Some standard content:
[CS 71. 100. 20
Machinery Industry Standard of the People's Republic of China
JB/T 8856—2001
Dissolved acetylene aystems
2001-05-23 Issued
China Machinery Industry Federation
2001-10-01 Implementation
JB/T88562001
Cited standards
3 Terms
4 Medical strength classification and product classification
5 Technical requirements
Test methods
7 Inspection regulations
8 Marking, packaging, transportation and storage
Appendix A (Appendix to the standard) Determination of water content in acetylene glycol (reclassified) 11
JB/T8856-2001
This standard is a revision and merger of JB/T8856.1-1999 "Technical conditions for acetylene dissolving equipment" and JBT8856.2-1999 "Performance test methods for acetylene dissolving equipment." Compared with JB/T8856.1-1999 and JB/T8856.2-1999, this standard has the following main technical contents: 5.2, 5.3, 3.5.2, 5.5.17, 5.5.3.1, 5.12, etc. are added in the standard. The test method and inspection rules in Chapter 6 are changed from the third and fourth chapters of JB/T8856.2-1999, and 7.1.2 and 7.1.3 are added. At the same time, Articles 6.1 and 6.2 of the test method and inspection rules in Chapter 6 of JB/T8856.1-1999 are cancelled. The contents of some articles in the original standard are modified, and the article numbers are changed accordingly. This standard replaces JB/T8856.1-1999 and JB/T8855.2-19 from the date of implementation. Appendix A of this standard is the appendix of the member standard.
This standard was proposed and managed by the Standardization Technical Committee of Gas Separation and Filtration Equipment for Mechanical Industry. The originating unit of this standard: China Air Separation Equipment Corporation. The main authors of this standard: Ji Qi, Hu Shuiyun, Luo Meicheng. This standard was first issued in October 1990 as ZBJ76020-1990 and 2B176021-1990, and the standard number was adjusted to JB/T8856.1-1999 and 188856.2-1999 in April 1999. This is the first revision. 【Scope
Machinery Industry Standard of the People's Republic of China
Dissolved acetylene equipment
Dkssplved aeelylene systems
JR/T 8856-200!
Replacement JB8856.1[999
JR/T.8R16.2——1920
This standard specifies the terminology, pressure classification and product classification, technical requirements, test methods, inspection and marking, packaging, transportation and treatment of dissolved acetylene equipment.
This standard is applicable to dissolved acetylene equipment that uses calcium carbide as raw material to produce dissolved acetylene with an output of less than or greater than 10m\h, and acetylene equipment that transports acetylene through pipelines. This standard 4 is used for block equipment in petrochemical process flow and special decision-making equipment in national defense, railway and shipping systems. 2 Cited standards
The provisions contained in the following standards constitute the text of this standard through citation in this standard. When this standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB 150—1998
GRGR19—1996
GA81631987
GA 500311991
GA50958---1992
GR 502351997
GH161995
G0/T4980—1985
GBrT 78991987
GH133061551
GB/113384---992
JB 4730--1994
JH/[4735-1997
JB/T9103.1-1999
JB/T9103.2-19
Manufacture of positive pressure vessels
Energy dissolving blocks
Keyless steel pipes for conveying fluids
Design specifications for power stations
Design specifications for power installations in explosive and fire hazardous environments1 Industry Jinming pipeline1 Engineering and acceptance regulations
Fire protection design code
Determination of noise and sound power levels of positive displacement compressors Engineering methods for welding, cutting and similar process gases Bottle pressure reducer label
General technical parts for packaging of electromechanical products
Pressure vessel cleaning test
Steel welded wide positive container
Technical conditions for reciprocating piston compressor
Performance test of Renyou piston compressor (Safety Supervision Regulations for Dissolving Gas Cylinders) 3 Technical Spectrum
3.1 Continuous gas production (output)bZxz.net
Continuous gas production refers to the working cycle under normal conditions, including the charging and deslagging time, which is not less than h. An acetylene signing machine is approved by China Machinery Industry Federation on May 23, 2001 and approved on October 1, 2001 Implementation
Average hourly gas production
3.4 Decomposition explosion
JE/T8856--2001
