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GB/T 12245-2025: Methods of performance test for pressure reducing valves
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 12245-2025	English	359	Add to Cart	4 days [Need to translate]	Methods of performance test for pressure reducing valves
GB/T 12245-2006	English	289	Add to Cart	3 days [Need to translate]	Methods of performance test for pressure reducing valves
GB/T 12245-1989	English	279	Add to Cart	3 days [Need to translate]	Methods of performance test for pressure reducing valves

GB/T 12245-2025: Methods of performance test for pressure reducing valves

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ICS 23.060.99 CCSJ16 National Standards of the People's Republic of China Replaces GB/T 12245-2006 Pressure reducing valve performance test method 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.Test Apparatus and Measuring Instruments 1 4.1 Test Apparatus 1 4.2 Pressure taps and connecting pipes 3 4.3 Measuring Instruments 4 5.Test Methods 4 5.1 Shell Test 4 5.2 Sealing performance test 4 5.3 Voltage regulation performance test 6 5.4 Flow Test 6 5.5 Flow Characteristic Test 7 5.6 Pressure Characteristic Test 8 5.7 Continuous Operation Test 8 5.8 Outlet pressure dynamic and static pressure rise test 10 6 Test Report 10 6.1 Test Record 10 6.2 Report Content 10 Appendix A (Informative) Performance Test Report Form 11 for Pressure Reducing Valve Appendix B (Informative) Continuous Operation Test Report Form 12 Reference 13 Figure 1.Schematic diagram of a performance testing system for an incompressible (liquid) medium pressure reducing valve (straight-through type) Figure 2.Schematic diagram of a performance test system for an incompressible (liquid) medium pressure reducing valve (angle type) Figure 3.Schematic diagram of a performance testing system for a compressible medium (gas) pressure reducing valve (straight-through type) 2 Figure 4.Schematic diagram of a performance testing system for compressible medium (gas) pressure reducing valves (angle type) 3 Figure 5.Schematic diagram of pressure tapping hole 3 Figure 6.Schematic diagram of the gas tightness test system. Figure 7.Schematic diagram of the liquid seal test system. Figure 8.Schematic diagram of the sealing test system (pressure rise) 6 Figure 9.Schematic diagram of the continuous operation test system. Table 1 Recommended pressure tap diameter (b) 4 Table 2.Duration of Sealing Test (5 days) Table 3 Number of motion tests (non-metallic diaphragm) 8 Table 4 Recommended operating frequency of pressure reducing valve 9 Table A.1 Performance Test Report of Pressure Reducing Valve (Table 11) Table B.1 Continuous Operation Test Report Table 12

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 12245-2006 "Test Methods for Performance of Pressure Reducing Valves". Compared with GB/T 12245-2006, except for structural adjustments... Aside from integration and editorial changes, the main technical changes are as follows. a) The term "KV value" and its definition have been removed (see Chapter 3 of the.2006 edition); b) The requirement for pre-trial agreements has been removed (see 4.1 in the.2006 edition); c) The schematic diagram of the performance testing system has been modified (see 4.1.1, 4.5 of the.2006 version); d) Requirements for pressure taps and connecting pipes have been added (see 4.2); e) Increased instrument accuracy requirements for temperature and flow measurements (see 4.3.2, 4.3.3); f) The steam test medium has been added (see 5.2.1, 5.3.1, 5.7.2); g) The sealing test method has been modified for situations where the leakage of the pressure reducing valve is inconvenient to measure or requires a certain back pressure to achieve a seal (see...). 5.2.3.4 (6.2.3.2 in the.2006 version); h) The flow test method for test media of ambient temperature air and steam has been modified (see 5.4, 6.4 in the.2006 edition); i) Added resilient sealing structures with a nominal size greater than or equal to DN250 and metal seals with a nominal size greater than or equal to DN300. Requirements for the number of operational tests of the entire machine with metal sealing structures (see 5.7.1.1); j) An additional test method for dynamic and static pressure rise at the outlet has been added (see 5.8). 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 Chongqing Chuanyi Adjustment Center. Jie Valve Co., Ltd., Jiangsu Tenglong Petrochemical Machinery Co., Ltd., Nanchang University, Hangzhou Chunjiang Valve Co., Ltd., China National Petroleum Corporation Limited Liability Company Dushanzi Petrochemical Branch, Shanghai Biaoyi Valve Co., Ltd., Tianjin Better Fluid Control Valve Co., Ltd., Beijing Aerospace Petrochemical Technical Equipment Engineering Co., Ltd., Guangdong Special Equipment Inspection and Research Institute, Harbin Special Equipment Supervision and Inspection Institute, Zhejiang Diaizhi Control Technology Co., Ltd., Zhejiang Haiyi Valve Co., Ltd., Shandong Yibaitong Valve Co., Ltd., Jiangsu Suyuan Valve Machinery Co., Ltd. Zhejiang Hualong Jushui Technology Co., Ltd., Danyang Zhongxin Huahai Clean Energy Co., Ltd., Gaote Holding Group Co., Ltd., Taizhou Shutai Fluid Control Equipment Co., Ltd., Zhuhai Edison Energy Saving Technology Co., Ltd., Shanghai Haogu Machinery Industry Co., Ltd., Zhejiang O-Film Oil Equipment Co., Ltd., Fushun Special Equipment Supervision and Inspection Institute. The main drafters of this document are. Peng Lin, Jin Weihua, Zhang Jian, Dai Yiming, Tu Wenfeng, Pan Jicun, Li He, Huang Zhimin, Li Dongming, and Zheng Xiaodong. Qiu Chuiyu, He Shanlin, Tang Dongdong, Yang Xinshen, Lü Guoqin, Han Wenhao, Ge Bing, Liu Jiaqiang, Chen Yuxi, Ying Youbing, Gao Dayong, Yang Wen, Zhang Limin Liu Jingxin. This document was first published in 1989, revised for the first time in.2006, and this is the second revision. Pressure reducing valve performance test method

1 Scope

This document describes the test apparatus and measuring instruments, test methods, and test reports for the performance testing of pressure reducing valves. This document applies to the testing of pilot-operated and direct-acting pressure reducing valves used in industrial pipelines. Other types of pressure reducing valves can be tested using this document as a reference.

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 12244 General requirements for pressure reducing valves GB/T 13927 Pressure Testing of Industrial Valves

3 Terms and Definitions

The terms and definitions defined in GB/T 12244 apply to this document. 4.Test apparatus and measuring instruments 4.1 Test Apparatus 4.1.1 Schematic diagram of pressure reducing valve performance test system is shown in Figures 1 to 4. Index number explanation. 1 --- Filter; 4, 6 --- Pressure gauges; 2, 8 --- Temperature instrument; 5 --- Valve being measured; 3, 9 --- Throttling valve; 7 --- Flow meter. Figure 1.Schematic diagram of a performance testing system for incompressible (liquid) medium pressure reducing valves (straight-through type) ...