This standard specifies the classification, technical requirements, test methods, inspection rules, marking and packaging of marine air bottle safety valves. This standard is applicable to safety valves with a nominal diameter of 6~20mm and a working pressure of 1MPa and 3MPa. GB/T 14087-1993 Marine Air Bottle Safety Valve GB/T14087-1993 Standard download decompression password: www.bzxz.net

UDC621.646.4:629.12.01
National Standard of the People's Republic of China
GB/T 14087—93
Safety valves for marine air bottles
Safety valves for marine air bottles1993-01-09Promulgated
Implementation on 1993-10-01
Promulgated by the State Bureau of Technical Supervision
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National Standard of the People's Republic of China
Safety valves for marine air bottles
Safely valves for marine air bottles1Subject content and scope of application
GB/T14087—93
This standard specifies the classification, technical requirements, test methods, inspection rules, marking and packaging of safety valves for marine air bottles (hereinafter referred to as safety valves).
This standard applies to safety valves with a nominal diameter of 6~20 mm and a working pressure of 1 MPa.3 MPa. 2 Product classification
2.1 Basic parameters of safety valves, see Table 1.1
Industrial and medical products
2.2 Structure and dimensions of safety valves, see Figure and Table 2. State Technical Supervision Bureau 1993-01-D9 approved the public funds diameter L
6,10+15,20
1993-10-01 implementation
W. Nominal diameter
Nozzle diameter
2.3 Marking example
CB/T 14087---93
1--Wide seat; 2-Wide body, 3--Adjusting ring; 4-Closed surface, 5-Circuit plate; 6-Spring rate, 7-Spring rate
3 Working pressure
Connection size
Working pressure is 3MPa, nominal diameter is 10rm Marine air bottle safety valve: full reading 3001GGB/140873
Working pressure is 1MPa, nominal diameter is 6mm Safety valve for marine air cylinders: Safety valve 10006 GB/T 14087-93
Overall dimensions
W.3 Technical requirements
3.1 Materials of main components shall be as per Table 3.
Parts name
Adjusting ringwww.bzxz.net
Rolling cover
GB/T 14087-93
Stainless steel
High quality
Rubber or plastic
Spring pot
SOCEVA
Standard number
CR1220--84
GR 699--88
GB 4424---84
GB1520-84
5220---85
3.2 The valve disc and seat seal should be ground, and there should be no scratches, pits, pores, cracks and other defects on the surface. The roughness should be ≤6.2. 3.3 The valve seat should be tested for strength and material tightness at 1.5p by hydraulic pressure. 3.4 The lifting pressure of the valve should not be greater than 1.1 times the working pressure, and the return pressure should not be less than 0.87 times the pressure. 3.5 Airtightness requirements
3.5.1 The safety valve of the soft seal should not be full under the working pressure. 3.5.2 The leakage of the hard-sealed safety valve should not exceed 20 bubbles per minute under the working pressure. 4 Test method
4.1 Conditions
4.1.1 The volume of the test container should be sufficient to enable the safety valve to maintain sufficient test pressure under the specified action. 4.1.2 The pressure should be 1.5~2 times of the maximum test pressure of the gauge range, and the accuracy level should not be lower than 1.5 level. 4.1.3 All pressure vessels, connecting pipes and pipes used for testing should be able to withstand liquid with a variable force ≥ 2 force. The surface of welded parts should be cleaned, and the welds should be inspected by magnetic particles. The pressure gauge or pressure vessel should have valid calibration and certification. 4.2 Strength and material tightness test
Seal the sealing surface of the safety valve seat, and use hydraulic pressure p-1.5p at the inlet end of the seat to carry out strength and material tightness tests, and keep it constant for s min.
4.3 Opening test procedure
Open the inlet air pressure of the safety valve. When the pressure reaches 0.1MPa, the rising speed shall not exceed 0.01MPa/perform the opening test, observe and record the opening force of the safety valve, and the number of tests shall not be less than 3 times. The result shall comply with Article 3.4. 4.4 Seat return test
When the safety valve is opened and discharged, reduce the inlet pressure of the safety valve, observe and record the valve seat pressure, and the number of tests shall not be less than 3 times. The result shall comply with Article 3.4.
5 Inspection regulations
Inspection is divided into type inspection and output inspection.
5.1 Type inspection
5.1.1 Type inspection shall be conducted in any of the following cases: a. Trial type inspection for product transfer to production according to GB/T 14087-93; b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance; and b. During normal production, once every four years. 5. 1.2 Type inspection and factory inspection items shall be in accordance with Table 1. Table 4
5.2 Factory inspection
Material physical and chemical tests
Strength and material tightness test
Opening test
Reseat test
Gas resistance test
Type inspection
Comply with 3.1
Comply with 3.3+4.2
Comply with 3.4+4.3
Comply with 3.4,4.4
Each safety valve shall be subject to factory inspection and shall be sealed and stamped with inspection mark before it can be shipped. 6 Marking and packaging
6.1 The obvious parts of the valve body must be marked with product mark, factory mark and factory number. 6.2 After the product passes the test, the inner surface needs to be baked and the outer shell needs to be painted. 6.3 The imported thread is protected by a plastic cover. 6.4 The product should have a product certificate and a ship inspection certificate. 6.4.1 The product certificate shall include:
Manufacturer name:
Factory date,
Product name:
Nominal diameter +
Opening force;
Reseat pressure.
6.5 The product certificate shall include:
6.5.1Official seal of the manufacturing and inspection department,
6.5.2Seal of the inspector;
6.5.3Inspection date;
6.5.4Performance data:
6.5.5Inspection certificate:
6.6The product shall be stored in a dry room.
Factory inspection
Comply with 8.3, 4.2
Comply with 3.4, 4.3
Comply with 3.4, 1.4
Comply with 3.5
W. Additional remarks,
This standard is proposed by China State Shipbuilding Corporation. GB/T14087—93
This standard is under the jurisdiction of the Auxiliary Boiler Pollution Prevention Technical Committee of the National Technical Committee for Standardization of Marine Machinery. This standard was drafted by the 704th Institute of the Seventh Research Institute of China State Shipbuilding Corporation, with participation from the High-speed Internal Engine Parts Factory, and the main drafter of this standard was Liu Zhicheng.
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