ã€ä¸€ã€‘ Equipment and facilities
Reactor, reactor
1) Reducer noise is abnormal
2) More oil on the reducer or frame
3) Reducer plastic blade hot melt deformation
4) Machine seal, reducer lack of oil
5) Gasket leakage
6) The anti-static grounding wire is damaged and not installed.
7) Safety valve has not been inspected, leaked, and no account has been established.
8) The thermometer has not been inspected and damaged
9) The pressure gauge has not been inspected, damaged or blocked by materials.
10) The key reaction kettle does not use double sets of temperature, pressure display, and record alarm
11) The rupture disc has not expired, leaked, and no account has been established.
12) The rupture disc under the valve is not open
13) There is an explosion hazard. The reactor is not equipped with rupture discs.
14) Abnormal pressure rise or flushing due to high temperature, agitation interruption, etc.
15) The bottom valve is easy to block when discharging
16) Acid corrosion in stainless steel or carbon steel kettle
17) Overload operation such as loading exceeding the specified limit
18) The enamel damage in the enamel kettle is still used in corrosive, flammable and explosive places.
19) The reactor liner is washed and damaged at the jacket steam inlet
20) Pressure vessel exceeds service life, manufacturing quality is poor, and it still leaks after repeated repairs
21) Pressure vessel has no nameplate
22) Missing number identification or unclear
23) Failure to effectively isolate reactors with explosive sensitivity
24) Important equipment does not have a safety checklist
25) Missing spare parts or spare equipment for important equipment
2. Storage tank, tank area, tank truck
1) The level gauge is blurred or damaged, blocked
2) The electrostatic ground wire is loose or not connected
3) Leakage at the flange gasket
4) The small platform and other high storage tanks are not effectively fixed
5) The safety liquid seal liquid level does not meet the requirements
6) Atmospheric pressure storage tank with pressure
7) The amount of charge exceeds the specified limit
8) Very warm storage tank without thermometer
9) The container is cracked and still in use
10) Frequently subjected to vacuum and nitrogen alternating load to damage the tank
11) Low boiling point solvent or liquefied gas storage tank is exposed to direct sunlight
12) There are collision risks such as transportation vehicles in outdoor storage tanks, etc.
13) The barrier hole in the dangerous goods tank area is not blocked
14) The dam of the hazardous chemical tank area is not tightly sealed, and the rainwater hole is arbitrarily opened.
15) The shut-off valve leading to the drain pipe is in an unsafe state such as normally open
16) The flammable or corrosive material outlet pipeline of the hazardous chemical tank area, the bracket is not provided with the lifting pressure spring compensation measure, or the flexible connecting short tube is directly used.
17) There are no warning signs for mobile phone, forbidden fire source, high speed limit, etc.
18) No leakage in the dangerous goods tank area, feeding operation record and daily inspection
19) The tractor enters the dangerous goods tank area at will
20) There is an open fire or mountain fire around the dangerous goods tank area
21) Dangerous goods tank operation room uses electric stove, electric tea kettle, electric heating plate, etc.
22) The tank truck has no grounding device at the loading and unloading point
23) There are no measures to prevent the operator from falling from the tanker
24) Unfitted effective flame arrester and unqualified condition (light damage or brake failure) tanker entering tank area
25) Safety accessories for tank tanks (pressure gauges, thermometers, safety valves) have no inspection date or are ineffective
26) The tank car body does not indicate the date of the next inspection of the pressure vessel
27) No static towline, anti-virus equipment or valve leak on the tank
28) Grounding is not allowed for more than 10 minutes before unloading and after unloading
29) When the tanker unloads, the driver and the escort leave the discharge site without on-site guardian
30) Open and spray discharge
31) Overfill the standard tank or full material when discharging
32) Leakage at the hose or flange when the vinyl chloride tanker is unloading
33) When the vinyl chloride is transported, it is full.
34) Transportation and unloading in the factory multiple times when the tank truck is not full
35) The unloading vehicle starts the vehicle in the middle of the flameout and hand brake or unloading
36) Engage in unloading operations when high-strength lightning and lightning strikes are frequent
37) There are no 2 grounding points for the tank (micro signal: mahoupao2009)
38) When loading and unloading gasoline and toluene, the operator did not wear anti-static overalls and anti-static shoes.
39) There is no accident cofferdam and emergency spray dilution facility in the storage area of ​​liquid ammonia and other storage tanks.
40) Emergency sprinkler and eyewash facilities are not available at the site
41) There is no material mishandling measures such as ethyl acetate loading into the gasoline tank
42) Standing on the gasoline barrel for electric welding
43) Cutting the petrol drum or welding tank without cleaning
44) Liquid ammonia, vinyl chloride storage tank overload
45) When the tanker unloads, block the fire passage and encroach on the road
46) The receiver leaves the unloading site
47) Use tools such as iron and plastic that are prone to sparks at the loading and unloading site
48) There is no operation record for the material storage tank sent to the workshop from the tank area.
3. Condenser, reboiler
1) Corrosion, gasket aging, etc. cause leakage
2) The temperature of the material after condensation is too high
3) The heat exchange medium layer is blocked by sludge and microorganisms
4) High temperature surface is not protected
5) When cooling high temperature liquid (such as 150 °C), the cooling water inlet and outlet valves are not open, or the cooling water is not enough.
6) When the evaporator is used for the first time, the evaporator is rapidly heated.
7) The heat exchanger does not take into account the anti-seismic measures, so that the connected pipe is loose and leaks due to vibration.
4. Pipes and fittings
1) After the pipeline is installed, the internal welding slag and other foreign materials are not cleaned.