After decomposition or combustion, the flame formed spreads to the unreacted gas side at a speed lower than the speed of sound, which is called decomposition explosion. The pressure produced by decomposition explosion can reach 9-7 times the pressure. 3.3 Explosion
The flame formed during decomposition or combustion of acetylene continues to spread to the unreacted gas side at a speed higher than the speed of sound (sometimes often times the speed of sound), which is called explosion. The pressure after the explosion can be as high as dozens of times or more than the initial pressure. 3.4 Maximum allowable pressure
The maximum pressure (test pressure) that the acetylene decomposition equipment is allowed to withstand when it is installed, which is the maximum allowable pressure. 3.5 Maximum operating pressure
The maximum operating pressure that the acetylene decomposition equipment is allowed to reach when it is working. 3.6 Working pressure
The pressure of acetylene dissolving equipment during normal operation. The working pressure shall not exceed 0.91 times the maximum working pressure. 3.7 Temporary pipeline
The internal connection of each unit of acetylene dissolving equipment, including the equipment's blow-off pipe, argon discharge pipe and cooler. It does not include the acetylene pipelines connecting between equipment and factory rooms. 3.8 Design service life
When designing acetylene dissolving equipment, the service life should be determined according to the corrosion of the medium material and related factors. 4 Pressure classification and product classification
4.1 Pressure classification
Each system in acetylene dissolving equipment is divided into a level according to the different working pressures it withstands: Low pressure: less than or equal to 0.02MPa; Medium pressure: greater than 0.02MPa; less than or equal to 0.15MPa; High pressure: greater than 0.1SMPa.
4.2 Product classification
According to the working pressure of acetylene generator, acetylene dissolving equipment can be divided into two categories: low pressure and medium pressure: low pressure dissolving equipment, the working pressure of acetylene generator is less than or equal to 1.0MPa; medium pressure dissolving equipment, the working pressure of acetylene generator is greater than 0.02MPa and less than or equal to 0.15MPa. 5 Technical requirements 5.1 The performance indicators of the explosive device shall be as specified in Table 1. 5.2 Design calculation positive force The explosive device must be calculated according to the maximum allowable stress as the calculated pressure. The dissolved acetylene equipment for water filling test shall be calculated according to the maximum working pressure, and additional factors (such as standard water, wind, ladder, etc.) shall be considered for design calculation. 5.3 Allowable stress When the high allowable pressure of the compressed parts is used as the calculated stress, the allowable stress of the compressed parts material shall be less than or equal to 90% of the material service point. Acetate production Block surface Degree of explosive device Measured by explosive device Nasal erosion Rat Silicosis Blood Silica 7. Whether the explosive device has water content Accuracy of explosive device Reliability and effectiveness JB/T B856--2001
dB/ (A)
Note: Output change caution: Overweight 20℃: Pressure 101325P, 54 Material
People or equal to the design value
10% aldehyde resistance test paper unchanged package
54.1 The materials used to manufacture the equipment must be able to withstand mechanical, chemical and thermal loads. The materials in contact with acetylene, carbide slag and purifiers must not produce dust-generating dangerous chemical reactions. 5.4.2 Except 5.4.4-5.4.8. In addition, the following materials shall not be used for parts in contact with acetylene: 8) copper and copper alloys with a content of more than 70%; b) silver and silver alloys;
aluminum, copper and its alloys that are in contact with unpurified blocks containing or containing nitrogen; glass and glass products
C cast iron with low grade HI5U.
5.4.3 The materials of sealing rings, seals, thin parts and other parts in contact with acetone or other solvents must have the performance of being resistant to acetone or other solvents.
5.4.4 Copper alloys shall not be used for filters, grids and other parts that have a large area in contact with acetone, including copper alloys with a content of less than 70% of steel.
