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JB/T 8937-2025Wafer, lug wafer and flange connection check valves (English PDF)

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Issued by

Ministry of Industry and Information Technology

Level / Type

National · Recommended

Issue date

July 2, 2025

Implementation date

February 1, 2026

Scope

JB/T 8937-2025 (Wafer, lug wafer and flange connection check valves) is available as an English-translated PDF.

JB/T 8937-2025 — This standard specifies the structural types, technical requirements, and material requirements of clamp, lug, and flange-connected check valves, describes the corresponding test methods, and specifies the inspection rules, marking, and supply requirements.

This standard applies to the manufacture of check valves of the following specifications: �� Nominal size DN50��DN2100 and nominal pressure not exceeding PN400 or nominal size NPS2��NPS84 and nominal pressure not exceeding Class2500.

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Document preview — JB/T 8937-2025

National Standard of the People's Republic of China

ICS: 23.060.99
Classification: J 16
Replacing: JB/T 8937-2010

Issued by: Ministry of Industry and Information Technology

What this standard covers1
Document data2

What this standard covers

This standard specifies the structural types, technical requirements, and material requirements of clamp, lug, and flange-connected check valves, describes the corresponding test methods, and specifies the inspection rules, marking, and supply requirements. This standard applies to the manufacture of check valves of the following specifications: � Nominal size DN50�DN2100 and nominal pressure not exceeding PN400 or nominal size NPS2�NPS84 and nominal pressure not exceeding Class2500. Double-disc swing check valves with clamp, lug, and flange connections�nominal size DN50�DN1200 and nominal pressure not exceeding PN400 or nominal size NPS2�NPS48 and nominal pressure not exceeding Class2500.

Document data

International classification (ICS): 23.060.99.

Chinese classification (CCS): J16.

Estimated length of the Chinese original: 25,244 words.

Supersedes the earlier edition JB/T 8937-2010.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

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