2) The mirror glass is not clean or damaged
3) The pressure tube and temperature resistance of the optional tube material are not suitable, and the tube is improperly installed.
4) The cylinder is broken or used for a long time.
5) Anti-static grounding wire is damaged
6) Pipes, flanges or bolts are severely corroded and cracked
7) High temperature pipeline is not insulated
8) The squib is made into a bent pipe
9) Unidentified identification of pipe material and flow direction
10) The pipeline color code is unclear
11) Different materials are connected in series during commissioning.
12) Abandoned pipes are not cleaned up in time
13) Pipe valve installation position is low, easy to hit the head or difficult to operate
14) Protective measures are not taken for leaking parts such as corrosive material pipelines and flanges
15) The possibility of entering water, nitrogen, air, steam, etc. into the material pipeline
16) Iron drums or plastic buckets for placing flammable and explosive materials on high temperature pipes
17) Unreasonable material selection for pipes or fittings, easy to corrode
18) Glass tube level gauge has no protective measures
19) No protective metal mesh is installed at the mirror glass that may explode
20) Check valve cannot be flexibly operated or disabled
21) Electric valve power failure, pneumatic valve stop
22) There is no regular maintenance or disease operation using pressure pipes such as hydrogen.
23) Operators are untrained or undocumented when using pressure piping
24) Maintenance personnel are not qualified to repair and reform the pressure pipeline
25) Pressure pipe welding quality is inferior, there are welding defects such as undercut, air hole, slag inclusion, and incomplete penetration.
26) The pressure pipe is not in accordance with the regulations. Safety accessories or safety accessories are not verified.
27) Pressure pipelines have not been filed, operating procedures
28) Glass-lined pipes are struck by steel pipes, etc.
29) The existing pipeline valve is still used after the change of production process medium, and material adaptability is not considered.
30) The nitrogen tube is connected in series with the air tube
31) The brine pipe is connected in series with the cooling water pipe
5. Transfer pump, vacuum pump
1) Pump leakage
2) Abnormal noise
3) The coupling has no protective cover
4) The pump outlet is not equipped with a pressure gauge or check valve
5) The liquid in the pump and pipeline is not drained during long-term deactivation, causing corrosion or freezing
6) When the positive displacement pump is running, the outlet valve is closed or the safety return valve is not installed.
7) The inlet diameter of the pump is small or the pipeline is long or curved.
8) Centrifugal pump installation height is higher than suction height
9) Unused anti-static belt
6. Centrifuge
1) The solvent is filtered, the pipe is not filled with nitrogen or nitrogen, or there is no flow meter on site.
2) When the solvent is filtered in the centrifuge, the oxygen meter and alarm device are not installed.
3) Quickly brake or brake with auxiliary tools (such as iron bars)
4) The centrifuge is not effectively grounded
5) Anti-static belt is not used in the explosion-proof zone
6) When the centrifuge is running, the vibration is abnormal.
7. Double cone
1) No fence and safety interlock
2) Personnel climb into the double cone to replace the vacuum bag
3) Drive belt is unprotected
4) Shaft seal leakage
5) The vacuum line is blocked or the vacuum valve is not open when in use
8. Gas cylinder
1) The gas cylinder has no bottle cap and anti-vibration ring
2) When the hydrogen cylinder is transported and stored in summer, there is no shading measure, resulting in exposure.
3) Some cylinders exceed the annual inspection period
4) When the acetylene bottle is used together with the oxygen cylinder, the safety distance is less than five meters.
5) Close the hydrogen cylinder valve with a catalyst glove
6) Tap the collision cylinder
7) After the gas cylinder is used, the air pressure is less than 0.05Mpa
8) Gas cylinder group and pipeline connection, valve damage
9) When the hydrogen bottle is used, no anti-static device is used or it is broken.
10) Gas cylinders have no anti-fall measures
11) There are trenches and dark passages in the storage place.
12) The storage place is not ventilated or poorly ventilated or corrosive gas enters
13) Fire extinguishing equipment
14) The acetylene cylinder is used down
15) The color of the gas cylinder is ambiguous
[two] electrical instrumentation
1. Non-explosion-proof electrical appliances or control cabinets are not explosion-proof in the explosion-proof zone.
2. Damage to the window glass of the power distribution room
3. There are many sundries in the distribution room
4. There are steam water, material pipes, dust and corrosive substances in the power distribution room, which causes the electrical equipment inside the electric cabinet to age, resulting in short circuit accidents.
5. There is acid mist corrosion or solvent infiltration or dust on the outside of the transformer.
6. There are clothes and other debris behind the control cabinet or transformer cabinet
7. The power distribution cabinet is too old and prone to short circuit
8. The cable is close to the high temperature pipeline
9. Leakage of material pipes, sewage pipes, etc. around the overhead cable, causing corrosive materials to flow into the cable tray
10. Buried cables are subject to groundwater corrosion
11. Severe infiltration of sewage in cable wells and ditch
12. Cable tray is severely corroded
13. Cable wire protection sleeve ageing and breaking
14. Cables or steel pipes for laying electrical lines are not strictly blocked by non-combustible materials when passing through holes in walls or floors between different locations.
15. Pulling out the air to cause the cable connector to fall off and leak
16. The switch button corresponds to the device bit number and the identification is unclear.
17. There are messy cables in the workshop
18. Emergency lighting is not installed or is broken
19. Open motor without protective cover
20. Insufficient illumination at the operating site
21. The equipment is not matched with electricity (the calf dragging the cart, the old cow dragging the cart) to form electrical equipment, heat damage, fire
22. Flushing of electrical equipment and cable trays
23. Explosion-proof mirror light, lighting, ingot loose screws, light leakage
[three] static electricity
24. In flammable and explosive places, the reaction kettle, pipeline, storage tank, condenser, transfer pump, flange, valve are not grounded or the grounding is not bad.
