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GB/T 33926-2017Stainless steel pipe fitting of ring compression (English PDF)

不锈钢环压式管件

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 12, 2017

Implementation date

February 1, 2018

Scope

GB/T 33926-2017 is the English-translated version of 不锈钢环压式管件.

GB/T 33926-2017 is the Chinese national standard for ring-compression stainless steel pipe fittings. It gives the terms and definitions, the classification and marking, the structure types and dimensions, the technical requirements, the tests, the inspection rules and the provisions on packaging, transport and storage of the fittings.

It applies to the design, manufacture and acceptance of ring-compression fittings joined to stainless steel pipe with nominal size up to DN150 and nominal pressure up to PN25 for drinking water, cold and hot water, seawater and fire fighting, up to PN16 for medical gas, negative pressure, compressed air and siphonic drainage, and up to PN4 for gas.

It defines the ring compression connection, the mechanical joint made by squeezing the fitting, the cylindrical rubber seal and the stainless steel tube together in the circumferential direction with a dedicated tool.

Annex A gives the structure and basic dimensions of the fittings, Annex B the seals and Annex C the stainless steel pipes the fittings connect. It cites GB/T 191, GB/T 4334-2008, GB/T 7306.1, GB/T 7306.2, GB/T 7307, GB/T 10125, GB/T 12771, GB/T 17219, GB/T 21873-2008, GB/T 23658-2009, GB/T 27572-2011, GB/T 28604-2012, GB/T 29038 and ASTM A763.

It carries ICS 23.040.60 and Chinese classification J15, was issued on 12 July 2017 and has applied since 1 February 2018.

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Document preview — GB/T 33926-2017

National Standard of the People's Republic of China

ICS: 23.040.60
Classification: J 15

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 normative reference document
3 Terms and definitions
4 classification and marking
Structure type and size
Technical requirements
7 Test
8 test
Packaging, transportation and storage
Appendix A (Normative Appendix) Structure and basic dimensions of fittings
Appendix B (Normative Appendix) Seal
Appendix C (informative) Stainless steel pipe connected to pipe fittings

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the terms and definitions, classification and marking of stainless steel ring-type pipe fittings (hereinafter referred to as pipe fittings), structure type and size. Technical requirements, testing, inspection, packaging, transportation and storage.

This standard applies to the nominal size of not more than DN150, the nominal pressure is not greater than PN25 drinking water, drinking water, cold water, heat Water, seawater and fire, nominal pressure not more than PN16 medical gas, negative pressure, compressed air and siphon drainage, and nominal pressure not greater than PN4 gas and other stainless steel pipe connection with ring pressure pipe design, manufacture and acceptance.

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 191 packaging and storage icon

GB/T 4334-2008 Corrosion of metals and alloys - Test method for intergranular corrosion of stainless steels

GB/T 7306.1 55° sealed pipe thread - Part 1: Cylindrical female thread with conical external thread

GB/T 7306.2 55° sealed pipe thread - Part 2: Conical internal thread and conical external thread

GB/T 7307 55° unsealed pipe thread

GB/T 10125 artificial atmosphere corrosion test salt spray test

GB/T 12771 Stainless steel welded pipe for fluid delivery

GB/T 17219 Safety evaluation criteria for drinking water distribution equipment and protective materials

GB/T 21873-2008 Specification for interface seals for rubber seals, for drains and sewers

GB/T 23658-2009 elastomeric seals for the delivery of gaseous fuels and hydrocarbon liquids for pipelines and fittings Claim

GB/T 27572-2011 Rubber seals 110 °C Hot water supply pipe pipe joint seal material specification

GB/T 28604-2012 Rubber seals for drinking water piping systems

GB/T 29038 Technical specification for thin wall stainless steel pipes

ASTM A763 Standard Practice for Sensitivity Detection of Intergranular Corrosion of Ferritic Stainless Steel (StandardPracticesfor DetectingSusceptibilitytoIntergranularAttackinFerriticStainlessSteels)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Ring link connection

With a special tool to pipe fittings together with the cylindrical rubber seals and stainless steel tube in the circumferential direction of the extrusion into one of a pipe machine Mechanical connection.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 22 pages — is available in the English PDF.

Referenced standards

Normative references

ASTM A763

Similar standards

GB/T 47414-2026|GB/T 47569-2026|GB/T 47763-2026|GB/T 12385-2025|GB/T 12459-2025|GB/T 13401-2025

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