Zinc can be used for mirrors with anti-wear surfaces.
5.4.6 The width of the pin weld in contact with acetone shall not exceed 0.3mm, and solder with a silver content of less than 41% and a copper content of less than 20% can be used. Glass picking instruments are allowed to use sight glasses, pressure gauges, U-shaped pressure gauges, etc. of low and medium pressure equipment. 5.4.7
5.4.8 Aluminum pads can be used for the generator and feeding system: 5.5 Structure
5.5.1 Fast generator
5.5.1.1 Acetylene generator and feeding system should be installed in the gas replacement device, and ensure that all spaces in the container can be completely cleaned. The water adding system should be equipped with an air removal device.
5.5.1.2 When designing the calcium carbide water-type low-pressure acetylene generator, it should be ensured that the temperature and pressure shall not exceed the specified value even when the production reaches 200% of the continuous gas production during decomposition.
5.5.1.3 Allowable operating temperature of the gas generator: 1) The water temperature of the carbide water-injected low-pressure generator shall not exceed: JB/T 8856—20+1
2) The gas overflow at the outlet of the water-injected medium-pressure generator shall not exceed %; 3) The temperature of the gas generator should be measured by a bimetallic thermometer, and the diameter of the dial should be greater than or equal to 100mm. 5.5.1.4 The design of the gas generator and its associated equipment should take into account the risk of water leakage, or be equipped with corresponding condensate collection and discharge devices, and it should be convenient for gas exchange.
5.51.5 When the gas generator is in operation: keep it sealed at high operating pressure, and there should be no leakage. 5.5.1.6 The slag discharge device should meet the following requirements: a) The slag discharge device must be able to discharge the carbide slag slurry and the carbide slag in a smooth manner. The automatic control measures in the acetylene generator should have measures to prevent pressure buildup and flashover:
b) The surface of the discharge arm should be able to smoothly discharge the maximum allowable tensile strength of calcium carbide or ferrosilicon designed by the acetylene generator. The water-injected medium-pressure generator must be able to safely discharge the electric charge from the generator through the use of expansion and other suitable structures;) The voltage supply of the generator must be connected to the outdoors. 5.5.1.7 The medium-pressure acetylene generator adopts a quick-opening door. When designing, a safety interlock device should be installed and have the following functions: a) When the quick-opening door reaches the predetermined closing position, the pressure can be increased and the interlocking control function can be achieved: b) When the internal pressure of the generator is completely depressurized, the quick-opening door can be opened for charging only after the safety interlocking device is disengaged;) It has the interlocking function that is synchronized with the above-mentioned actions. 5.5.1.8 Accessories
5.5.1.8.1 The performance requirements of the positive limit device shall comply with the provisions of 5, 7.3 and 5.7.6. 5.5.1.8.2 The pressure indicator used in the low-pressure generator is suitable for any structural form of stop gauge. The split U-shaped pressure gauge shall be equipped with a protective cover to prevent external damage. The pressure indicator of the medium-pressure generator shall use a special pressure gauge. The measuring range of the positive gauge shall be 1.3 times the maximum operating pressure.
5.5.1.8.3 The safety water seal in the generating system shall comply with the provisions of 5.7.4. 5.5.1.9 The pipes and valves of the generating service shall meet the provisions of 5.11.6. 5.5.1.10 After installation, the generator shall be tested for continuous gas production (production), pressure, gas absorption, water leakage, and performance. 5.5.2 Acetylene coolers, separators, scrubbers, purifiers, and dehumidifiers 5.5.1.1 When the coolant, purifier, and desiccant used in acetylene coolers, separators, scrubbers, purifiers, and desiccant come into contact with acetylene or other impurities under operating conditions, no hazardous chemical reaction shall occur. 5.5.1.2 Acetylene purifiers and dehumidifiers must be equipped with a separate gas replacement system to facilitate the complete replacement of air or mixed gas when replacing the purifier and dehumidifier.