25. In a flammable and explosive place, the powder hopper is not grounded and filled with nitrogen.
26. Delivering liquids such as gasoline, toluene, cyclohexane, etc. at a safe flow rate (v2<0.64/d)
27. The hydrogen flow rate is over 12m/s and the branch is over 8m/s.
28. Spray gasoline, etc. from a high position into the bottom of the tank or on the ground.
29. In the absence of nitrogen, aluminum isopropoxide, magnesium powder, etc. are put into the reaction kettle containing gasoline, toluene, etc. from the open funnel.
30. Wear undressing, shoes and hats and strenuous activities in flammable and explosive places
31. In a flammable and explosive place, scrub the equipment or the floor with a mop or rag of chemical fiber material.
32. Filling the plastic barrel with gasoline
33. Wash work clothes or mopping floor or steel platform, ground with solvents such as gasoline
34. The walls of stainless steel and carbon steel tanks are not grounded with welded steel bars or flat steel. More than 50m2 is not grounded.
35. There are places where flammable and explosive gases are emitted, and measures to eliminate static hazards such as humidification are not used.
36. Use plastic pipe to suck or charge toluene or recover toluene
37. Conveying or agitating gasoline with compressed air
38. Anti-static slippers are not used in the explosion-proof clean area
39. Grounded flat steel, roof lightning protection belt rust, serious corrosion
40. Metal equipment above the roof is not welded into the lightning protection zone
[four] production site
41. More storage materials or waste
42. On-site “run, run, drip, leakâ€
43. Damage to the insulation layer
44. Missing effective fence
45. Normally closed fire doors are normally open
46. ​​Operation posts with dust (magnesium powder, zinc powder, etc.) are not cleaned up in time
47. Metal sodium, sodium hydrogen storage, no rain protection measures or waste barrels, waste bags are stored freely
48. Blockage of fire exits or obstruction of various pipelines and their supports
49. Fire extinguishers lack or have expired rust or fire hoses, fire hydrants do not meet fire protection requirements
50. There are multiple labels in the waste bin
51. Strong oxidants (hydrogen peroxide, potassium permanganate, etc.) are stacked on wooden shelves
52. The steel platform is too large
53. Steel platform or steel column is seriously corroded
54. Local area solvent concentration exceeds the standard
55. High position valve handles, iron bars, etc. are easy to fall
56. Large concrete floor vibration
57. Outdoor steel shed or roof debris
58. Anti-virus equipment expires or expires
59. Non-production equipment (food, newspapers, novels) is stored at the production site.
60. Lack of summer heatstroke cooling facilities
61. Outdoor small diameter pipe is not insulated in winter
62. There are no emergency showers, eye washes, etc. in the workshop or it is damaged.
63. The vehicle is not equipped with a flame arrester and enters the production site.
64. Inflammable and explosive places are not equipped with flammable gas alarms or malfunctions
65. Reactor, tank, pump, etc. unlabeled equipment number and name
66. The large iron gate does not have a fixed bolt. Once the wind is strong, it may cause the iron door to spark, causing danger.
67. The threshold of the warehouse is low, and in the event of an accident, dangerous goods will overflow.
68. Ground storage of iron plates and steel pipes at the production site
[five] personnel, on-site operation
69. No job operation records or operational records are incomplete
70. Absorbing, filling, and handling corrosive items without protective equipment
71. There are phenomena such as the absence of operators, leaving the post, sleeping, etc.
72. Dust masks are not worn in powder feeding positions
73. Quick switching valve
74. The stratified kettle and the bottom valve of the tank are not closed after stratification
75. The stratified kettle and tank water valve are too large, causing the oil in the water to be discharged into the sewage pool or the drainage time is too long.
76. Place the air in the high temperature kettle and the tower.
77. Extraction catalysts (such as palladium carbon, active nickel, etc.) are scattered more on site.
78. Use iron rods to smash pipes, block materials in the kettle or use sparks to create sparks
79. Noise-free environment without ear protectors or earplugs
80. Tank overpressure
81. Using flammable and explosive solvents such as gasoline and toluene, the tank and tank are not replaced by nitrogen.
82. Dust, poor ventilation or lack of oxygen
83. Pressure on the reactor cover
84. Employees have occupational taboos or allergies or exposure to poisons for too long
85. Emergency valves or emergency switches are not easy to operate
86. Wear nail shoes or high heels, sandals in flammable and explosive places
[six] civil engineering
87. There are no precautions (such as flame retardant blockage) on the upper and lower floor pipe wells where fire spread may occur.
88. Explosion-proof processes do not use explosion-proof walls and lightweight roofs or do not consider adequate venting surfaces
89. The number of entrances and exits and emergency passages is not designed or blocked or marked.
90. The foundation of the plant has been corroded by acids and alkalis, and the columns and beams have been damaged seriously.
