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GB/T 21385-2025: Metal-seated ball valve
Status: Valid
GB/T 21385: Evolution and historical versions
| Std ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status |
| GB/T 21385-2025 | English | 359 |
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Metal-seated ball valve
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| GB/T 21385-2008 | English | 279 |
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Metal-seated ball valve
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Standard similar to GB/T 21385-2025 GB/T 21384 | GB/T 24921.1 | GB/T 24921.2 | GB/T 21387 | Basic data | Standard ID | GB/T 21385-2025 (GB/T21385-2025) | | Description (Translated English) | Metal-seated ball valve | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J16 | | Classification of International Standard | 23.060.10 | | Word Count Estimation | 18,150 | | Date of Issue | 2025-10-31 | | Date of Implementation | 2026-05-01 | | Older Standard (superseded by this standard) | GB/T 21385-2008 | | Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China | GB/T 21385-2025: Metal-seated ball valve---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 23.060.10
CCSJ16
National Standards of the People's Republic of China
Replaces GB/T 21385-2008
Metal-sealed ball valve
Metal-seated balvalve
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 2
4.Structural Type 2
5 Technical Requirements 4
6.Materials 7.
7.Test Methods 8.
8 Inspection Rules 9
9.Signs and nameplates
10 Protection, Packaging, Storage and Transport 10
11 Supply Requirements 10
Appendix A (Informative) Metal-Sealed Ball Valve Ordering Contract Data Sheet 11
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 21385-2008 "Metal-Sealed Ball Valves". Compared with GB/T 21385-2008, the only changes are structural adjustments and editing.
Aside from the gender changes, the main technical changes are as follows.
a) The scope of application has been changed and weight requirements have been added (see Chapter 1, Chapter 1 of the.2008 edition);
b) The terms and definitions for “one-way seal” and “two-way seal” have been removed (see 3.2 and 3.3 in the.2008 edition);
c) A typical structural diagram of a high-temperature fixed ball valve has been added (see Figure 3);
d) The requirements for pressure-temperature ratings have been changed (see 5.1,.2008 edition of 5.1);
e) Increased strength requirements for shell connections (see 5.6.1);
f) The requirement for gaskets between housing connections has been removed (see 5.6.3 in the.2008 edition);
g) Increased requirements for valve seat sealing pairs (see 5.7);
h) The connection requirements for the packing gland have been changed (see 5.9, 5.8 in the.2008 edition);
i) Anti-static requirements have been added (see 5.13);
j) The sphere requirements have been changed (see 5.14, 5.12 in the.2008 version);
k) Increased the pressure relief requirement for the valve body cavity (see 5.22);
l) Added requirements for lifting lugs (see 5.23);
m) Assembly and debugging requirements have been removed (see Chapter 7 of the.2008 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., Chengdu Chenggao Valve Co., Ltd., and Key Core Components of General Machinery.
Basic Components Innovation Center (Anhui) Co., Ltd., Chaoda Valve Group Co., Ltd., Suzhou Antway Industrial Intelligent Technology Co., Ltd.
Company, Zhejiang Linuo Fluid Control Technology Co., Ltd., Sichuan Jingkong Valve Manufacturing Co., Ltd., Shenjiang Valve Co., Ltd., Tianjin Bailizhan
Fa Group Co., Ltd., Anhui Tunxi High Pressure Valve Co., Ltd., Zhejiang Petrochemical Valve Co., Ltd., Xuanda Industrial Group Co., Ltd.
Lanzhou High Pressure Valve Co., Ltd., Yuanda Valve Group Co., Ltd., Shanghai Hongsheng Special Valve Manufacturing Co., Ltd., Jinggong Valve Group
Limited Liability Company, Lianggu Valve Group Co., Ltd., Zhejiang Bell Control Valve Co., Ltd., Jiangsu Yifa Co., Ltd., Beijing Aerospace
Petrochemical Technology Equipment Engineering Co., Ltd., Jiangsu Shengtai Valve Co., Ltd., Weiduli Valve Co., Ltd., Yancheng Aokaimingtong Valve Co., Ltd.
Company, Jiangsu Mingtong Fulu Fluid Control Equipment Co., Ltd., Sichuan Feiqiu (Group) Co., Ltd., Lixin Valve Group Co., Ltd., Yonglong
Valve Co., Ltd., Dongchen Intelligent Technology Co., Ltd., Hangzhou Special Equipment Inspection and Research Institute (Hangzhou Special Equipment Emergency Response Center)
(Heart), Henan Quanshun Fluid Control Technology Co., Ltd., Tianjin Better Fluid Control Valve Co., Ltd., Kaiweixi Valve Group Co., Ltd.
Wuxi Baoniu Valve Co., Ltd., Guogong Holding Group Co., Ltd., Hangzhou Chunjiang Valve Co., Ltd., Suzhou Penghan Valve Co., Ltd., Jinbo
Valve Group Co., Ltd., Jiangsu Jiangyuan Machinery Co., Ltd., Tanggong Valve Group Co., Ltd., Jiangsu Tenglong Petrochemical Machinery Co., Ltd.
Zigong Xindiper Valve Co., Ltd., Anhui Fangxing Industrial Co., Ltd., Wuxi Skaur Automatic Control Equipment Co., Ltd., Avalo
Ti Control Co., Ltd., Chaohe Valve Group Co., Ltd., Beize Valve Group Co., Ltd., Zhejiang Lianda Valve Co., Ltd., and Kestone Valve
Limited Liability Company, Junpin Group Co., Ltd., Shuangheng Valve Group Co., Ltd., Shanghai Ya'ao Valve Co., Ltd., Tianjin Kars Valve Co., Ltd.
