities.
[Interpretation]
1.2.
(2) No ventilation facilities are provided in the paint mixing room and spray booth where non-water-based paint is used.
(3) The ventilation rate of paint mixing room and spray booth using non-water-based paint shall be less than 15 times/hour.
Note: "Air change rate" refers to the number of indoor air changes per unit time, that is, the ratio of ventilation rate to room volume.
(seven) lithium ion battery storage warehouse has not taken effective physical quarantine measures for faulty batteries.
[Interpretation]
1.
(2) "Physical quarantine measures" refers to the measures of quarantine between faulty batteries and non-faulty batteries by means of solid walls, explosion-proof cabinets, iron cabinets, separate containers, fire shutters, etc.
2.
Article 9 If a textile enterprise has one of the following circumstances, it shall be judged as a hidden danger of a major accident:
(1) Vaporization chambers, gas storage tanks, oil storage tanks and heat medium furnaces for heat setting processes such as singeing, opening and drying of yarn, thread and fabric processing. It is not separated or set up separately from the gathering places of production and processing personnel.
[Interpretation]
1.
(2) "Separate setting" means that the equipment and facilities with high safety risks, such as vaporization chamber, gas storage tank, oil storage tank and heat medium furnace, are set outside the production plant and separated from the personnel gathering place in the production plant.
2.
(2) Sodium hydrosulfite, hydrogen peroxide, sodium hypochlorite, sodium chlorite, carved white powder (suspended white block) are mixed with taboo materials for storage, or no waterproof and moisture-proof measures are taken in the place where sodium hydrosulfite is stored.
[Interpretation]
1. When sodium hydrosulfite (sodium dithionite) and rongalite (sodium formaldehyde sulfoxylate) are in contact with acids and oxidants, or when hydrogen peroxide (hydrogen peroxide aqueous solution), sodium hypochlorite and sodium chlorite are in contact with reducing agents, strong oxidation-reduction reactions are prone to occur. Releasing heat and toxic substances.
2.
(2) The sodium hydrosulfite is stacked in the open air.
(3) No waterproof and moisture-proof measures are taken in the indoor places where sodium hydrosulfite is stored. Article
10 If a tobacco enterprise has any of the following circumstances, it shall be judged as a major accident hidden danger:
(1) The fumigation workplace is not equipped with a phosphine gas concentration monitoring and alarm instrument, or is not equipped with a gas mask, or is not confirmed that all unrelated personnel have been evacuated from the fumigation workplace before the fumigation insecticidal operation.
[Interpretation]
1.2.
(2) During fumigation application, inspection and gas dispersion operations, gas masks matching the properties of phosphine gas are not equipped and used.
(3) Before fumigation and pesticide application, all unconfirmed irrelevant personnel shall be evacuated from the fumigation operation site.
(2) The production lines and places where liquid carbon dioxide is used to produce expanded cut tobacco are not equipped with fixed carbon dioxide concentration monitoring and alarm devices, or the monitoring and alarm devices are not interlocked with emergency ventilation facilities.
[Interpretation]
1.2.
(2) The production line and place where liquid carbon dioxide is used to produce expanded cut tobacco are not equipped with emergency ventilation facilities.
(3) The fixed carbon dioxide concentration monitoring and alarm device is not interlocked with the emergency ventilation facility. Article
11 If an industrial and trade enterprise with dust explosion hazard has one of the following circumstances, it shall be judged as a major accident hidden danger:
(1) The dust explosion hazard site is located in a multi-storey building (structure) with non-frame structure. Or there are staff dormitories, conference rooms, offices, lounges and other places where people gather in dangerous places of dust explosion.
[Interpretation]
1.2.
(2) Staff dormitories, meeting rooms, offices, lounges, etc. where people may gather are set up in the dust explosion hazardous area.
(2) Different types of combustible dust, combustible dust and combustible gas and other media that are liable to aggravate the risk of explosion share a set of dust removal systems, or different buildings (structures) and different fire compartments share a set of dust removal systems and dust removal systems are interconnected.
[Interpretation]
1.2.
(2) Combustible dust and combustible gas (including steam) share a set of dust removal system.
(3) Dust-producing points in two or more independent buildings (structures) share one set of dust removal system.
(4) Dust producing points in different fire compartments of the same building (structure) share one set of dust removal system.
(5) Dust removal systems of different buildings and structures and different fire compartments are connected through dust removal pipelines, air outlet pipes and fans.
Note: The square pipe with scraper function is used for dust removal in wood products processing enterprises, and it is regarded as dust removal air duct.
3.
(2) Due to the needs of production processes such as grain grinding, starch and feed processing in industrial and trade enterprises, the dust removal system vertically crosses different fire compartments but is set up independently according to the process flow.
(3) The dust removal systems of two or more fire compartments are equipped with air lock and ash unloading devices, which are interconnected through ash conveying pipelines.
(4) Two or more dust removal system fans in the fire compartment share one exhaust chimney.
(Three) the dry dust removal system has not taken any explosion provention and control measures such as explosion venting, inerting and explosion suppression.
[Interpretation]
1.2.
(2) The dry dedusting system only uses observation windows, cleaning holes and manholes as explosion venting measures.
(3) When the dry dedusting system takes gas inerting measures, it does not take online monitoring and alarm measures for oxygen content.
(4) When explosion suppression measures are taken for the dry dedusting system, the explosion suppressant used by the explosion suppression device is not applicable to the treated dust.
3.
(2) Sand blasting machine, shot blasting machine and electrostatic spraying process are specially used for cyclone dust collector for solid-gas separation and collection of sand blasting, steel shot and electrostatic spraying powder.