91. When there is strong wind, the steel window glass is easy to fall off
92. The stairs are too narrow or steep
93. Poor indoor drainage or long-term accumulation of water and oil in low-lying areas
94. There is not enough space in the passage or work area, overhead and ceiling
95. Excavate the road at will in the case of unknown underground pipelines (water pipes, cables, etc.)
96. Using large machinery to dig underground near underground cables, pipes, etc.
97. When the fire broke out in the fire-prohibited area, the production workshop was not sent for supervision.
98. Abnormal conditions (pipe breakage, leakage, etc.) occurred during construction, and no immediate shutdown for emergency treatment
99. Ditches, pits, pools, etc., and damaged pipes, without fences and signs, no illumination at night
100. When the soil is found to be likely to collapse or slide, the operation is not stopped.
101. Measures to prevent underground empty tanks and empty pools from floating up
102. When working in the lower tank or the lower pool, the corresponding approval procedures have not been completed or the approval requirements have not been complied with (such as labor insurance supplies, guardian implementation, etc.), and the precautionary measures are not in place.
103. In the case of non-constructive construction, the “non-infrastructure employment procedures†were not processed or the corresponding risks were not known before the operation, and the safety measures were not in place.
[seven] production maintenance
104. In the event of cleaning and overhaul in the container, there is a dangerous situation and there is no emergency escape facility or measure.
105. No fire guards or guardians are served by new employees or in violation of regulations
106. Overload lifting
107. Tools or hanging objects are not properly fixed
108. Unequipped or not wearing protective equipment (hardhats, safety belts, etc.)
109. No warning signs or signs are blurred (eg protection against electric shock, falling objects, etc.)
110. Step on suspended or small diameter plastic and glass-lined pipes or use unsafe ascending facilities during maintenance
111. Damage to cables such as electric welders and manual power tools causes leakage, broken or broken
112. Blind entry into sewage pools, deep trenches, deep pool operations
113. Winter pipe racks are icy and slippery, no anti-skid measures
114. Installation of company welder without welding certificate or maintenance workers without relevant training
115. Working directly on the roof of fragile materials such as asbestos tiles and linoleum
116. When working at heights, no precautions were taken to cross work
117. When the work is carried out at a high position, the zero line of the welder is not connected to the welded position.
118. Areas with odors or toxic gases may not wear gas masks
119. When installing a high wall or digging a wall, there is no safety fence or safety net.
120. The dangerous materials cleared are scattered from the upper floors to the lower floors.
121. Manned by hoisting machinery
122. There is not enough lighting at night.
123. When there is strong wind or other bad weather above level 6, it is still working in the open air.
124. There is no more than two guards outside the kettle when working in the kettle.
125. During the overhaul of the kettle, there was no sign that cut off the power and hanged “someone overhauled, no closingâ€
126. The kettle was not effectively cleaned before entering the tank.
127. Before the tank operation, the concentration of combustible gas, oxygen content, and toxic gas (CO, H2S) concentration were not analyzed.
128. Before the tank is put into operation, the pipelines such as raw materials, solvents, steam, water and nitrogen are not reliably isolated.
129. During the overhaul process, no regular sampling analysis was carried out on the kettle.
130. The sign in the “canned person†is not attached to the obvious position outside the kettle.
131. “Double Inspection†was not performed when entering the tank operation
132. The lighting in the kettle does not meet the safety voltage standard. The voltage is greater than 24V in dry conditions and greater than 12V in wet conditions.
133. After the overhaul is completed, it will be turned on without checking and cleaning up the sundries.
134. Long-term operation in the kettle is not rotated
135. During maintenance, the necessary ventilation facilities are lacking in the kettle
136. Welding on the outer wall or inner wall of the glass jar
137. Enter the glass-lined kettle, the groove is not laid in the groove
138. Rapidly warming or rapidly cooling the glass kettle
139. When using a glass jar, the can or manhole bolts and clips fall into the kettle.
140. When using a glass-tank, stainless steel kettle, carbon steel kettle, the acid enters the kettle jacket
141. The selected materials are not subject to temperature, PH, corrosion solubility, and may be under pressure without special pressure review.
142. After the overhaul is completed, all the space in the kettle and the maintenance site have not been fully cleared and reviewed, and the trial operation has begun.
143. After the overhaul is completed, the relevant matters have not been fully communicated, the changes have not been confirmed and approved, and the relevant personnel have not fully trained and understood to take over.
144. Inspection and maintenance production without confirmation of operation
[eight] production process
145. There are sudden reactions, lack of response measures and training
146. Feel free to change the amount of feed or ratio of feed
147. Improved process or new process without safety assessment
148. Process changes have not been strictly reviewed and approved
149. The process operates within the limits of flammable gas explosion
150. When using highly toxic materials, use open operation
151. No technical procedures have been prepared for pilot production
152. The physical properties of the materials used and the precautions for safe use are not prepared.
153. When the material used is decomposed, the heat generated is not detailed.
154. The potential danger of dust explosions
155. When a certain raw and auxiliary materials cannot be put in time, there is danger when the materials in the kettle are temporarily stored.
156. The risk of spontaneous combustion or polymerization or decomposition of raw materials or intermediates during storage
157. Various parameters (temperature, pressure, etc.) in the process are close to the dangerous limit
158. Measures for rapid discharge of reactants in the event of an abnormal situation
159. There are no measures to prevent abrupt reactions and to stop abrupt reactions
Reactor, reactor
1) Reducer noise is abnormal
2) More oil on the reducer or frame
3) Reducer plastic blade hot melt deformation
4) Machine seal, reducer lack of oil
5) Gasket leakage
6) The anti-static grounding wire is damaged and not installed.
7) Safety valve has not been inspected, leaked, and no account has been established.
8) The thermometer has not been inspected and damaged
9) The pressure gauge has not been inspected, damaged or blocked by materials.
10) The key reaction kettle does not use double sets of temperature, pressure display, and record alarm
11) The rupture disc has not expired, leaked, and no account has been established.
