GB/T 9128.1-2023 English PDF

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GB/T 9128.1-2023: Metallic ring joint gaskets for steel pipe flanges - Part 1: PN designated
Status: Valid

GB/T 9128.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 9128.1-2023	349	Add to Cart	4 days	Metallic ring joint gaskets for steel pipe flanges - Part 1: PN designated	Valid
GB/T 9128-2003	199	Add to Cart	2 days	Dimensions of metallic ring-joint gaskets for use with steel pipe flanges	Obsolete
GB/T 9128.1-1988	199	Add to Cart	2 days	Octagonal metallic ring gaskets for steel pipe flanges joints	Obsolete

Similar standards

GB/T 12385   GB/T 9125.1   GB/T 9125.2   GB/T 9126.1   GB/T 9126.2   GB/T 9128.2   

Basic data

Standard ID: GB/T 9128.1-2023 (GB/T9128.1-2023)
Description (Translated English): Metallic ring joint gaskets for steel pipe flanges - Part 1: PN designated
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J15
Classification of International Standard: 23.040.60
Word Count Estimation: 18,198
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Older Standard (superseded by this standard): GB/T 9128-2003,GB/T 9130-2007; ���ִ��棺GB/T 9128-2003; GB/T 9130-2007
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 9128.1-2023: Metallic ring joint gaskets for steel pipe flanges - Part 1: PN designated

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 23.040.60 CCSJ15 National Standards of People's Republic of China Partially replaces GB/T 9128-2003, GB/T 9130-2007 Metal ring gasket for steel pipe flange Part 1.PN Series Part 1.PNdesignated Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

Preface III Introduction IV 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Type and code 1 4.1 Type 1 4.2 Code 2 5 size 2 6 Materials and Manufacturing 5 6.1 Material 5 6.2 Manufacturing 5 7 Requirements 5 7.1 Appearance quality 5 7.2 Dimensional limit deviation 6 7.3 Hardness 6 8 Inspection method 7 8.1 Appearance quality7 8.2 Dimensional limit deviation 7 8.3 Hardness 7 9 Inspection Rules 7 9.1 Inspection 7 9.2 Sampling and determination rules 8 10 Marking, marking, packaging and storage8 10.1 Mark 8 10.2 Flag 8 10.3 Packaging 8 10.4 Storage and transportation9 Reference 10 Figure 1 Structural type 2 of oval metal ring gasket Figure 2 Structural type 2 of octagonal metal ring gasket Figure 3 Metal ring pad hardness test position 7 Table 1 Type code of metal ring gasket 2 Table 2 Dimensions of metal ring gasket3 Table 3 Commonly used materials for metal ring gaskets and recommended maximum operating temperatures 5 Table 4 Dimensional limit deviation of metal ring gasket 6 Table 5 Recommended maximum hardness value of 6 commonly used materials for metal ring pads

