GB/T 20328-2023 English PDF

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GB/T 20328-2023: Circular screwing dies of R series for taper pipe threads
Status: Valid

GB/T 20328: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20328-2023	189	Add to Cart	3 days	Circular screwing dies of R series for taper pipe threads	Valid
GB/T 20328-2006	199	Add to Cart	2 days	Circular dies for taper pipe threads -- R series	Obsolete

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Basic data

Standard ID: GB/T 20328-2023 (GB/T20328-2023)
Description (Translated English): Circular screwing dies of R series for taper pipe threads
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J41
Classification of International Standard: 25.100.50
Word Count Estimation: 10,131
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Older Standard (superseded by this standard): GB/T 20328-2006
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 20328-2023: Circular screwing dies of R series for taper pipe threads

---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 25.100.50 CCSJ41 National Standards of People's Republic of China Replace GB/T 20328-2006 R series tapered pipe thread round die Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

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 replaces GB/T 20328-2006 "R series tapered pipe thread circular die". Compared with GB/T 20328-2006, except for the structure In addition to adjustments and editorial changes, the main technical changes are as follows. ---GB/T 7306.1 and GB/T 7306.2 are changed to informative references; ---Added terms and definitions (see Chapter 3). This document is modified to adopt ISO 4230.2016 "R Series of Conical Pipe Thread Dies for Hand and Machine Use". Compared with ISO 4230.2016, this document has made the following structural adjustments. ---Added Chapter 3 Terms and Definitions; ---Chapter 4 corresponds to Chapter 3 in ISO 4230.2016; ---Chapter 5 corresponds to Chapter 4 in ISO 4230.2016; ---Added Chapter 6 Technical Requirements. The technical differences between this document and ISO 4230.2016 and their reasons are as follows. ---Deleted the normative reference document ISO 2568 and added GB/T 970.2 (see Chapter 6); ---The outer diameter and thickness of individual round dies have been adjusted (see Table 1) to facilitate the use of this document; ---The base distance dimension of the thread has been increased (see Table 1) to facilitate the use of this document; ---In Figure 1, the fastening hole angle value is added to facilitate the use of this document; ---Deleted the concave platform in the structure; ---Deleted dimension E1. ---Added the file code in the mark example (see Chapter 5) to facilitate the use of this document; ---Added technical requirements (see Chapter 6) to facilitate the use of this document; The following editorial changes have been made to this document. ---Deleted footnote a in Table 1 and added footnote a in Table 1; ---Include the limit deviation of Note 3 in Chapter 3 in Table 1; ---Changed Pitch in Table A.1 in Appendix A to P. 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 Tool Standardization Technical Committee (SAC/TC91). This document was drafted by. Chengdu Tool Research Institute Co., Ltd., Changzhou Dingsen Transmission Technology Co., Ltd. The main drafters of this document. Deng Zhiguang, Zhang Jianjun, Yang Fan, Zhou Jiao, Shen Shichang. This document was first published in.2006 and this is the first revision. R series tapered pipe thread round die

1 Scope

This document specifies the types, dimensions, marking examples and technical requirements for R series tapered pipe thread circular dies. This document is applicable to R series conical pipe thread circular die for processing 55° sealed pipe threads (see GB/T 7306.1, GB/T 7306.2) manufacture.

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 970.2 Round die Part 2.Technical conditions

3 Terms and definitions

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

4 Type Dimensions

The type and basic dimensions of R series tapered pipe thread circular die are as specified in Figure 1 and Table 1. figure 1 ......

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