GB/T 12137-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12137-2025	RFQ	ASK	3 days	Methods for leakage test of gas cylinders	Valid
GB/T 12137-2015	85	Add to Cart	Auto, < 3 mins	Methods for leakage test of gas cylinders	Valid
GB/T 12137-2002	199	Add to Cart	3 days	Method for leakage test of gas cylinders	Obsolete
GB/T 12137-1989	199	Add to Cart	2 days	Method for pneumatic testing of cylinders	Obsolete

Basic data

Standard ID: GB/T 12137-2025 (GB/T12137-2025)
Description (Translated English): Methods for leakage test of gas cylinders
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 12137-2015

GB/T 12137-2015: Methods for leakage test of gas cylinders

---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.
Methods for leakage test of gas cylinders ICS 23.020.30 J74 National Standards of People's Republic of China Replace GB/T 12137-2002 Test method for airtightness of cylinders 2015-12-10 released 2016-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 12137-2002 "Test method for airtightness of cylinders". This standard compared with GB/T 12137-2002, the main The amendments are as follows. - Added "normative reference documents" (see Chapter 2); - modified the design, manufacture, installation and use of pressure vessels and inflatable pipelines (see 4.1.4, 4.6,.2002) 3.1.4, 3.1.6); - the addition of the protective device shall comply with the relevant requirements (see 4.4); --- increased the requirements of the test cylinder (see Chapter 5); --- Added test medium and method selection (see 6.1); - increased work after the end of the trial (see 6.5); --- Increased test record requirements (see Chapter 7). This standard is proposed by the National Standardization Technical Committee for Gas cylinders (SAC/TC31). The drafting of this standard. Shanghai Special Equipment Supervision and Inspection Technology Research Institute, Ningbo Mingxin Chemical Machinery Co., Ltd., Shanghai Iron Anchor pressure vessel (group) limited company. The main drafters of this standard. Yin Airong, Ye Qing, Chen Weiming. This standard replaced the previous version of the standard release. GB/T 12137-1989, GB/T 12137-2002. Test method for airtightness of cylinders

1 Scope

This standard specifies the requirements for test equipment and test methods for airtightness testing of cylinders. This standard applies to the use of immersion method or coating method when the gas cylinder air tightness test.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, the only dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 13005 Cylinder Terms GB/T 16163 bottled gas classification TSGR0004 fixed pressure vessel safety technical supervision procedures TSGR0006 Gas cylinders safety technical supervision procedures

3 terms and definitions

GB/T 13005 Definitions and the following terms and definitions apply to this document. 3.1 Immersion method water-immersiontest A test cylinder filled with a predetermined pressure gas was immersed in a water tank to check the airtightness test method. Note. The immersion method is applicable to the air tightness test of the whole or local part of the tested cylinder. 3.2 Coating method soapbubbletest And a test solution is applied to the part to be inspected of the test cylinder with the specified pressure gas to check the airtightness test method. Note. The coating method is suitable for the screw connection between the cylinder and the valve valve, the valve stem, the valve outlet, the fusible plug or the gasket welded joint test.