12) The rupture disc under the valve is not open
13) There is an explosion hazard. The reactor is not equipped with rupture discs.
14) Abnormal pressure rise or flushing due to high temperature, agitation interruption, etc.
15) The bottom valve is easy to block when discharging
16) Acid corrosion in stainless steel or carbon steel kettle
17) Overload operation such as loading exceeding the specified limit
18) The enamel damage in the enamel kettle is still used in corrosive, flammable and explosive places.
19) The reactor liner is washed and damaged at the jacket steam inlet
20) Pressure vessel exceeds service life, manufacturing quality is poor, and it still leaks after repeated repairs
21) Pressure vessel has no nameplate
22) Missing number identification or unclear
23) Failure to effectively isolate reactors with explosive sensitivity
24) Important equipment does not have a safety checklist
25) Missing spare parts or spare equipment for important equipment
2. Storage tank, tank area, tank truck
1) The level gauge is blurred or damaged, blocked
2) The electrostatic ground wire is loose or not connected
3) Leakage at the flange gasket
4) The small platform and other high storage tanks are not effectively fixed
5) The safety liquid seal liquid level does not meet the requirements
6) Atmospheric pressure storage tank with pressure
7) The amount of charge exceeds the specified limit
8) Very warm storage tank without thermometer
9) The container is cracked and still in use
10) Frequently subjected to vacuum and nitrogen alternating load to damage the tank
11) Low boiling point solvent or liquefied gas storage tank is exposed to direct sunlight
12) There are collision risks such as transportation vehicles in outdoor storage tanks, etc.
13) The barrier hole in the dangerous goods tank area is not blocked
14) The dam of the hazardous chemical tank area is not tightly sealed, and the rainwater hole is arbitrarily opened.
15) The shut-off valve leading to the drain pipe is in an unsafe state such as normally open
16) The flammable or corrosive material outlet pipeline of the hazardous chemical tank area, the bracket is not provided with the lifting pressure spring compensation measure, or the flexible connecting short tube is directly used.
17) There are no warning signs for mobile phone, forbidden fire source, high speed limit, etc.
18) No leakage in the dangerous goods tank area, feeding operation record and daily inspection
19) The tractor enters the dangerous goods tank area at will
20) There is an open fire or mountain fire around the dangerous goods tank area
21) Dangerous goods tank operation room uses electric stove, electric tea kettle, electric heating plate, etc.
22) The tank truck has no grounding device at the loading and unloading point
23) There are no measures to prevent the operator from falling from the tanker
24) Unfitted effective flame arrester and unqualified condition (light damage or brake failure) tanker entering tank area
25) Safety accessories for tank tanks (pressure gauges, thermometers, safety valves) have no inspection date or are ineffective
26) The tank car body does not indicate the date of the next inspection of the pressure vessel
27) No static towline, anti-virus equipment or valve leak on the tank
28) Grounding is not allowed for more than 10 minutes before unloading and after unloading
29) When the tanker unloads, the driver and the escort leave the discharge site without on-site guardian
30) Open and spray discharge
31) Overfill the standard tank or full material when discharging
32) Leakage at the hose or flange when the vinyl chloride tanker is unloading
33) When the vinyl chloride is transported, it is full.
34) Transportation and unloading in the factory multiple times when the tank truck is not full
35) The unloading vehicle starts the vehicle in the middle of the flameout and hand brake or unloading
36) Engage in unloading operations when high-strength lightning and lightning strikes are frequent
37) There are no 2 grounding points for the tank (micro signal: mahoupao2009)
38) When loading and unloading gasoline and toluene, the operator did not wear anti-static overalls and anti-static shoes.
39) There is no accident cofferdam and emergency spray dilution facility in the storage area of ​​liquid ammonia and other storage tanks.
40) Emergency sprinkler and eyewash facilities are not available at the site
41) There is no material mishandling measures such as ethyl acetate loading into the gasoline tank
42) Standing on the gasoline barrel for electric welding
43) Cutting the petrol drum or welding tank without cleaning
44) Liquid ammonia, vinyl chloride storage tank overload
45) When the tanker unloads, block the fire passage and encroach on the road
46) The receiver leaves the unloading site
47) Use tools such as iron and plastic that are prone to sparks at the loading and unloading site
48) There is no operation record for the material storage tank sent to the workshop from the tank area.
3. Condenser, reboiler
1) Corrosion, gasket aging, etc. cause leakage
2) The temperature of the material after condensation is too high
3) The heat exchange medium layer is blocked by sludge and microorganisms
4) High temperature surface is not protected
5) When cooling high temperature liquid (such as 150 °C), the cooling water inlet and outlet valves are not open, or the cooling water is not enough.
6) When the evaporator is used for the first time, the evaporator is rapidly heated.
7) The heat exchanger does not take into account the anti-seismic measures, so that the connected pipe is loose and leaks due to vibration.
4. Pipes and fittings
1) After the pipeline is installed, the internal welding slag and other foreign materials are not cleaned.
2) The mirror glass is not clean or damaged
3) The pressure tube and temperature resistance of the optional tube material are not suitable, and the tube is improperly installed.
4) The cylinder is broken or used for a long time.
5) Anti-static grounding wire is damaged
6) Pipes, flanges or bolts are severely corroded and cracked
7) High temperature pipeline is not insulated
8) The squib is made into a bent pipe
9) Unidentified identification of pipe material and flow direction
10) The pipeline color code is unclear
11) Different materials are connected in series during commissioning.