5.5.1.3 The effective pressure relief area of the ruptured fragments of medium-pressure acetylene dissolving equipment and the static bursting pressure of the ruptured fragments shall comply with the provisions of 5.7.7.1, and the installation requirements shall comply with the provisions of 5.7.7.3.
5.5.2.4 For high-pressure acetylene equipment that will not form empty volume due to the downward flow of fillers, and equipment that is unlikely to vibrate during operation, it is not necessary to set a dehumidifier during design.
5.5.1.5 For equipment that does not meet the requirements of 5.5.2.4 and may explode during operation, a bursting disc shall be installed. The technical requirements of the disc shall comply with the provisions of 5.1.7.2, the installation requirements shall comply with the provisions of 5.7.73, and the unit volume of the equipment must be less than 40L, and the inner diameter of the container must be less than 200mm
5.5.3 Gas storage tank
5.5.31 The volume of the low-pressure gas storage tank shall be as small as possible under the conditions of meeting the equipment technology, and shall be connected with the material loading and unloading of the gas generator
and the gas fast-pressure transmission period control alarm. JE/T 8856-2001
5532 Wet gas storage tanks with a height of 20m and above shall be equipped with a quick cut-off device (quick cut-off valve) to prevent accidents and a gas-tightening plate.
5.53.3 The components of the moving parts of the low-pressure wet gas storage tank should not be connected to magnets during operation and should not cause sparks. 5.5.3.4 The maximum cooling and antifreeze capacity of the low-pressure wet gas storage tank should be determined according to the use environment. 5.5.3.5 The volume of the medium-pressure gas tank is generally not more than 2m3. 5.5.3. The bursting disc of the medium-pressure gas tank shall be determined according to the volume of the medium-pressure gas storage tank. When the volume of the gas tank is less than or equal to 2m3, the effective area of the bursting disc shall be at least 0.05m3 (equivalent to a circular bursting disc with a diameter of 250mm). When the volume of the gas tank is greater than 2m3, the discharge area of the bursting disc and the static explosion and melting pressure of the bursting disc shall be in accordance with the provisions of 5.7.1, and the installation requirements shall be in accordance with the provisions of 5.7.7.3. 5.5.3. The inner and outer walls of the acetylene gas tank shall be treated to prevent corrosion. 5.5.3.8 The acetylene gas storage tank must be equipped with a pressure indicator and a capacity indicator. 54 Acetylene compressor
Acetylene compressors shall comply with the provisions of BT9103.1. When designing or selecting acetylene compressors, the following requirements must be met: 5.5.4.1 The cooling system of the acetylene compressor must ensure that there will be no temperature reaction that causes acetylene decomposition under normal working conditions. For acetylene compressors lubricated with oil, the cylinder gas maximum pressure temperature (calculated) shall not exceed 140%. 5.4.2 The discharge flow of the acetylene compressor safety valve must be greater than or equal to the rated flow of the compressor. The acetylene discharged from the safety valve shall be discharged to the outdoor air.
5.54.3 The pressure of cooling water (liquid) of acetylene compressor shall be lower than the pressure of acetylene gas in the cooled parts. The cooler shall use open water model. 5.5.4.4 Each stage of acetylene compressor shall have at least one pressure gauge (the dial diameter shall be greater than or equal to 100mm) or other pressure measuring device. Its measuring range shall be adapted to the measured value. A special acetylene pressure gauge or pressure measuring device shall be used. A throttling device (such as a diameter of 100mm or more) shall be installed at the connection with the pressure gauge or pressure measuring device. m cut, hidden surface is not more than 0.1mm throttling orifice plate] or throttling gasket (such as bed surface width, etc.
5.5.4.5 The belt-driven compressor must use a special belt that conducts static electricity. 5.5.4.6 In addition to the control button, the motor of the compressor must also be equipped with a power cut-off switch (safety switch), and its explosion-proof level should comply with the provisions of 5.9.3.
