GB/T 40011-2021Pilot safety valve for cryogenic fluid service (English PDF)
低温先导式安全阀
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
April 30, 2021
Implementation date
November 1, 2021
Scope
GB/T 40011-2021 is the English-translated version of 低温先导式安全阀.
GB/T 40011-2021 covers pilot-operated safety valves for cryogenic service, where the medium is a vaporized low-temperature gas. It applies to valves up to PN100 and DN500 working at temperatures not lower than -196 °C with a set pressure of at least 0.1 MPa, and may be used as a reference for set pressures from 0.06 MPa to 0.1 MPa.
It specifies technical requirements on structure, design, materials, non-destructive testing, degreasing and performance.
Test methods cover a room temperature test, a low temperature test and a sealing test after the valve returns to normal temperature, followed by inspection items, factory inspection and lead sealing, type testing, marking of the main valve, pilot valve and nameplate, and packaging, transportation and storage. It was issued on 30 April 2021 and has applied since 1 November 2021.
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Document preview — GB/T 40011-2021
National Standard of the People's Republic of China
- ICS
- 13.240
- Classification
- J 16
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Technical requirements
- 4.1 Structure
- 4.2 Design requirements
- 4.3 Material
- 4.4 Non-destructive testing
- 4.5 Degreasing treatment
- 4.6 Performance
- 5 Test method
- 5.1 Room temperature test
- 5.2 Low temperature test
- 5.3 Sealing test after returning to normal temperature
- 6 Inspection requirements
- 6.1 Inspection items and technical requirements
- 6.2 Factory inspection and lead sealing
- 6.3 Type test
- 7 Sign
- 7.1 Marking on the main valve body
- 7.2 Marking on the valve body of the pilot valve
- 7.3 Marking on the nameplate
- 8 Packaging, transportation and storage
- 8.1 Packaging
- 8.2 Transportation
- 8.3 Storage
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies the terms and definitions, technical requirements, test methods, and inspection requirements of low-temperature pilot-operated safety valves (hereinafter referred to as safety valves). Marking, packaging, transportation and storage.
This standard applies to the nominal pressure less than or equal to PN100, the nominal size less than or equal to DN500, and the working temperature is not lower than Pilot-operated safety valve for low-temperature vaporized gas medium with a minimum set pressure of 0.1MPa at -196°C.
The pilot-operated safety valve for the low-temperature vaporized gas medium with the set pressure of 0.06MPa~0.1MPa can be used as a reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 150.4 Pressure Vessel Part 4: Manufacturing, Inspection and Acceptance
GB/T 12225 General Valve Copper Alloy Casting Technical Conditions
GB/T 12241 General requirements for safety valves
GB/T 12242 Specification for Performance Test of Pressure Relief Device
GB/T 28778 Pilot operated safety valve
JB/T 7248 Technical Conditions of Low Temperature Steel Castings for Valves
HG20202 degreasing engineering construction and acceptance specification
NB/T 47013.2-2015 Non-destructive testing of pressure equipment Part 2: Radiographic testing
NB/T 47013.3-2015 Non-destructive testing of pressure equipment Part 3: Ultrasonic testing
NB/T 47013.5-2015 Non-destructive testing of pressure equipment Part 5: Penetration testing
3 Terms and definitions
The terms and definitions defined in GB/T 12241, GB/T 12242 and GB/T 28778 apply to this document.
4 Technical requirements
4.1 Structure
The composition diagram of the low-temperature pilot-operated safety valve is shown in Figure 1.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 150.4Pressure vessels - Part 4: Fabrication, inspection and testing, and acceptance
- GB/T 12225General purpose industrial valves - Specification of copper alloy castings
- GB/T 12241Safety valves - General requirements
- GB/T 12242Pressure relief devices - Performance test code
- GB/T 28778Pilot operated safety valves
- JB/T 7248Technical specification for low temperature service steel casting for valves
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Related Standards
GB/T 12225-2018 — General purpose industrial valves - Specification of copper alloy castings
GB/T 12241-2021 — Safety valves - General requirements
GB/T 12242-2021 — Pressure relief devices - Performance test code
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GB/T 40011-2021
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