GB/T 1149.12-2023 English PDF

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Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 1149.12-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$544.00 · In stock
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GB/T 1149.12-2023: Internal combustion engines - Piston rings - Part 12: Half keystone rings made of steel
Status: Valid

GB/T 1149.12: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 1149.12-2023	544	Add to Cart	5 days	Internal combustion engines - Piston rings - Part 12: Half keystone rings made of steel	Valid
GB/T 1149.12-2013	599	Add to Cart	3 days	Internal combustion engines -- Piston rings -- Part 12: Half keystone rings made of steel	Obsolete

Similar standards

GB/T 1148 JB/T 6289 JB/T 6729 GB/T 1149.11 GB/T 1149.17 GB/T 1149.8

Basic data

Standard ID: GB/T 1149.12-2023 (GB/T1149.12-2023)
Description (Translated English): Internal combustion engines - Piston rings - Part 12: Half keystone rings made of steel
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J92
Classification of International Standard: 27.020
Word Count Estimation: 30,385
Date of Issue: 2023-12-28
Date of Implementation: 2024-07-01
Older Standard (superseded by this standard): GB/T 1149.12-2013
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 1149.12-2023: Internal combustion engines - Piston rings - Part 12: Half keystone rings made of steel

---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 27:020 CCSJ92 National Standards of People's Republic of China Replace GB/T 1149:12-2013 Internal combustion engine piston rings Part 12: Wedge-shaped steel rings Published on 2023-12-28 2024-07-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Preface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Overview 1 5 Type and marking examples 1 5:1 HK type---cylindrical 7° wedge-shaped steel ring 1 5:2 HKB type---symmetrical barrel surface 7° wedge-shaped steel ring 2 5:3 HKBA type---Asymmetric barrel surface 7° wedge-shaped steel ring (not recommended for surface nitrided rings) 4 6 Common Characteristics 5 6:1 HK type, HKB type and HKBA type rings---Surface layer structure 5 6:2 HK type, HKB type, HKBA type ring---outer/inner edge rounding 7 6:3 HK type, HKB type and HKBA type rings (fully plated and inlaid)---plating/coating thickness 7 6:4 HK type, HKB type and HKBA type rings---nitride layer depth 8 7 Elasticity coefficient 9 8 Specifications 9 Appendix A (normative) Calculation method of wedge ring measurement height h3 22 Reference 23

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 12 of GB/T 1149 "Piston Rings for Internal Combustion Engines": GB/T 1149 has published the following parts: ---Part 1: General rules; ---Part 2: Terminology; ---Part 3: Material specifications; ---Part 4: Quality requirements; ---Part 5: Inspection methods; ---Part 6: Cast iron scraper rings; ---Part 7: Rectangular cast iron rings; ---Part 8: Rectangular steel ring; ---Part 9: Trapezoidal cast iron rings; ---Part 10: Trapezoidal steel rings; ---Part 11: Wedge-shaped cast iron rings; ---Part 12: Wedge-shaped steel rings; ---Part 13: Oil rings; ---Part 14: Spiral spring oil ring; ---Part 15: Thin cast iron spiral spring oil ring; ---Part 16: Steel belt combined oil ring; ---Part 17: Steel spiral spring oil ring: This document replaces GB/T 1149:12-2013 "Internal combustion engine piston rings - Part 12: Wedge-shaped steel rings" and is the same as GB/T 1149:12- Compared with:2013, the main technical changes are as follows: a) The types of wedge-shaped steel rings have been added, and the applicable bore range of wedge-shaped steel rings has been modified (see Chapter 1, Chapter 1 of the:2013 edition); b) Added types and marking examples of wedge-shaped steel rings HKBA (see Chapter 5, Chapter 4 of the:2013 edition); c) Added PVD-related content to the general characteristics and elastic coefficient (see 6:1, 6:3, Chapter 7, 5:1, 5:3, Chapter:2013 version Chapter 6); d) In the general characteristics, elastic coefficient and specification tables, the corresponding content of HKBA type has been added (see Chapter 6, Chapter 7, Chapter 8 Chapter, Chapter 5, Chapter 6, Chapter 7 of the:2010 edition); e) Added the calculation method for the measurement height h3 of the wedge-shaped steel ring (see Appendix A): This document is equivalent to ISO 6624-4:2016 "Internal combustion engine piston rings - Part 4: Wedge steel rings": A "Terms and Definitions" chapter has been added to this document: This document has made the following minimal editorial changes: ---In order to coordinate with the existing standards, the standard name is changed to "Internal Combustion Engine Piston Rings Part 12: Wedge Steel Rings": 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 Internal Combustion Engine Standardization Technical Committee (SAC/TC177): This document was drafted by: Fujian East Asia Machinery Co:, Ltd:, Yizheng ASIMCO Double Ring Piston Ring Co:, Ltd:, Anqing Dibergz Piston Ring Co:, Ltd:, Shanghai Motor Vehicle Inspection and Certification Technology Research Center Co:, Ltd:, Zhongyuan Internal Parts Group Co:, Ltd:, Shanghai Internal Combustion Engine Research Co:, Ltd:, Beijing Foton Cummins Engine Co:, Ltd: The main drafters of this document: Ji Binjie, Shi Guanfei, Wang Xing, Guo Hua, Ji Weibin, Gao Guangdong, Yu Yu, Zheng Changbao, Li Xijian, Wu Xuling, Gong Yingli: The previous versions of this document and the documents it replaces are as follows: ---First published as GB/T 1149:12-2013 in:2013; ---This is the first revision:

Introduction

GB/T 1149 "Internal Combustion Engine Piston Rings" is a national standard that guides the design, inspection and use of internal combustion engine piston ring products in my country: Composed of 17 parts: ---Part 1: General rules: The purpose is to establish the general characteristics of piston rings (the individual dimensional characteristics are in the corresponding national standards regulations), codes, marks and logos: ---Part 2: Terminology: The purpose is to establish the classification, types, names of each part, terminology and definition: ---Part 3: Material specifications: The purpose is to establish specifications for the classification of materials used in piston rings according to their mechanical properties: ---Part 4: Quality requirements: The purpose is to establish product quality requirements that are not usually expressed on technical requirements on drawings: ---Part 5: Inspection methods: The purpose is to establish the inspection method of piston rings: ---Part 6: Cast iron scraper rings: The purpose is to establish the basic dimensions of cast iron scraper rings for piston ring models N, NM, E and EM: feature: ---Part 7: Rectangular cast iron ring: The purpose is to establish the basic dimensions of rectangular cast iron piston rings for R, B, BA and M piston ring types: inch characteristics: ---Part 8: Rectangular steel ring: The purpose is to establish the basic dimensions of rectangular steel piston rings with piston ring types R, B, BA and M: feature: ---Part 9: Trapezoidal cast iron rings: The purpose is to establish the piston ring models as T, TB, TBA, TM, K, KB, KBA and KM Basic dimensional characteristics of trapezoidal cast iron piston rings: ---Part 10: Trapezoidal steel ring: The purpose is to establish the piston ring models as T, TB, TBA, TM, K, KB, KBA and KM ladder Basic dimensional characteristics of shaped steel piston rings: ---Part 11: Wedge-shaped cast iron rings: The purpose is to establish the piston ring models of HK, HKB and HKBA wedge cast iron piston rings: Basic dimensional characteristics: ---Part 12: Wedge-shaped steel rings: The purpose is to establish the basis for wedge-shaped steel piston rings with piston ring models HK, HKB and HKBA: Characteristics of this size: ---Part 13: Oil rings: The purpose is to establish the basic dimensions of piston ring models for S-type, G-type, D-type and DV-type oil rings: feature: ---Part 14: Spiral spring oil ring: The purpose is to establish the piston ring models as DSF-C, DSF-CNP, SSF, GSF, DSF, Basic dimensional characteristics of DSF-NG and SSF-L spiral spring oil rings: ---Part 15: Thin cast iron spiral spring oil ring: The purpose is to establish the piston ring models as DSF-C, SSF, GSF, DSF and Basic dimensional characteristics of SSF-L thin cast iron spiral spring oil ring: ---Part 16: Steel belt combined oil ring: The purpose is to establish the basic dimensional characteristics of the steel belt combined oil ring: ---Part 17: Steel spiral spring oil ring: The purpose is to establish the piston ring models as SOR (R-type oil groove) and SOV (V-type oil groove): Groove) Basic dimensional characteristics of steel spiral spring oil rings: Part 1 ~ Part 5 of GB/T 1149 stipulates the common content of all piston ring products, and Part 6 ~ Part 17 respectively Specifies the characteristics of piston rings of different materials and types: This document and GB/T 1149:11 respectively specify the basic dimensional characteristics of wedge-shaped piston rings of different materials: This document gives a wide range of parameters in the general characteristics and specification tables of piston rings: When designing, designers need to base their designs on the parameters of the piston rings: Choose according to specific working conditions: Designers need to refer to other relevant standards of GB/T 1149 before conducting piston ring design and parameter selection: Internal combustion engine piston rings Part 12: Wedge-shaped steel rings

1 Scope

This document specifies the basic dimensions of wedge-shaped steel piston rings (hereinafter referred to as wedge-shaped steel rings) with piston ring models HK, HKB, and HKBA: inch characteristics: This document is applicable to wedge-shaped steel rings for reciprocating piston internal combustion engines with cylinder diameters of 50mm~160mm:

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: Note: GB/T 1149:1-2008 Piston rings for internal combustion engines Part 1: General rules (ISO 6621-4:2003, IDT)

3 Terms and definitions

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

4 Overview

Figures 1, 2, 3 and Tables 1 and 2 specify the types of wedge-shaped steel rings: Figures 4 to 10 and Tables 3 to 7 specify the general characteristics and their dimensions: Inches, Table 8 gives the elasticity correction coefficient, Table 9 gives the dimensions and elasticity:

5 Examples of types and markings

Note: The definition and measurement method of the wedge angle of a wedge-shaped steel ring are the same as that of a trapezoidal ring (see ISO 6621-2): 5:1 HK type---cylindrical 7° wedge-shaped steel ring 5:1:1 General characteristics Figure 1 gives the general characteristics of HK-type rings: See Table 9 for dimensions and stretch: The h3 value is calculated according to Appendix A: ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 1149.12-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 1149.12-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 1149.12-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 1149.12-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 1149.12-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 1149.12-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.