GB/T 241-2025 English PDF

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GB/T 241-2025: Metallic materials - Tube - Hydrostatic pressure test
Status: Valid

GB/T 241: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 241-2025	209	Add to Cart	3 days	Metallic materials - Tube - Hydrostatic pressure test	Valid
GB/T 241-2007	189	Add to Cart	3 days	Metal materials -- Tube -- Hydrostatic pressure test	Valid
GB/T 241-1990	199	Add to Cart	2 days	Metal tubes--Hydrostatic pressure testing	Obsolete

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Basic data

Standard ID: GB/T 241-2025 (GB/T241-2025)
Description (Translated English): Metallic materials - Tube - Hydrostatic pressure test
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H23
Classification of International Standard: 77.040.10
Word Count Estimation: 10,177
Date of Issue: 2025-06-30
Date of Implementation: 2026-01-01
Older Standard (superseded by this standard): GB/T 241-2007
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 241-2025: Metallic materials - Tube - Hydrostatic pressure test

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT241-2025
ICS 77.040.10 CCSH23 National Standard of the People's Republic of China Replaces GB/T 241-2007 Hydraulic test method for metallic pipes Released on June 30, 2025 Implementation on January 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 241-2007 "Methods of hydraulic test for metal pipes". Compared with GB/T 241-2007, except for the structural adjustment and In addition to editorial changes, the main technical changes are as follows. a) The name of the standard has been changed; b) The scope of application of the document has been changed (see Chapter 1, Chapter 1 of the.2007 edition); c) Change “maximum test pressure” to “specified test pressure” (see 3.1, 3.1 of the.2007 edition); d) The definition of “pressure transmission medium” has been changed (see 3.3, 3.3 of the.2007 edition); e) Change “pressurization speed” to “pressurization rate” (see 3.4, 3.4 of the.2007 edition); f) Change “pressure relief speed” to “pressure relief rate” (see 3.5, 3.5 of the.2007 edition); g) The definition of "leakage" has been deleted (see 3.6 of the.2007 edition); h) The content of “Test Principles” has been changed (see Chapter 4,.2007 edition); i) The content of "Test Equipment and Instruments" has been changed, and a reference to JJG52 has been added (see Chapter 5, Chapter 4 of the.2007 edition); j) Added the specimen length requirements and calculation formula (see Chapter 6); k) The requirements for pressurization rate and pressure relief rate have been changed, and the requirement for test pressure stabilization time has been deleted (see 7.2, 6.4 of the.2007 edition); l) Added requirements for the pressure fluctuation range during the test (see 7.3); m) Added the "Test Procedure" chapter (see Chapter 8); n) The content of “Test Results Evaluation” has been changed (see Chapter 9, Chapter 7 of the.2007 edition); o) Change "Appendix A" from an informative appendix to a normative appendix; p) Added numerical rounding rules for calculated specified test pressure values (see Appendix A.3); q) Change "Appendix B" from an informative appendix to a normative appendix; r) The minimum length requirement for the test specimen has been deleted (see B.2 of the.2007 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Iron and Steel Association. This document is under the jurisdiction of the National Technical Committee on Steel Standardization (SAC/TC183). This document was drafted by. Tianjin Steel Pipe Manufacturing Co., Ltd., Zhejiang Zhongda New Materials Co., Ltd., Zhejiang Jinzhou Pipeline Technology Co., Ltd. Co., Ltd., Shanxi Taigang Stainless Steel Pipe Co., Ltd., Jiangsu Youfa Steel Pipe Co., Ltd., Jingjiang Special Steel Co., Ltd., Shenzhen Wanchuang Testing Equipment Co., Ltd., Handan Zhengda Pipe Group Co., Ltd., Changshu Huaxin Special Steel Co., Ltd., Tianjin Youfa Steel Pipe Group Co., Ltd. Co., Ltd., Metallurgical Industry Information Standards Research Institute. The main drafters of this document are. Zhao Yanyan, Han Yongming, Chen Xiaofu, Yang Weifang, Niu Bo, Wang Lihong, Wang Sheng, Huang Xing, Wang Yuanzhi, Qin Lijun, Zhao Fuliang, Li Qi, Hou Huining, Xie Guannan, Wang Guoxing, Xu Yaosong, Zhong Xuequan, Zhang Xiao, Zhou Bo, Wang Zhi, Sima Qiongjie, Dong Li, Wang Shuo, Hao Yuhua, Zhen Xiaochuan and Guo Bicheng. This document was first issued in 1982, revised for the first time in.1990, revised for the second time in.2007, and this is the third revision. Hydraulic test method for metallic pipes Warning. People who use this document should have practical experience in regular laboratory work. This document does not reflect all possible safety Any user shall be responsible for taking appropriate safety and health measures and ensuring that the conditions stipulated by relevant national laws and regulations are met.

1 Scope

This document specifies the principles, test equipment and instruments, specimens, test requirements, test procedures, and test results of the hydraulic test method for metal pipes. Assessment and test reports. This document applies to the tightness and/or strength tests of steel, cast iron and non-ferrous metal pipes under the action of internal pressure of pressure transmission media.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. JJG52 Verification procedures for elastic element type general pressure gauges, pressure vacuum gauges and vacuum gauges

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 The test pressure during the test stabilization time (3.2). 3.2 Holdtime Maintaining the specified test pressure (3.1) for a period of time 3.3 The liquid medium that transmits pressure is usually water, oil, or emulsion. 3.4 Pressure applying rate The change in pressure per unit time during pressure loading. 3.5 pressure removal rate pressure removal rate The change in pressure per unit time during pressure unloading. 3.6 Destructive test destroy test A test in which the test pressure is continuously increased until leakage or rupture occurs in the metal pipe. ......

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