5.5.4.7 The compressor must be equipped with a negative pressure and ultra-high pressure limiting alarm device, pressure alarm The device shall meet the following requirements: a) When the suction pressure is lower than the set minimum pressure, it can automatically stop and alarm; b) When the discharge pressure reaches the set maximum pressure, it can automatically stop and alarm. 5.5.5 Acetylene filling and cooling equipment
5.5.1 Each group of filling and cooling equipment shall be equipped with a spray cooling device for cooling acetylene bottles. The spray cooling device shall have a sufficient spray range to ensure that all gas cylinders are sprayed.
5.5.2 A main interception device shall be installed on the inlet of each row of the filling and cooling equipment. 5.5.5.3 A flame arrester must be installed before the filling main shut-off device. A flame arrester must be installed after the shut-off valve of the filling and discharging distribution interface (before the flexible connection port of the gas cylinder).
5.5.5.4 At least one positive pressure gauge is installed on each group of filling pipes, and the dial diameter should be greater than or equal to 100mm5.5.5.5 Each group of full-filling pipes shall be provided with a return flow device to the gas cabinet. A flame arrester shall be provided on the intermediate pipes, regardless of the high-pressure part or the low-pressure part.
JET 8856-2001
5.5.5.6 The pipes and valves of the full-filling pipes shall comply with the requirements of 5.6.1. The length of the pipes shall not exceed 6m. 5.5.6 Block bus
5.5.6.1 The high-pressure guide (main pipe) of the bus shall be equipped with a general stop valve. A condensate check valve shall be provided at the connection between the guide and the gas cylinder. 5.5.6.1 A quick closing device shall be provided on the high-pressure pipeline before the pressure reducer of the bus. It can automatically cut off the gas source when the quick decomposition occurs. The device can also be a high-pressure flame arrester that can cut off the gas source. 5.3.6.3 A medium-pressure flame arrester shall be provided on the medium-pressure pipeline after the main pressure reducer. For pipeline centralized gas supply devices, if medium-pressure water seals are installed, flame arresters may not be installed.
5.5.6.4 A stop valve should be installed after the main pressure reducer. 5.5.6. Install a safety net on the medium-pressure needle channel after the main pressure reducer. 5.6 Pipelines and accessories
5.6.1 There shall be no obstacles that affect the safety function in the discharge port after the safety device. 5.6.2 Medium pressure pipeline
5.6.2.1 The maximum operating pressure of the medium pressure pipeline of the dissolving block equipment shall not exceed the provisions of Table 2 according to different diameters. Table 2
Nominal diameter
Maximum working pressure
5.6.2.2 The medium pressure pipeline shall be configured according to the following pressures: 60
a) When the working pressure is less than 0.04MPa, the nominal pressure of the valve is 1.0MPa. 70
h) When the working force is greater than 0.04 MP and less than or equal to 0.15MP=: the nominal pressure of the same door is 1.6MPa: 5.6.3 High-pressure pipeline
5.6.31 The operating pressure of the high-pressure equipment pipeline is 2.5MPs, and the operating pressure is less than or equal to 3MPac80
5.6.3.2 When the operating pressure of the high-pressure equipment pipeline is less than or equal to 1.2MPa, the maximum inner diameter is less than or equal to 25mm; when the operating pressure is greater than 1.2MPa: the maximum inner diameter of the pipeline is less than or equal to 20mm. 5.6.3.3 High-pressure pipelines shall be made of 20# non-ferrous steel in accordance with GB/8163, and shall be supplied in normalized state and with material certificates. 5.6.3.4 When the commercial-pressure pipeline is selected according to the materials specified in 5.63.3, the relationship between the pipe wall thickness 5 (mm) and the pipe inner diameter a (mm) shall be calculated according to formula (1):
5.6.3.5 If the pipe diameter at the end of the pipeline is not small, it must be reinforced within a certain length of the pipeline. The length of the reinforcement should be 2.5 times the lower pipe diameter. The thickness of the pipe wall after reinforcement shall be at least 0.35 times the nominal diameter (inner diameter). If the thickness of the entire pipeline length is greater than or equal to 0.3 times the nominal diameter, the above-mentioned reinforcement can be omitted. 5.6.3.6 High-pressure pipes must be equipped with valves with a pressure rating of 25MPa or equivalent to a valve body that can withstand a test pressure of 35 times the high working pressure (the valve body does not deform after the test) and a valve with at least 4MPa sealing force. 5.6.3. Acetylene high-pressure hoses must be resistant to corrosion by acetylene solvents, and their inner diameter should be less than or equal to 6mm. High-pressure hoses must be able to withstand a pressure test greater than or equal to 60MPa.
