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GB/T 12229-2025: General purpose Industrial valves - Technical specification for carbon steel castings
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 12229-2025	English	299	Add to Cart	3 days [Need to translate]	General purpose Industrial valves - Technical specification for carbon steel castings
GB/T 12229-2005	English	189	Add to Cart	3 days [Need to translate]	General purpose industrial valves -- Specification of spheroidal graphite iron castings
GB/T 12229-1989	English	199	Add to Cart	2 days [Need to translate]	General purpose industrial valves--Specification of carbon steel castings

GB/T 12229-2025: General purpose Industrial valves - Technical specification for carbon steel castings

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ICS 23.060.01 CCSJ16 National Standards of the People's Republic of China Replaces GB/T 12229-2005 Technical Specifications for Carbon Steel Castings of General Valves Published on 2025-10-31 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of contents

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Technical Requirements 1 4.1 Casting Process and Evaluation 1 4.2 Chemical composition 2 4.3 Mechanical Properties 2 4.4 Heat Treatment 3 4.5 Dimensions and Weight 3 4.6 Appearance 3 4.7 Shell Test 3 4.8 Welding Repair 3 5.Test Methods 4 5.1 Chemical Composition Analysis 4 5.2 Mechanical property test 4 5.3 Dimensional Inspection 5 5.4 Appearance Inspection 5 5.5 Shell Test 5 6.Labeling and quality certificate 5. 6.1 Identification 5 6.2 Quality Certificate 5 7.Additional Requirements 5 Appendix A (Informative) Additional Requirements 6 References 9 Table 1 Chemical Composition (Mass Fraction) 2 Table 2 Results of room temperature tensile property tests Table A.1 Average Energy Values of Impact Absorption 7 Table A.2 High Temperature Tensile Test 7 Table A.3 Acceptable Levels for Defects such as Porosity, Sand Inclusion, Slag Inclusion, Shrinkage Cavities, and Shrinkage Porosity. 8

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 12229-2005 "Technical Conditions for Carbon Steel Castings for General Valves". Compared with GB/T 12229-2005, Apart from structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application has been changed (see Chapter 1, Chapter 1 of the.2005 edition); b) Added casting process and evaluation requirements (see 4.1); c) The chemical composition, mechanical properties, and heat treatment requirements have been changed (see 4.2–4.4, 3.1–3.3 of the.2005 edition); d) Size and weight requirements have been changed (see 4.5, 3.4.1 of the.2005 edition); e) Added requirements for visual inspection (see 4.6); f) Added requirements for shell testing (see 4.7); g) The welding repair requirements have been changed (see 4.8, 3.4.5 of the.2005 edition); h) The requirements for test methods and inspection rules have been changed (see Chapter 5, Chapter 4 of the.2005 edition); i) The labeling requirements have been changed (see 6.1, Chapter 5 of the.2005 edition), and a certificate of quality requirement has been added (see 6.2); j) Additional requirements have been added (see Chapter 7). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee on Valve Standardization (SAC/TC188). This document was drafted by. Jiangsu Wanheng New Material Technology Co., Ltd., Hefei General Machinery Research Institute Co., Ltd., and China Shenhua Coal-to-Oil Co., Ltd. Ordos Coal-to-Oil Branch of Chemical Co., Ltd., Wuhan Huake Energy & Environment Technology Co., Ltd., Jiangsu Tenglong Petrochemical Machinery Co., Ltd. Company, Taigang Alloy (Zhongshan) Co., Ltd., Southwest Pipeline Co., Ltd. of China Pipeline Network Group, Zhejiang Petrochemical Valve Co., Ltd., Jiangsu Jiangyuan Machinery Co., Ltd., Jiangsu Mingtong Fulu Fluid Control Equipment Co., Ltd., Yancheng Aokai Mingtong Valve Co., Ltd., Chengdu Chenggao Valve Co., Ltd. Limited Liability Company, Zhejiang Bell Control Valve Co., Ltd., Hefei Tong'an Engineering Machinery Equipment Supervision Co., Ltd., Tianjin Beter Fluid Control Valve Door Co., Ltd., Shanghai Ya'ao Valve Co., Ltd., Zhejiang Linuo Fluid Control Technology Co., Ltd., Shandong Tianli Machinery Casting Co., Ltd. Company, Anhui Baihu Valve Factory Co., Ltd., Jiangsu Hengda Machinery Manufacturing Co., Ltd., Zhejiang Moenda Valve Co., Ltd., Sichuan Zhongyou Leyi Energy Equipment Manufacturing Co., Ltd., Beike Valve Group Co., Ltd., Danfoss (Tianjin) Co., Ltd., and Asmi Valve Co., Ltd. Company, Fluorose Special Valves (Suzhou) Co., Ltd. The main drafters of this document are. Cao Qiao, Jin Shujun, Hu Qingbin, Zhang Chuanhu, Ma Chao, Dai Yiming, Sun Zhibiao, Zhang Huandong, Wang Zhongmiao, and Han Xuefeng. Huang Jingsheng, Wang Xin, Zheng Yuchuan, Lin Feng, Zhou Qinkai, Li Dongming, Liu Liyan, Chen Xiaolin, Yang Zhisen, Huang Jie, Dai Longning, Ye Mankai, Peng Guojun Shen Wenzhong, Wang Zhimei, Zheng Yaoyao, Yuan Tianfa. This document was first published in 1989, revised for the first time in.2005, and this is the second revision. Technical Specifications for Carbon Steel Castings of General Valves

1 Scope

This document specifies the technical requirements, test methods, marking and quality certificates, and additional requirements for carbon steel castings used in general valves. This document applies to the design, production, and inspection of pressure-bearing carbon steel castings for general-purpose valves; it can be used as a reference for non-pressure-bearing carbon steel castings.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 222 Permissible deviations in the chemical composition of finished steel GB/T 223 (all parts) Chemical Analysis Methods for Iron and Steel and Alloys GB/T 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature GB/T 4336 Determination of Multi-Element Content in Carbon Steel and Medium-Low Alloy Steels by Spark Discharge Atomic Emission Spectrometry (Conventional Method) GB/T 5678 Sampling Method for Spectroscopic Analysis of Cast Alloys GB/T 6414 Dimensional tolerances, geometric tolerances and machining allowances for castings GB/T 9452-2023 Method for determining the effective heating zone of a heat treatment furnace GB/T 11351 Weight tolerance of castings GB/T 13927 Pressure Testing of Industrial Valves GB/T 15056 Method for evaluating the surface roughness of castings GB/T 15169 Skill Assessment for Steel Fusion Welding GB/T 20066 Sampling and Sample Preparation Methods for the Determination of Chemical Composition of Steel and Iron GB/T 26480 Inspection and Testing of Valves GB/T 40800 Specification for Welding Procedure Qualification of Cast Steel Parts GB/T 40805 General Technical Conditions for Delivery and Acceptance of Cast Steel Parts JB/T 7927 Appearance Quality Requirements for Cast Steel Valve Parts

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined. 4.Technical Requirements 4.1 Casting process and evaluation 4.1.1 Casting process The casting process should be evaluated and approved before it can be used for mass production of castings. ...