Limited Liability Company, Hangda Valve Group Co., Ltd., Zhejiang Deca Control Valve & Instrument Co., Ltd., Zhejiang Chaozhong Valve Manufacturing Co., Ltd., Shanghai Shuanggao
Valve (Group) Co., Ltd., Qingdao Weilong Valve Co., Ltd., Ningbo Huidefeng Copper Industry Co., Ltd., and Oulam Valve Technology Co., Ltd.
Company, Zhejiang Moenda Valve Co., Ltd., Ouming Valve Group Co., Ltd., Kaitai Valve (Group) Co., Ltd., Newtock Fluid Control Co., Ltd.
The company, Zhejiang Biaosheng Valve Manufacturing Co., Ltd., Yuefeng Valve Manufacturing Co., Ltd., Wuxi Kaierke Instrument Valve Co., Ltd., and Zhejiang Huizheng Valve
Door Technology Co., Ltd., Zhengnan Valve Co., Ltd., Gaote Holding Group Co., Ltd., Guocheng Valve Group Co., Ltd., Zhejiang Guanzheng Valve
Door Co., Ltd., Zhongfa Holding (Group) Co., Ltd., Tehong Valve Group Co., Ltd., Zhengmao Valve Co., Ltd., and Dide Valve Group
Limited Liability Company, Shandong Yibaitong Valve Co., Ltd., Yongjia Yuelong Sealing Parts Co., Ltd., Yongjia Tongqiu Valve Co., Ltd., Chengdu Huake Valve
Manufacturing Co., Ltd., Tikos Technology Group Lishui Fluid Equipment Co., Ltd., Tianjin Tanggu Watts Valve Co., Ltd.
The main drafters of this document are. Huang Mingya, Zeng Heyou, Peng Lin, Qiu Xiaolai, Li Yufei, Wu Yefei, Feng Cheng, Ye Jihan, Hong Chunjie, and Wu Zhijun.
He Xiangping, Fan Wendong, Chen Wenxin, Zhang Chen, Tan Yuying, Xie Jianguo, Pan Junxiang, Lin Feng, Qian Yufeng, Ding Yingren, Ji Huijian, Xia Chongmao, Li Bo,
Zhou Yong, Li Zhao, Pan Daode, Yu Jinxian, Luo Linhua, Wang Fei, Wu Hongtao, Li Dongming, Lin Zuanze, Bian Hongfei, Jing Dongyang, Zhang Zihao, Chen Jian, Dai Shangpeng
Wu Han, Xiang Ce, Dai Yiming, Li Ke, Fang Chao, Yu Xuejun, Xie Zhengze, Zhang Weilong, Shao Chun, Yu Liexin, Jin Huichao, Wang Ronghao, Huang Wenyi, Lan Yongjun
Li Zhi, Jiang Huipan, Kang Jian, Wang Zhiyong, Li Li, Zhang Huiting, Feng Zhenhua, Jin Zhiyuan, Tan Guiyuan, Xiang Guangxiu, Zhu Jingjing, Zhang Tao, Liang Shitian
Ye Xinkai, Wang Yongxing, Li Xianming, Xiang Weihui, Chen Yuxi, Zhan Guoyou, Yu Ce, Chen Xing, Sun Baoqiu, Lin Shengyuan, Zhang Bo, Lü Guoqin, Yang Yuncao
Chen Jianlei, Liu Guoqiang, Liu Feifei, Wang Zhanbo.
This document was first published in.2008, and this is its first revision.
Metal-sealed ball valve
1 Scope
This document specifies the structural types, technical requirements, materials, test methods, inspection rules, markings and nameplates, and anti-corrosion features of metal-sealed ball valves.
Protection, packaging, storage and transportation.
This document applies to nominal sizes DN15~DN800 and nominal pressures PN16~PN400, and nominal sizes NPS⅟~NPS32 and...
Nominal pressure Class 150~Class 2500, applicable temperature -29℃~550℃, applicable media include gas, liquid, gas-solid, gas-liquid, and solid-liquid mixtures.
Design, production and inspection of flanged, welded or threaded metal-sealed ball valves for gas-solid-liquid multiphase flow.
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 70.1 Socket head cap screws
GB/T 196 Basic Dimensions of Ordinary Threads
GB/T 197 Tolerances for Standard Threads
GB/T 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature
GB/T 897 Double-ended studs bm=1d
GB/T 898 Double-ended studs bm=1.25d
GB/T 901 Equal Length Double-Ended Studs, Class B
GB/T 4622 (all parts) Spiral wound gaskets for pipe flanges
GB/T 5782 Hex head bolts
GB/T 5783 Hex head bolts with full thread
GB/T 6175 Type 2 Hex Nut
GB/T 7306 (all parts) 55° Sealing Pipe Thread
GB/T 9124 (all parts) Steel pipe flanges
GB/T 9128 (all parts) Metal ring gaskets for steel pipe flanges
GB/T 12220 Industrial Valve Marking
GB/T 12221 Structural Length of Metal Valves
GB/T 12223 Connection of Partial Rotary Valve Actuators
GB/T 12224 General requirements for steel valves
GB/T 12228 Technical Specification for Carbon Steel Forgings of General Valves
GB/T 12229 Technical Specification for Carbon Steel Castings of General Valves
GB/T 12230 Technical Requirements for Stainless Steel Castings for General Valves
GB/T 12716 60° Sealing Pipe Thread
GB/T 13927 Pressure Testing of Industrial Valves
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