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JB/T 12626-2016Gate valves for liquefied natural gas (English PDF)

液化天然气用闸阀

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

January 15, 2016

Implementation date

June 1, 2016

Scope

JB/T 12626-2016 is the English-translated version of 液化天然气用闸阀.

Gate valves for liquefied natural gas are the subject of JB/T 12626-2016, a recommended standard of the Chinese machinery industry. The document sets the structural type, the technical requirements, the inspection and test methods, the inspection rules and the provisions for marking, protection, packaging and storage.

It applies to flanged and welded gate valves whose working medium is liquefied natural gas, of nominal pressure PN16 to PN250 and nominal size DN25 to DN600, or pressure class Class 150 to Class 1500 and nominal size NPS 1 to NPS 24; other low-temperature gate valves may also be handled by reference to it.

Among the standards it quotes are GB/T 9113, GB/T 12220, GB/T 12234, GB/T 26480, GB 26640, JB/T 7927-2014, JB/T 12621-2016 and NB/T 47014. The Chinese classification is J16 and the international classification 23.060.30.

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Document preview — JB/T 12626-2016

National Standard of the People's Republic of China

ICS: 23.060.30

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

1 Scope
2 Normative references
3 Structural type
4 Technical requirements
4.1 General
4.2 Valve body
4.3 Bonnet
4.4 Gate
4.5 Stem
4.6 Packing and stuffing box
4.7 Operating force
4.8 Direction of operation
4.9 Degreasing treatment
4.10 Materials
4.11 Low temperature impact test
4.12 Cryogenic treatment
4.13 Appearance quality
4.14 Treatment of the defects
4.15 Non-destructive testing
4.16 Valve test
5 Inspection and test methods
5.1 Inspection of the appearance
5.2 Dimensional inspection
5.3 Analysis of the composition of the material
5.4 Mechanical properties of the material
5.5 Non-destructive testing
5.6 Performance test at ambient temperature
5.7 Performance test at low temperature
5.8 Fugitive emission test
5.9 Low temperature cycling life test
5.10 Low temperature impact test
5.11 Inspection of the marking and of the nameplate
6 Inspection rules
6.1 Classification of inspection and inspection items
6.2 Factory inspection
6.3 Type inspection
7 Marking

What this standard covers

This standard specifies the structural type, technical requirements, inspection and test methods, inspection rules, marking, protection, packaging and storage of liquefied natural gas gate valves. This standard applies to the nominal pressure PN16 ~ PN250, nominal size DN25 ~ DN600 and pressure class Class150 ~ Class1500, nominal size NPS1 ~ NPS24, the working medium is the liquid natural gas flange and welding connected gate valve (hereinafter referred to as gate valve). Other temperatures higher than -162°C low temperature gate valve can also refer to the use.

Document data

International classification (ICS): 23.060.30.

Chinese classification (CCS): J16.

Estimated length of the Chinese original: 13,151 words.

Standards quoted by this document

GB/T 9113; GB/T 12220; GB/T 12221; GB/T 12224; GB/T 12234; GB/T 26480; GB/T 26481; GB 26640; JB/T 7248; JB/T 7927-2014; JB/T 7928; JB/T 12621-2016; JB/T 12622; NB/T 47014

3 Structural type

4 Technical requirements

5 Inspection and test methods

6 Inspection rules

7 Marking

......
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

Similar standards

GB/T 12234-2019|GB/T 28776-2012|JB/T 12621-2016|JB/T 12622-2016|JB/T 12623-2016|JB/T 12624-2016

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