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GB/T 12232-2025: General purpose industrial valves - Flanged iron gate valves
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 12232-2025	English	279	Add to Cart	3 days [Need to translate]	General purpose industrial valves - Flanged iron gate valves
GB/T 12232-2005	English	339	Add to Cart	3 days [Need to translate]	General purpose industrial valve -- Flanged iron gate valves
GB/T 12232-1989	English	599	Add to Cart	4 days [Need to translate]	General purpose industrial valves--Flanged iron gate valves

GB/T 12232-2025: General purpose industrial valves - Flanged iron gate valves

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ICS 23.060.30 CCSJ16 National Standards of the People's Republic of China Replaces GB/T 12232-2005 General purpose valve flange connection iron gate valve 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.Structural Type 1 5.Technical Requirements 3 5.1 Pressure-temperature ratings of gate valves 3 5.2 Shell wall thickness 3 5.3 Valve body and valve cover 4 5.4 Gate 5 5.5 Valve stem and valve stem nut 5 5.6 Packing and Packing Pads 6 5.7 Packing gland 6 5.8 Bracket 6 5.9 Handwheel 6 5.10 Indicator 6 5.11 Operation of Gate Valves 6 5.12 Bypass and Sewage Discharge 7 5.13 Hanging rings and feet 7 5.14 Housing and Sealing Tests 7 5.15 Hygiene Requirements 7 5.16 Materials 7 6.Test Methods 8. 6.1 Shell wall thickness measurement 8 6.2 Valve stem diameter measurement 8 6.3 Opening and closing operation test 8 6.4 Pressure Test 8 6.5 Mechanical properties of valve body material 8 6.6 Hygiene 8 7 Inspection Rules 8 7.1 Factory Inspection 8 7.2 Type Testing 9 8.Mark 9. 9.Supply Requirements Figure 1.Schematic diagram of a typical rising stem gate valve. Figure 2.Schematic diagram of a typical non-rising stem gate valve. Table 1 Minimum wall thickness of the shell 4 Table 2 Minimum valve stem diameter 5 Table 3 Specifications of Bypass Valves 7 Table 4.Materials of Main Components of Gate Valves 7 Table 5.Inspection Items (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 12232-2005 "General Valves - Flanged Iron Gate Valves". Compared with GB/T 12232-2005, except for... Aside from structural adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed (see Chapter 1, Chapter 1 of the.2005 edition); b) The requirements for shell wall thickness have been changed (see Table 1,.2005 edition); c) The requirements for the gate have been changed (see 5.4, 4.5.4 in the.2005 edition); d) The minimum diameter requirement for the valve stem has been changed (see Table 2, Table 3 in the.2005 edition); e) The requirements for the packing material have been changed (see 5.6, 4.7 of the.2005 edition); f) Added requirements for the installation direction, operation, lifting rings, and foundation of gate valves (see 5.11, 5.13); g) The requirement for internal cavity cleanliness has been removed (see 4.12 in the.2005 edition); h) The maximum opening height requirement for gate valves has been removed (see Table 4 in the.2005 edition); i) Increased requirements for the sealing leakage level of the sealing pair (see 5.14.2); j) Increased hygiene requirements (see 5.15); k) The material requirements have been changed (see Table 4, Table 6 in the.2005 edition); l) Added testing methods for hygiene requirements (see 6.6); m) The inspection rules have been changed (see Chapter 7, Chapter 6 of the.2005 edition). 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. Hefei General Machinery Research Institute Co., Ltd., Hefei General Electromechanical Products Testing Institute Co., Ltd., and Anhui Hongxing Valve Co., Ltd. Door Co., Ltd., Hangzhou Chunjiang Valve Co., Ltd., Jiangsu Tenglong Petrochemical Machinery Co., Ltd., China Valve Holding (Group) Co., Ltd., CNNC Suzhou Valve Science and Technology Industry Co., Ltd., Anhui Baihu Valve Factory Co., Ltd., Shanghai Guanlong Valve Energy-Saving Equipment Co., Ltd., Chengdu Chuanli Intelligent Fluid Equipment Co., Ltd., Hefei Tong'an Engineering Machinery Equipment Supervision Co., Ltd., Qingdao Weilong Valve Co., Ltd. Shanghai Biaoyi Valve Co., Ltd., Ningbo Yiji Valve Manufacturing Co., Ltd., Zhejiang Hualong Jushui Technology Co., Ltd., and Shanghai Hang Technology Group Limited Liability Company, Anhui Fangxing Industrial Co., Ltd., Anhui Tongdu Fluid Technology Co., Ltd., Beijing Aerospace Petrochemical Technology Equipment Engineering Limited Liability Company, Lixin Valve Group Co., Ltd., Jinbo Valve Group Co., Ltd., Yuanda Valve Group Co., Ltd., Yangquan Valve Co., Ltd. Limited Liability Company, Gaote Holding Group Co., Ltd., Kaistone Valve Co., Ltd., Shuangheng Valve Group Co., Ltd., Anhui Keli Valve Industry Co., Ltd. Company, Tongling Xingrong Valve & Pipe Fittings Co., Ltd., Benxing Valve Manufacturing Co., Ltd., Tianhong Valve Technology (Quanzhou) Co., Ltd., Shandong Yibaitong Valve Door Co., Ltd., Shanxi Zhongli Flavour Co., Ltd., Dazhong Valve Group Energy Co., Ltd., and Guangzhou Xinxing Valve Industry Co., Ltd. The main drafters of this document are. Wang Xiaojun, Jin Weihua, Yan Jie, Pan Haoming, Dai Yiming, Chen Chunjian, Wu Rurong, Huang Jie, Xue Yunjing, and Zhang Wei. Zhou Qinkai, Zhang Huiting, Huang Zhimin, Zhou Zhenfeng, Ge Bing, Xie Hongwen, Fang Chao, Wu Jie, Ding Yingren, Jin Jianhai, Zhou Zongkui, Qiao Qing, Liang Zhibao, Chen Yuxi Teng Nan, Huang Zhenzong, Wang Junping, Xu Liangliang, Chen Jinzuan, Hong Xiaoliang, Lü Guoqin, Qin Zengwei, Jin Bo, Yi Mei. This document was first published in 1989, revised for the first time in.2005, and this is the second revision. General purpose valve flange connection iron gate valve

1 Scope

This document specifies the structural type, technical requirements, test methods, inspection rules, marking, and supply requirements for flanged iron gate valves. This document applies to flange connections made of gray cast iron and ductile iron with nominal pressure PN2.5~PN25 and nominal size DN50~DN2000. Design, production and inspection of gate valves (hereinafter referred to as "gate valves").

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 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature GB/T 5796 (all parts) Trapezoidal Thread GB/T 12220 Industrial Valve Marking GB/T 12221 Structural Length of Metal Valves GB/T 12222 Connection of multi-turn valve actuators GB/T 13927 Pressure Testing of Industrial Valves GB/T 13927-2022 Pressure Testing of Industrial Valves GB/T 17219 Safety Evaluation Standard for Drinking Water Transmission and Distribution Equipment and Protective Materials GB/T 17241.1 Cast iron pipe flanges - Part 1.PN series JB/T 7928 Supply Requirements for Industrial Valves

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined. 4.Structural Type The typical structure of a rising stem gate valve is shown in Figure 1, and the typical structure of a non-rising stem gate valve is shown in Figure 2. ...