5.6.3.8 The resistance value between the two joints of the high-pressure hose shall not exceed 10.6
5.6.3.9 High-pressure pipes are not allowed to use external threaded connections. JB/T8856-2001
5.6.4 The connection and reverse connection between pipelines must be sealed and should be in the form of welding flanges, welding joints, and ferrule joints, and must be able to withstand the test pressure of the corresponding pipelines. 5.6,5 The surface of the pipeline must be covered with anti-tumor protection. 5.6.6 For any pipeline that has wet gas flowing through it, a drainage device shall be installed at the lowest position of the pipeline and anti-freeze protection shall be provided. 5.6.7 A pressure gauge or pressure indicator shall be installed at the end of the pipeline after the compressor or instrument, and the true diameter of the dial shall be greater than or equal to 100in.
5.6 In medium and high pressure pipes and the connected equipment, fire extinguishers shall be installed at the parts that may cause fire or decomposition explosion. The design of the fire barrier of the piping system shall comply with the provisions of GB50031. 5.7 Safety devices
5.7.1 Gas pressure reducer shall be in accordance with the provisions of CB 7899. 5.7.1 Main pressure reducer (pipeline pressure reducer)
5.7.2.1 The outer shell and the agent shell of the main pressure reducer must ensure that they will not rupture under the following circumstances when the pressure reducer decomposes and explodes: a) When the pressure on the inlet side is 2.5MP, the flow rate is small and the discharge pressure reaches the maximum: h) When the pressure on the exhaust side is 1.4 times the maximum discharge pressure [absolute pressure: 5.7.2.2 The inlet side (high-pressure end) of the pressure reducer shell shall be subjected to a pressure resistance test of 20 times the maximum working pressure, and the exhaust side (low-pressure end) shall be subjected to a pressure resistance test of 6MP. The body shall not be deformed after the pressure resistance test. 5.7.3 Low-pressure water seal (low-pressure limiting device) Low-pressure water seal must have the following performance requirements: 1) The pressure-limiting water seal must be able to ensure that the pressure of each container and pipeline in the low-pressure generator system does not exceed the maximum working pressure. When the maximum working pressure is reached, it can be effectively discharged to the outside: b) The discharge volume of the low-pressure water seal must be smaller than the gas production plate of the dust generator: 1) The area of the air flow channel at any part of the pressure-limiting water seal should be larger than the cross-sectional area of the generator outlet pipe. 9.7.4 Safety water seal
5.7.4.1 The safety water seal must have the following performance requirements: 1) When the pressure behind the safety water seal is too high or backfires, the accumulated high-pressure gas can be discharged from the discharge pipe; 2) The flow rate of the full water seal discharge pipe should be greater than 150% of the continuous gas production plate of the generator; 3) The water seal height and water capacity of the safety water seal ensure that the generator plays an effective sealing role under various working conditions and can ensure the limited water level.
5.7.4.2 When the gas flow rate of the generator reaches 1.1 times of the maximum flow rate, the sealing liquid in the safety water seal will not be carried out of the safety water seal by the gas.
