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GB/T 4622.2-2022Spiral wound gaskets for pipe flanges - Part 2: Class designated (English PDF)

管法兰用缠绕式垫片第2部分：Class系列

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 12, 2022

Implementation date

October 12, 2022

Scope

GB/T 4622.2-2022 is the English-translated version of 管法兰用缠绕式垫片第2部分：Class系列.

GB/T 4622.2-2022 is the Chinese standard "Spiral wound gaskets for pipe flanges - Part 2: Class designated".

Its scope clause reads: This document specifies the type, code, size and technical requirements of spiral wound gaskets for pipe flanges marked by Class (hereinafter referred to as "gaskets"). requirements, inspection methods, inspection rules, markings, signs, ordering information, packaging and storage.

This document applies to GB/T 9124.2 with nominal pressure of Class150~Class1500 and nominal size of DN15~ Spiral wound gaskets for pipe flanges of DN600 (NPS1/?~NPS24). Its clauses include terms and definitions; type and code.

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Document preview — GB/T 4622.2-2022

National Standard of the People's Republic of China

ICS: 23.040.60
Classification: J 15
Replacing: GB/T 4622.1-2009

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

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Type and code
4.1 Type
4.2 Code
5 size
5.1 Basic spiral wound gasket for tongue and groove flange size
5.2 Size 7 of spiral wound gasket with inner ring for concave and convex flange
5.3 Spiral wound gasket with retaining ring for flat and raised face flanges dimension
5.4 Spiral wound gaskets with inner and retaining rings for flat and raised face flanges size
6 Technical requirements
6.1 Materials
6.2 Process requirements
6.3 Dimensional deviation
6.4 Appearance quality
6.5 Performance requirements
7 Inspection methods
7.1 Appearance quality
7.2 Dimensional measurement
7.3 Performance test
8 Inspection rules
8.1 Inspection classification
8.2 Factory inspection
8.3 Type inspection
9 Marking, marking, ordering information, packaging and storage
9.1 Mark
9.2 Flags
9.3 Ordering Information
9.4 Packaging
9.5 Storage
Appendix A (Informative) User Ordering Information

1 Scope

This document specifies the type, code, size and technical requirements of spiral wound gaskets for pipe flanges marked by Class (hereinafter referred to as "gaskets").

requirements, inspection methods, inspection rules, markings, signs, ordering information, packaging and storage.

This document applies to GB/T 9124.2 with nominal pressure of Class150~Class1500 and nominal size of DN15~

Spiral wound gaskets for pipe flanges of DN600 (NPS1/?~NPS24).

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 2054 Nickel and Nickel Alloy Plate

GB/T 3003 Refractory Fibers and Products

GB/T 3274 Carbon Structural Steel and Low Alloy Structural Steel Hot Rolled Sheet and Strip

GB/T 3280 Stainless Steel Cold Rolled Steel Plate and Strip

GB/T 5019.4 Mica-based insulating materials-Part 4.Mica paper

GB/T 12385-2008 Test method for sealing performance of gaskets for pipe flanges

GB/T 12622-2008 Test method for compression rate and rebound rate of gaskets for pipe flanges

GB/T 27793 Asbestos-free fiber gasket material by copying method

JB/T 6618 Technical requirements for PTFE tapes for metal wound gaskets

JB/T 7758.2 Technical conditions of flexible graphite sheet

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Type and code

4.1 Type

4.1.1

See Figure 1 to Figure 4 for the type of wound gasket.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

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

Editions of GB/T 4622.2

Edition	Title	Revision	Status
GB/T 4622.2-2022	Spiral wound gaskets for pipe flanges - Part 2: Class designated	current edition	Current
GB/T 4622.1-2009	Spiral wound gaskets for pipe flanges - Part 2: Class designated	previous edition	Superseded

This page sells the current edition, GB/T 4622.2-2022. Earlier editions are listed for reference only.

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