12) Abandoned pipes are not cleaned up in time
13) Pipe valve installation position is low, easy to hit the head or difficult to operate
14) Protective measures are not taken for leaking parts such as corrosive material pipelines and flanges
15) The possibility of entering water, nitrogen, air, steam, etc. into the material pipeline
16) Iron drums or plastic buckets for placing flammable and explosive materials on high temperature pipes
17) Unreasonable material selection for pipes or fittings, easy to corrode
18) Glass tube level gauge has no protective measures
19) No protective metal mesh is installed at the mirror glass that may explode
20) Check valve cannot be flexibly operated or disabled
21) Electric valve power failure, pneumatic valve stop
22) There is no regular maintenance or disease operation using pressure pipes such as hydrogen.
23) Operators are untrained or undocumented when using pressure piping
24) Maintenance personnel are not qualified to repair and reform the pressure pipeline
25) Pressure pipe welding quality is inferior, there are welding defects such as undercut, air hole, slag inclusion, and incomplete penetration.
26) The pressure pipe is not in accordance with the regulations. Safety accessories or safety accessories are not verified.
27) Pressure pipelines have not been filed, operating procedures
28) Glass-lined pipes are struck by steel pipes, etc.
29) The existing pipeline valve is still used after the change of production process medium, and material adaptability is not considered.
30) The nitrogen tube is connected in series with the air tube
31) The brine pipe is connected in series with the cooling water pipe
5. Transfer pump, vacuum pump
1) Pump leakage
2) Abnormal noise
3) The coupling has no protective cover
4) The pump outlet is not equipped with a pressure gauge or check valve
5) The liquid in the pump and pipeline is not drained during long-term deactivation, causing corrosion or freezing
6) When the positive displacement pump is running, the outlet valve is closed or the safety return valve is not installed.
7) The inlet diameter of the pump is small or the pipeline is long or curved.
8) Centrifugal pump installation height is higher than suction height
9) Unused anti-static belt
6. Centrifuge
1) The solvent is filtered, the pipe is not filled with nitrogen or nitrogen, or there is no flow meter on site.
2) When the solvent is filtered in the centrifuge, the oxygen meter and alarm device are not installed.
3) Quickly brake or brake with auxiliary tools (such as iron bars)
4) The centrifuge is not effectively grounded
5) Anti-static belt is not used in the explosion-proof zone
6) When the centrifuge is running, the vibration is abnormal.
7. Double cone
1) No fence and safety interlock
2) Personnel climb into the double cone to replace the vacuum bag
3) Drive belt is unprotected
4) Shaft seal leakage
5) The vacuum line is blocked or the vacuum valve is not open when in use
8. Gas cylinder
1) The gas cylinder has no bottle cap and anti-vibration ring
2) When the hydrogen cylinder is transported and stored in summer, there is no shading measure, resulting in exposure.
3) Some cylinders exceed the annual inspection period
4) When the acetylene bottle is used together with the oxygen cylinder, the safety distance is less than five meters.
5) Close the hydrogen cylinder valve with a catalyst glove
6) Tap the collision cylinder
7) After the gas cylinder is used, the air pressure is less than 0.05Mpa
8) Gas cylinder group and pipeline connection, valve damage
9) When the hydrogen bottle is used, no anti-static device is used or it is broken.
10) Gas cylinders have no anti-fall measures
11) There are trenches and dark passages in the storage place.
12) The storage place is not ventilated or poorly ventilated or corrosive gas enters
13) Fire extinguishing equipment
14) The acetylene cylinder is used down
15) The color of the gas cylinder is ambiguous
[two] electrical instrumentation
1. Non-explosion-proof electrical appliances or control cabinets are not explosion-proof in the explosion-proof zone.
2. Damage to the window glass of the power distribution room
3. There are many sundries in the distribution room
4. There are steam water, material pipes, dust and corrosive substances in the power distribution room, which causes the electrical equipment inside the electric cabinet to age, resulting in short circuit accidents.
5. There is acid mist corrosion or solvent infiltration or dust on the outside of the transformer.
6. There are clothes and other debris behind the control cabinet or transformer cabinet
7. The power distribution cabinet is too old and prone to short circuit
8. The cable is close to the high temperature pipeline
9. Leakage of material pipes, sewage pipes, etc. around the overhead cable, causing corrosive materials to flow into the cable tray
10. Buried cables are subject to groundwater corrosion
11. Severe infiltration of sewage in cable wells and ditch
12. Cable tray is severely corroded
13. Cable wire protection sleeve ageing and breaking
14. Cables or steel pipes for laying electrical lines are not strictly blocked by non-combustible materials when passing through holes in walls or floors between different locations.
15. Pulling out the air to cause the cable connector to fall off and leak
16. The switch button corresponds to the device bit number and the identification is unclear.
17. There are messy cables in the workshop
18. Emergency lighting is not installed or is broken
19. Open motor without protective cover
20. Insufficient illumination at the operating site
21. The equipment is not matched with electricity (the calf dragging the cart, the old cow dragging the cart) to form electrical equipment, heat damage, fire
22. Flushing of electrical equipment and cable trays
23. Explosion-proof mirror light, lighting, ingot loose screws, light leakage
[three] static electricity
24. In flammable and explosive places, the reaction kettle, pipeline, storage tank, condenser, transfer pump, flange, valve are not grounded or the grounding is not bad.
25. In a flammable and explosive place, the powder hopper is not grounded and filled with nitrogen.
26. Delivering liquids such as gasoline, toluene, cyclohexane, etc. at a safe flow rate (v2<0.64/d)
27. The hydrogen flow rate is over 12m/s and the branch is over 8m/s.
28. Spray gasoline, etc. from a high position into the bottom of the tank or on the ground.
29. In the absence of nitrogen, aluminum isopropoxide, magnesium powder, etc. are put into the reaction kettle containing gasoline, toluene, etc. from the open funnel.