5., 4.3 When the pressure of the low-pressure safety water seal is the maximum working pressure and the pressure of the medium-pressure safety water seal is 0.1MFs, a static fire test is performed when a mixture of 15% (volume) acetonitrile and 85% (volume) air is passed, or in the above case, a dynamic tempering test is performed when 0.2 times the maximum flow rate passes, and tempering should be uniformly prevented. After the tempering test, the outer shell of the safety water seal is not allowed to deform and affect its function.
5.7.4.4 The low-pressure safety water seal can withstand a pressure resistance test of at least 0.375MPa, and the medium-pressure safety water seal can withstand a pressure resistance test of at least 2.4MPa.
5. Flame arrester
5.7.5.1 High-pressure fire arrester for equipment and fiber duct (JB Hall 8856-2001)
) The fire arrester group must ensure that when the maximum working pressure is reached at the air inlet or exhaust end, if decomposition explosion occurs, it can safely extinguish the fire;
h) The fire arrester must ensure that when the initial pressure of the acetylene is 2.5MP and coal-seismic acetylene decomposition occurs, its shell will not be deformed. That is, the shell of the fire arrester group can withstand a pressure strength test of at least 50 times the maximum working pressure:) If the outer filling of the flame arrester is required to be replaced after one decomposition, the design requirement of 5.7.5.16 can be ignored, but it must be ensured that when the pressure is 2.5, such as when the explosive acetylene decomposes, its outer filling does not burn or the shell of the flame arrester can withstand a pressure strength test of at least 35 times the maximum working pressure;
d) The gas pressure loss of the high-pressure flame arrester shall not exceed 0.03MPa at the maximum flow rate. 5.7.5.2 Medium-pressure flame arrester
) The medium-pressure flame arrester shall have the function of alternating with the central safety water seal specified in 5.7.4.3, and the outer barrier of the medium-pressure flame arrester can withstand a pressure strength test of at least 6MP.
b) The medium-pressure flame arrester should be equipped with an automatic gas source cut-off device (temperature control or gas control one-way valve). Once the burning gas returns to the flame arrester, the flame arrester will automatically cut off the gas source before the combustion on the intake side. 5.5.3 Backfire prevention group for medium-pressure flame arresters and gas cylinders According to relevant regulations, 5.7.6 Safety valve
5.7.1 Safety valve for medium-pressure generator (medium-pressure pressure limiting device) The safety valve should be able to prevent the pressure of the medium-pressure generator from exceeding 0.15MPa. When the pressure reaches 0.13MPa, the safety valve should be opened; when the pressure reaches 0.15MPa, the discharge of the safety valve shall not be less than the continuous gas production of the generator: the medium-pressure pipe safety valve should have the same function as the medium-pressure generator safety valve: when the pipe diameter of the medium-pressure generator is less than or equal to 50mm, the safety valve of the medium-pressure generator can also be used as the safety valve of the medium-pressure pipe. 5.7.6.2 Safety valves for gas cylinder groups and manifolds) The safety valves must open when the pressure in the distribution branch reaches 1.0-1.3 times the working pressure of the high pressure, and open when the pressure is 1.3~1.6 times, the discharge reaches the rated value. The rated discharge of the safety valve should be greater than or equal to half of the rated flow of the pressure reducer. When the maximum working pressure is reduced, the safety valve must be able to close tightly again. b) The safety valve is allowed to be directly installed on the main pressure reducing instrument, but its performance must comply with the provisions of 5.7.6.2a). 5.7. 7 Bursting disc
5.7.7.1 The requirements for bursting discs of medium-pressure fastening equipment are as follows; a) The effective pressure relief area of the bursting disc is calculated by formula (2): Fa0.03
Where: F-effective pressure relief area of the bursting disc, m\: V.: The volume of the free space in the container, m. 21
b) The area of the medium-pressure rupture disc should also take into account the amount of gas produced. When the continuous gas production of the generator is less than or equal to 75m, the total effective leakage area of the green disc is at least 0.05m2 (equivalent to the vertical diameter of the lower measured dry disc 250mm) and compare with formula (2) to select the larger value) The static medium pressure of the dry disc is 0.35MPa+0.05MP, 2010℃5.7.7.2 Requirements for the rupture disc of the high-pressure rupture disc equipment 8
JB/T8856-2001
The static detonation pressure of the bursting disc can be: 8.5MP±1MPa, 20℃±10℃: 10MPa+7MPa.20±10; 12MP±1MP, 20C±10. Choose one of the three gears. The effective pressure relief of the bursting disc is related to the empty capacity of the equipment. Under the condition of meeting 5, 5.2.5, this standard recommends that the diameter of the operating disc is greater than or equal to mm. 5.7.3 The installation of the bursting disc should be connected to the equipment protected by the bursting disc. The pressure relief of the bursting disc should be outdoors as much as possible, otherwise it must be led to the outdoors with a discharge pipe. The discharge area should be twice the area of the pressure relief pipe, and its length should be short to avoid right angles. The α position does not pose a danger to people and equipment.