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is Part 1 of GB/T 9128 "Metal Ring Gasket for Steel Pipe Flanges". GB/T 9128 has released the following parts. ---Part 1.PN series; ---Part 2.Class Series. This document partially replaces GB/T 9128-2003 "Metal Ring Gasket Dimensions for Steel Pipe Flanges" and GB/T 9130-2007 "Steel Pipe Flange Dimensions" "Technical Conditions for Metal Ring Gaskets for Flanges", compared with GB/T 9128-2003 and GB/T 9130-2007, except for structural adjustments and editorial changes In addition, the main technical changes are as follows. a) The dimensions of PN series metal ring gaskets are added (see Table 2), and the dimensions of Class series metal ring gaskets are deleted (see GB/T 9128- Table 1 of.2003); b) The material name/grade of the metal ring gasket has been changed (see Table 3, Table 1 of GB/T 9130-2007); c) Added common materials for metal ring gaskets and recommended maximum operating temperatures (see Table 3); d) Changed the dimensional limit deviation of metal ring gasket (see Table 4, Table 4 of GB/T 9130-2007); e) Added manufacturing requirements for metal ring gaskets (see 6.2.1, 6.2.2); f) The recommended maximum hardness value of commonly used materials for metal ring gaskets has been changed (see Table 5, Table 3 of GB/T 9130-2007); g) Added provisions for selecting metal ring pad hardness test methods (see 8.3.1); h) The inspection rules have been changed (see Chapter 9, Chapter 6 of GB/T 9130-2007); i) Added the content of signs (see 10.2.1). Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee on Standardization of Pipe Accessories (SAC/TC237). This document was drafted by. China Machinery Productivity Promotion Center Co., Ltd., Cixi Hengli Sealing Materials Co., Ltd., Ningbo Tiansheng Seals Co., Ltd., Zhejiang Cathay Xiaoxing Sealing Materials Co., Ltd., Wenzhou Huahai Sealing Materials Co., Ltd., Wenzhou Yiyu Sealing Materials Co., Ltd. Company, Wuxi Xixi Chemical Machinery Parts Co., Ltd., Guangzhou Dongshan Southern Seals Co., Ltd. The main drafters of this document. Feng Feng, Qiu Kuanheng, Xu Shaohuan, Wu Yimin, Lu Wenming, Zhang Jiahong, Zhang Yong, Fang Deyin, Hui Fuming, Wu Kaijun, Zhu Xiaoping, Li Xiaoqin. The previous versions of this document and the documents it replaces are as follows. ---First published as GB/T 9128.1-1988 and GB/T 9128.2-1998 in 1988, and merged into the first revised version in.2003. GB/T 9128-2003; ---First published as GB/T 9130-1988 in 1988, first revised in.2007; ---This is the second revision.

Introduction

Metal ring gasket is a commonly used sealing gasket in flange joints. Current pipe flange standard GB/T 9124.1-2019 "Steel Pipe Flange The PN series ring connection flanges specified in Part 1.PN Series require corresponding PN series metal ring gaskets to match them, and are currently Metal ring gasket standards GB/T 9128-2003 "Metal ring gasket dimensions for steel pipe flanges", GB/T 9130-2007 "Metal ring gaskets for steel pipe flanges" It has been more than ten years since the release and implementation of "Technical Conditions for Metal Ring Gaskets". During this period, the materials used for metal ring gaskets have been updated, and certain process requirements for metal ring gaskets have Unable to meet market demand, therefore, in order to adapt to the pipe flange standards written in two series. PN and Class, the metal ring gasket The standard is also divided into PN series and Class series accordingly. GB/T 9128 aims to establish the necessary requirements for the design, manufacture, performance and selection of metal ring gaskets for steel pipe flanges. It is planned to be composed of two parts composition. ---Part 1.PN series. The purpose is to establish the specifications, dimensions and technical requirements for metal ring gaskets for PN series steel pipe flanges. ---Part 2.Class Series. The purpose is to establish the specifications, dimensions and technology of metal ring gaskets for Class series steel pipe flanges Require. Metal ring gasket for steel pipe flange Part 1.PN Series

1 Scope

This document specifies the type and code, dimensions, materials and manufacturing, requirements, and test methods of metal ring gaskets for PN-marked steel pipe flanges. laws, inspection rules and marking, marking, packaging, storage and transportation. This document is applicable to steel pipe flange metal for ring connection sealing surfaces with nominal pressures PN63~PN400 specified in GB/T 9124.1 It is a ring pad.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 230.1 Rockwell hardness test of metallic materials Part 1.Test methods GB/T 231.1 Brinell hardness test of metallic materials Part 1.Test method GB/T 699 High-quality carbon structural steel GB/T 1220 stainless steel rod GB/T 1221 Heat-resistant steel rods GB/T 6060.2 Surface roughness comparison sample grinding, turning, boring, milling, inserting and planing surface GB/T 6983 Electromagnetic pure iron GB/T 15008 Corrosion-resistant alloy rod

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Type and code

4.1 Type Metal ring gaskets for steel pipe flanges (hereinafter referred to as "metal ring gaskets") are divided into oval metal ring gaskets (hereinafter referred to as "elliptical gaskets") and eight-shaped metal ring gaskets (hereinafter referred to as "metal ring gaskets") according to their cross-sectional shapes. There are two types of angular metal ring pads (octagonal pads for short). The structures of the two types of metal ring pads are shown in Figure 1 and Figure 2. ......

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