GB/T 21387-2025 Active National standards

GB/T 21387-2025 Axial flow check valve for water supply system

GB/T 21387-2025 Axial flow check valve for water supply system

Publish Date: 2025-10-31 Implement Date: 2026-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 21387-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: \nValve

ICS Name: Check valve

Publish Date: 2025-10-31

Implement Date: 2026-05-01

Pages: 20 pages

Scope

This document specifies the general requirements, technical requirements, test methods, inspection rules, and marking, packaging, transportation, and storage for axial-flow check valves used in water supply systems.
This document is applicable to axial-flow check valves with nominal sizes of DN50 to DN2200 and nominal pressures of PN6 to PN100, used in water supply systems where the medium temperature does not exceed 65°C.

Development Information

Word Count: 29 Thousand words Pages: 20 pages

Replace the following standards

GB/T 21387-2008 Axial flow check valve

Referenced Standards

GB/T 17241.2-1998 Cast iron pipe blank flanges GB/T 17241.2-2024 Cast iron pipe flanges—Part 2:Class designated GB/T 20878-2007 Stainless and heat-resisting steels—Designation and chemical composition GB/T 20878-2024 Stainless steels—Designation and chemical composition GB/T 21873-2008 Rubber seals—Joint rings for water supply,drainage and sewerage pipelines—Specification for materials GB/T 21873-2025 Rubber seals—Joint rings for water supply,drainage and sewerage pipelines—Specification for materials GB/T 24588-2009 Stainless steel wires for spring GB/T 24588-2019 Stainless steel spring wires GB/T 26640-2011 Specification for minimal thickness of the shell of valves GB/T 30832-2014 Valves—Test method of flow coefficient and flow resistance coefficient GB/T 32808-2016 Valves—Model designation method

Related Standards

GB/T 12233-2006 Replaced

GB/T 12233-2006 General purpose industrial valves—Casting iron globe valves and lift check valves

Publish Date: 2006-12-25

GB/T 12235-2007 Replaced

GB/T 12235-2007 Steel globe valves and lift check valve for petroleum,petrochemical and allied industries

Publish Date: 2007-04-18

GB/T 12236-2008 Replaced

GB/T 12236-2008 Steel swing check valve for petroleum,petrochemical and allied industries

Publish Date: 2008-02-02

GB/T 21387-2008 Replaced

GB/T 21387-2008 Axial flow check valve

Publish Date: 2008-02-02

GB/T 26478-2011 Active

GB/T 26478-2011 Globe valves for ammonia and lift check valves

Publish Date: 2011-05-12

GB/T 26482-2011 Active

GB/T 26482-2011 Fire type-testing requirement for check valves

Publish Date: 2011-05-12