5.7.4 The rupture pieces are not allowed to be made of cast iron materials. If necessary, they should be protected by anti-corrosion. The rupture pieces installed outdoors or in outdoor discharge areas shall not be damaged by rain, snow or sewage. 5.5 The rupture pieces should be made of products produced by professional designated manufacturers. 5.8 Design and service life
In order to prevent the safety problem of over-life operation of the pyrolysis equipment, the designer should indicate the design service life of the pyrolysis equipment on the design sample.
S.9 Environmental (room 1) requirements
5.9.1 The place where the pyrolysis equipment is installed shall comply with the provisions of GR50031 and GBJ16. S.9.1 The environmental humidity of the place where the purification equipment and water supply system made of non-metallic materials are installed shall not be less than 0. 5.9.3 All electrical appliances, motors and electronic and electrical instruments with power supply provided and installed in the same factory building must comply with the requirements of G50058. 5.10 Manufacturing 5.10.1 Welded containers for low-pressure liquids shall comply with the requirements of JB4735. 5.10.1 Low-pressure mixing gas storage tanks shall comply with the requirements of the customs regulations on manufacturing and inspection. 5.10.3 The welded container of medium-pressure acetylene equipment shall be manufactured in accordance with the provisions of GB150, and the welding quality requirements are as follows: a) Class A welds shall be subjected to 100% X-ray non-destructive testing and inspection and meet the requirements of B4730Ⅱ; b) Class B welds shall be subjected to greater than or equal to 20% X-ray non-destructive testing and inspection and meet the requirements of JB4730. 5.10.4 The welded container of high-pressure acetylene equipment shall be manufactured in accordance with the provisions of GB150, and the A and B welds shall be subjected to 100% X-ray non-destructive testing and inspection and meet the requirements of Level Ⅱ.
5.10.5 When the pipeline is connected in the form of joint connection, it shall meet the following requirements: a) High-pressure pipelines shall meet the requirements of Level Ⅱ specified in GB50235; b) Medium-pressure pipelines shall meet the requirements of Level Ⅱ specified in GB50235. 5.41 Pressure resistance test and air tightness test
5.11.1 For the high pressure test of dissolved acetylene equipment (excluding safety devices), the pressure shall be raised to the specified test pressure by liquid (water), the pressure shall be maintained for 30min, and then the pressure shall be reduced to 1% of the test pressure. At the same time, inspection shall be carried out. There shall be no vortex or deformation. 3.11.2 The test pressure of low and medium pressure dissolved acetylene equipment shall be in accordance with the provisions of Table 3. 5.11.3 The test force of high pressure dissolved acetylene equipment shall be calculated according to formula (3): f* =lip+1
Where: P--test force of high pressure equipment, MPa: P--high working pressure of high pressure equipment, MPaa When p is less than 2.SMPa, the test pressure is =30MPa. t3
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.