(3) Two-stage and above dry dedusting system with explosion control measures, and primary cyclone dust collector for collecting larger particles of dust.
(4) Aluminum, magnesium and other metal dust removal systems use positive pressure dust removal methods, or other combustible dust removal systems use positive pressure blowing dust, without taking measures to prevent ignition sources such as spark detection and elimination.
[Interpretation]
Judgment:
(1) The dust removal system for combustible dust produced by aluminum, magnesium, zinc, titanium and other metals or metal alloys adopts the positive pressure dust removal method.
(2) When the dedusting system for other combustible dusts adopts positive pressure to blow dust, no measures to prevent ignition sources such as spark detection and elimination are taken between the fan and the dust collector box.
(5) The dust removal system uses a gravity settling chamber for dust removal, or uses a dry roadway structure as a dust removal duct.
[Interpretation]
1.2.
(2) The dust removal system uses brick-concrete or concrete dry roadway as the dust removal air duct.
3.
(6) Dry dedusting systems for metal dust such as aluminium and magnesium and wood dust are not equipped with air locking and ash unloading devices.
[Interpretation]
1. The widely used air-lock ash discharge devices include star ash discharge valve, double-layer gate valve, etc.
2.
(2) The dry dedusting system for wood dust is not equipped with an air lock and ash unloading device.
(7) Electrical equipment in dust explosion hazardous areas divided into 20 zones, such as dust collectors and dust collection bins, does not meet the explosion-proof requirements.
[Interpretation]
1.2.
(2) The installation of explosion-proof electrical lines in Zone 20 does not meet the explosion-proof requirements.
(8) Before crushing, grinding, granulating and other process equipment that are prone to mechanical ignition sources, there is no device for removing iron, stone and other debris, or there is no device for detecting and eliminating sparks in the air duct connected between the wood product processing enterprise and the sander.
[Interpretation]
1.2.
(2) The air duct connecting the wood product processing enterprise and the sander is not equipped with a spark detection and elimination device.
Note: The spark detection and elimination device shall be installed in the main inlet duct of the dust collector connected to the sander, or in the branch duct connected to each sander.
(9) Measures to prevent hydrogen accumulation, such as ventilation, are not taken in the places where metal dust is collected, stacked or stored in case of wet spontaneous combustion, or waterproof and moisture-proof measures are not taken in the places where metal dust is collected, stacked or stored in dry form.
[Interpretation]
Judgment:
(1) The collection, stacking and storage sites of aluminum powder, magnesium powder, aluminum-magnesium alloy powder and other metal dusts that spontaneously combust when wet have not taken measures such as ventilation to prevent hydrogen accumulation.
(2) Aluminum powder, magnesium powder, aluminum-magnesium alloy powder and other metal dust collected, stacked and stored in wet and spontaneous combustion places are not provided with waterproof and moisture-proof measures.
(Ten) failing to implement the dust cleaning system, resulting in serious dust accumulation at the work site.
[Interpretation]
Judgment:
the dust cleaning system is not formulated, or the dust is not cleaned up in time according to the requirements of the cleaning system, resulting in serious dust accumulation at the operation site. Article
12 An industrial and trade enterprise that uses liquid ammonia for refrigeration shall be judged as a major hidden danger of accident under any of the following circumstances:
(1) The air-conditioning system of the packaging, segmentation and product finishing places uses ammonia for direct evaporation refrigeration.
[Interpretation]
Judgment:
(1) The air conditioning system of the packaging room, the cutting room and the product finishing room adopts ammonia direct evaporation refrigeration.
(2) Ammonia direct evaporation refrigeration cold storage, hall and closed platform are used as processing, sorting and packaging workplaces.
(2) The rapid freezing device is not set up in a separate working room, or the number of workers in the working room of the rapid freezing device exceeds 9.
[Interpretation]
1.2.
(2) The rapid freezing device is set in a separate operation room, but the number of operators in the separate operation room is more than 9. Article
13 An industrial and trade enterprise operating in a confined space with the risk of hydrogen sulfide and carbon monoxide poisoning shall be judged as a major accident hazard under any of the following circumstances:
(1) Failing to identify the confined space, establish a safety management account, and set up obvious safety warning signs.
[Interpretation]
1.2.
(II) Failing to implement the examination and approval of confined space operation, or failing to implement the requirements of "ventilation first, then testing, and then operation", or failing to set up a guardian at the operation site.
[Interpretation]
Judgment situation:
(1) Before the operation in the confined space, the operation in the confined space is not approved.
(2) Before the operation in the confined space, the ventilation and gas concentration test are not carried out, or the operation in the confined space is carried out when the toxic gas concentration test is not qualified.
(3) There is no special guardian at the confined space operation site, or the guardian enters the confined space to participate in the confined space operation, or the guardian does not supervise the whole process. Article
14 The monitoring, alarm, protection and other facilities, equipment and devices directly related to production safety under the circumstances listed in this Standard shall ensure their normal operation and use, and their failure or invalidity shall be judged as hidden dangers of major accidents.
[Interpretation]
Due to inadequate testing, maintenance and maintenance, or through closure, destruction, tampering and other means, the monitoring, alarm, protection and other facilities, equipment and devices directly related to production safety in the situations listed in this standard are caused. In the state of not being powered on, not being enabled, not being interlocked, data distortion, etc., which can not be operated and used normally, all of them are judged as major accident hidden dangers. Article
15 This Standard shall come into force as of May 15, 2023. The Standards for Determining Hidden Dangers of Major Production Safety Accidents in Industry and Trade (2017 Edition) (No.129 of General Administration of Safety Supervision, 2017) shall be abolished at the same time.
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