30. Wear undressing, shoes and hats and strenuous activities in flammable and explosive places
31. In a flammable and explosive place, scrub the equipment or the floor with a mop or rag of chemical fiber material.
32. Filling the plastic barrel with gasoline
33. Wash work clothes or mopping floor or steel platform, ground with solvents such as gasoline
34. The walls of stainless steel and carbon steel tanks are not grounded with welded steel bars or flat steel. More than 50m2 is not grounded.
35. There are places where flammable and explosive gases are emitted, and measures to eliminate static hazards such as humidification are not used.
36. Use plastic pipe to suck or charge toluene or recover toluene
37. Conveying or agitating gasoline with compressed air
38. Anti-static slippers are not used in the explosion-proof clean area
39. Grounded flat steel, roof lightning protection belt rust, serious corrosion
40. Metal equipment above the roof is not welded into the lightning protection zone
[four] production site
41. More storage materials or waste
42. On-site “run, run, drip, leakâ€
43. Damage to the insulation layer
44. Missing effective fence
45. Normally closed fire doors are normally open
46. ​​Operation posts with dust (magnesium powder, zinc powder, etc.) are not cleaned up in time
47. Metal sodium, sodium hydrogen storage, no rain protection measures or waste barrels, waste bags are stored freely
48. Blockage of fire exits or obstruction of various pipelines and their supports
49. Fire extinguishers lack or have expired rust or fire hoses, fire hydrants do not meet fire protection requirements
50. There are multiple labels in the waste bin
51. Strong oxidants (hydrogen peroxide, potassium permanganate, etc.) are stacked on wooden shelves
52. The steel platform is too large
53. Steel platform or steel column is seriously corroded
54. Local area solvent concentration exceeds the standard
55. High position valve handles, iron bars, etc. are easy to fall
56. Large concrete floor vibration
57. Outdoor steel shed or roof debris
58. Anti-virus equipment expires or expires
59. Non-production equipment (food, newspapers, novels) is stored at the production site.
60. Lack of summer heatstroke cooling facilities
61. Outdoor small diameter pipe is not insulated in winter
62. There are no emergency showers, eye washes, etc. in the workshop or it is damaged.
63. The vehicle is not equipped with a flame arrester and enters the production site.
64. Inflammable and explosive places are not equipped with flammable gas alarms or malfunctions
65. Reactor, tank, pump, etc. unlabeled equipment number and name
66. The large iron gate does not have a fixed bolt. Once the wind is strong, it may cause the iron door to spark, causing danger.
67. The threshold of the warehouse is low, and in the event of an accident, dangerous goods will overflow.
68. Ground storage of iron plates and steel pipes at the production site
[five] personnel, on-site operation
69. No job operation records or operational records are incomplete
70. Absorbing, filling, and handling corrosive items without protective equipment
71. There are phenomena such as the absence of operators, leaving the post, sleeping, etc.
72. Dust masks are not worn in powder feeding positions
73. Quick switching valve
74. The stratified kettle and the bottom valve of the tank are not closed after stratification
75. The stratified kettle and tank water valve are too large, causing the oil in the water to be discharged into the sewage pool or the drainage time is too long.
76. Place the air in the high temperature kettle and the tower.
77. Extraction catalysts (such as palladium carbon, active nickel, etc.) are scattered more on site.
78. Use iron rods to smash pipes, block materials in the kettle or use sparks to create sparks
79. Noise-free environment without ear protectors or earplugs
80. Tank overpressure
81. Using flammable and explosive solvents such as gasoline and toluene, the tank and tank are not replaced by nitrogen.
82. Dust, poor ventilation or lack of oxygen
83. Pressure on the reactor cover
84. Employees have occupational taboos or allergies or exposure to poisons for too long
85. Emergency valves or emergency switches are not easy to operate
86. Wear nail shoes or high heels, sandals in flammable and explosive places
[six] civil engineering
87. There are no precautions (such as flame retardant blockage) on the upper and lower floor pipe wells where fire spread may occur.
88. Explosion-proof processes do not use explosion-proof walls and lightweight roofs or do not consider adequate venting surfaces
89. The number of entrances and exits and emergency passages is not designed or blocked or marked.
90. The foundation of the plant has been corroded by acids and alkalis, and the columns and beams have been damaged seriously.
91. When there is strong wind, the steel window glass is easy to fall off
92. The stairs are too narrow or steep
93. Poor indoor drainage or long-term accumulation of water and oil in low-lying areas
94. There is not enough space in the passage or work area, overhead and ceiling
95. Excavate the road at will in the case of unknown underground pipelines (water pipes, cables, etc.)
96. Using large machinery to dig underground near underground cables, pipes, etc.
97. When the fire broke out in the fire-prohibited area, the production workshop was not sent for supervision.
98. Abnormal conditions (pipe breakage, leakage, etc.) occurred during construction, and no immediate shutdown for emergency treatment
99. Ditches, pits, pools, etc., and damaged pipes, without fences and signs, no illumination at night
100. When the soil is found to be likely to collapse or slide, the operation is not stopped.
101. Measures to prevent underground empty tanks and empty pools from floating up
102. When working in the lower tank or the lower pool, the corresponding approval procedures have not been completed or the approval requirements have not been complied with (such as labor insurance supplies, guardian implementation, etc.), and the precautionary measures are not in place.