4 test device

4.1 inflator 4.1.1 The air supply pressure shall be greater than 1.1 times the test airtight test pressure. 4.1.2 test medium should be used dry, clean air, nitrogen or other gas with the test gas is compatible with the nature of the human body non-toxic, Non-corrosive and non-combustible gases (except gas cylinders). For test cylinders containing oxygen or oxidizing gases, the test medium should be strictly free of oil. 4.1.3 Gas cylinder air tightness test pressure shall comply with the product standard of the corresponding cylinder and the provisions of TSGR0006. 4.1.4 gas tank should be installed in the inflatable system, the gas tank should be installed safety valve, gas tank design, manufacture, installation, transformation, use should be consistent TSGR0004. 4.1.5 Reliable degreasing and dewatering devices shall be provided in the inflatable system to ensure that the test media complies with the requirements of 4.1.2. 4.1.6 The pressure piping of the inflatable system shall be qualified by hydrostatic test. The pressure of the hydrostatic test shall not be less than that of the tested gas cylinder. 1.5 times the holding time of not less than 3min. Inflatable pipe design, manufacture, installation, use, etc. with reference to the relevant provisions of TSGD0001. 4.1.7 Gas compressors, gas cylinders and other gas booster equipment and inflatable pipe outlet should be installed pressure gauge. Gas compressor, gas tank And other gas pressurized equipment pressure gauge accuracy of not less than 2.5, inflatable system and the test cylinder connected to the pipeline should be set to check the pressure gauge and work The role of pressure gauge, the day before the formal work need to use the check with the pressure gauge on the working pressure gauge for verification. The accuracy of the pressure gauge is not less than 1.6, the range for the cylinder test pressure of 1.5 times to 3.0 times. The calibration period for the calibration pressure gauge is six months. 4.2 Test tank The test tank used for the immersion test of the immersion method shall comply with the following requirements. A) the depth of the tank should be able to make all the gas cylinders into the water, and the highest point from the surface of not less than 5cm; B) The inner wall of the tank should be white and the water in the tank should be kept clean and transparent. When the brightness in the tank is insufficient, the lighting should be provided at the bottom of the tank. 4.3 Test solution 4.3.1 test liquid for liquid coating method of air tightness test. 4.3.2 Test solution shall not cause harmful effects on the test cylinder, for the oxygen or oxidizing gas containing the test cylinder, the application of grease-free Of the test solution. 4.3.3 Check the liquid should be selected surface tension of the liquid, the test solution should be able to detect small leaks of bubbles. 4.4 Safety requirements 4.4.1 Air tightness test equipment should have a reliable safety protection facilities, and through the unit technical person in charge or safety production person to confirm and Approval. 4.4.2 air tightness test should be responsible for the person, the test process, without the unit technical person in charge or safety production approval, and test no The person concerned shall not enter the test site. 4.4.3 Air tightness test During the packing process, do not press the fastening of the threaded connector or the external force to the compression element. 4.4.4 Regular safety checks on pressure piping shall not be less than once per year.

5 test cylinder requirements

5.1 Test gas tightness test before the test should be carried out before the pressure test, withstand the pressure test before the air tightness test. 5.2 Cylinders containing combustible gases The periodic volume of combustible gases in cylinders should be less than 0.4% (with filling gas as test Except for media), meet the requirements before the air tightness test. 5.3 The surface of the test cylinder shall not have oil or other debris.

6 test methods and determine the basis

6.1 Test medium and method selection 6.1.1 Gas cylinder manufacturing unit air tightness test medium should meet the requirements of 4.1.2, the preferred use of immersion method for air tightness test. 6.1.2 Cylinder periodic inspection unit air tightness test medium and method selection. A) dress according to GB/T 16163 classified as non-flammable, non-toxic, non-corrosive gas cylinders can be directly selected gas cylinders, The air tightness test was carried out by a water immersion method or a coating method. B) Cylinders containing other gases shall be tested in accordance with the requirements of 4.1.2 and shall be tested by air immersion. 6.2 Test conditions 6.2.1 Airtightness of cylinders The ambient temperature is greater than 0 ° C. 6.2.2 According to the test requirements of different cylinders, the test cylinder is charged to the air tightness test pressure. 6.3 Test requirements 6.3.1 Water immersion method The flooding test requirements are as follows. A) Put the test cylinder filled with the test pressure gas into the test tank so that any part of the test cylinder is not less than 5 cm from the surface; B) the test cylinder water immersion time of not less than 1min, to be tested in the tank after the stability of the tank, the visual inspection of the presence of various parts bubble. 6.3.2 Coating method The test solution shall be coated on the part to be tested of the test cylinder filled with the test pressure gas, and the coating liquid retention time shall be not less than 1min. Visual inspection Coating parts with or without bubbles to escape. 6.4 Determination basis Test results are one of the following circumstances, then determine the air tightness test of the test cylinder is unqualified. A) continuous bubbles; B) Bubbles appear when the bubble is wiped with a fixed position. 6.5 work after the end of the test 6.5.1 After the end of the test, should be slowly deflated, the bottle can be retained in the appropriate residual pressure. 6.5.2 The outer surface of the cylinder should be wiped clean and must not leave water and dirt. 6.5.3 Cylinders for unqualified tests shall be clearly marked and segregated at the leak.

7 test record requirements

Cylinder airtight test should do a good job of test records, the record includes at least. test cylinder bottle number, valve type, test date, test environment Temperature, test medium, test pressure, holding time, test cylinder abnormalities, the pilot signed and so on. references [1] TSGD0001 pressure pipeline safety technical supervision procedures industrial pipeline 5102- T / ......

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