103. In the case of non-constructive construction, the “non-infrastructure employment procedures†were not processed or the corresponding risks were not known before the operation, and the safety measures were not in place.
[seven] production maintenance
104. In the event of cleaning and overhaul in the container, there is a dangerous situation and there is no emergency escape facility or measure.
105. No fire guards or guardians are served by new employees or in violation of regulations
106. Overload lifting
107. Tools or hanging objects are not properly fixed
108. Unequipped or not wearing protective equipment (hardhats, safety belts, etc.)
109. No warning signs or signs are blurred (eg protection against electric shock, falling objects, etc.)
110. Step on suspended or small diameter plastic and glass-lined pipes or use unsafe ascending facilities during maintenance
111. Damage to cables such as electric welders and manual power tools causes leakage, broken or broken
112. Blind entry into sewage pools, deep trenches, deep pool operations
113. Winter pipe racks are icy and slippery, no anti-skid measures
114. Installation of company welder without welding certificate or maintenance workers without relevant training
115. Working directly on the roof of fragile materials such as asbestos tiles and linoleum
116. When working at heights, no precautions were taken to cross work
117. When the work is carried out at a high position, the zero line of the welder is not connected to the welded position.
118. Areas with odors or toxic gases may not wear gas masks
119. When installing a high wall or digging a wall, there is no safety fence or safety net.
120. The dangerous materials cleared are scattered from the upper floors to the lower floors.
121. Manned by hoisting machinery
122. There is not enough lighting at night.
123. When there is strong wind or other bad weather above level 6, it is still working in the open air.
124. There is no more than two guards outside the kettle when working in the kettle.
125. During the overhaul of the kettle, there was no sign that cut off the power and hanged “someone overhauled, no closingâ€
126. The kettle was not effectively cleaned before entering the tank.
127. Before the tank operation, the concentration of combustible gas, oxygen content, and toxic gas (CO, H2S) concentration were not analyzed.
128. Before the tank is put into operation, the pipelines such as raw materials, solvents, steam, water and nitrogen are not reliably isolated.
129. During the overhaul process, no regular sampling analysis was carried out on the kettle.
130. The sign in the “canned person†is not attached to the obvious position outside the kettle.
131. “Double Inspection†was not performed when entering the tank operation
132. The lighting in the kettle does not meet the safety voltage standard. The voltage is greater than 24V in dry conditions and greater than 12V in wet conditions.
133. After the overhaul is completed, it will be turned on without checking and cleaning up the sundries.
134. Long-term operation in the kettle is not rotated
135. During maintenance, the necessary ventilation facilities are lacking in the kettle
136. Welding on the outer wall or inner wall of the glass jar
137. Enter the glass-lined kettle, the groove is not laid in the groove
138. Rapidly warming or rapidly cooling the glass kettle
139. When using a glass jar, the can or manhole bolts and clips fall into the kettle.
140. When using a glass-tank, stainless steel kettle, carbon steel kettle, the acid enters the kettle jacket
141. The selected materials are not subject to temperature, PH, corrosion solubility, and may be under pressure without special pressure review.
142. After the overhaul is completed, all the space in the kettle and the maintenance site have not been fully cleared and reviewed, and the trial operation has begun.
143. After the overhaul is completed, the relevant matters have not been fully communicated, the changes have not been confirmed and approved, and the relevant personnel have not fully trained and understood to take over.
144. Inspection and maintenance production without confirmation of operation
[eight] production process
145. There are sudden reactions, lack of response measures and training
146. Feel free to change the amount of feed or ratio of feed
147. Improved process or new process without safety assessment
148. Process changes have not been strictly reviewed and approved
149. The process operates within the limits of flammable gas explosion
150. When using highly toxic materials, use open operation
151. No technical procedures have been prepared for pilot production
152. The physical properties of the materials used and the precautions for safe use are not prepared.
153. When the material used is decomposed, the heat generated is not detailed.
154. The potential danger of dust explosions
155. When a certain raw and auxiliary materials cannot be put in time, there is danger when the materials in the kettle are temporarily stored.
156. The risk of spontaneous combustion or polymerization or decomposition of raw materials or intermediates during storage
157. Various parameters (temperature, pressure, etc.) in the process are close to the dangerous limit
158. Measures for rapid discharge of reactants in the event of an abnormal situation
159. There are no measures to prevent abrupt reactions and to stop abrupt reactions
Kaysen Steel is a manufacturer and supplier of sanitary tank bottom valve, which is used extensively in the tanks and vessels for pharmaceutical, biological, and food industries. This series includes tank bottom diaphragm valves, tank bottom seat valves, elbow-type tank bottom valves, etc , the shape is like a [Y". 2″ and 2-1/2″ y-types tank bottom seat valve is our commonly size, the material could be SS304 or SS316L stainless steel.
Strength:
Material of stainless steel 304,316L or en.1.4301, 1.4404 is from reputed mill to guarantee the chemical composition and mechanical propertis. Material certificate will be submitted to orders.
Forged /investment casting valve body and disc to control the leakage and visual well.
Superior facilities and good experiences for fabrication.
Fast delivery time is possible to meet your needs well in time.
Low cost from bulk production will reduce your budget and improve your business.
Small quantity available.
Quality & Inspection:
PMI test to verify material grade
Dimension controlling during fabricating and finished
Visual and surface 100% examination before shipment
Packed in carton box firstly, then in wooden case
Third party inspection available.
Sanitary Tank Bottom Valves,Food Grade Tank Bottom Valves,Hygienic Tank Bottom Valves
Kaysen Steel Industry Co., Ltd. , https://www.chinasanitaryvalve.com