1、Designation: G 188 05Standard Specification forLeak Detector Solutions Intended for Use on Brasses andOther Copper Alloys1This standard is issued under the fixed designation G 188; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, th
2、e year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis specification is intended for purchasing agents to use in purchase orders for leak detectionfluids (LD
3、F). The primary purpose of the specification is to assign the responsibility for passingSpecification G 186 to the manufacturers of these products. Previously the only corrosion relatedspecification for LDFs was an obsolete Military Specification that required that the LDF not exceeda corrosion rate
4、 of 100 mpy in a total immersion test. The problem of stress corrosion cracking of brasshas shown up as a major cause of failures in compressed gas service of brass components resultingfrom ammonia used to adjust the pH of LDFs. This specification will give the industrial gas industrya means to prev
5、ent these failures in the future.1. Scope1.1 This specification covers the requirements for leakdetector solutions suitable for use in checking the leakage ofvalves, pipes, fittings, joints, and so forth of a pressurized gassystem fabricated from brasses and other copper alloys.1.2 This specificatio
6、n deals with the stress corrosion crack-ing aspect of leak detector solutions. The effectiveness, chemi-cal, physical and mechanical properties of leak detector solu-tions are not within the scope of this specification.1.3 This standard does not purport to address all of thesafety concerns, if any,
7、associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and to determine theapplicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2G15 Standard Terminology Relating to Corrosion and C
8、or-rosion Testing.E 300 Standard Practice for Sampling Industrial ChemicalsG 186 Standard Test Method for Evaluating Gas-Leak De-tector Solutions Whether They Can Cause Stress Corro-sion Cracking of Brass Alloys.3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 Gas Leak Detector
9、 SolutionsAlso known as leakdetection fluids, leak detector solutions, bubble solutions, andsoap solutions, designated in this standard as LDFs, are fluidsused to detect leaks in pressurized gas systems by the forma-tion of bubbles at the leak site.3.2 Other Definitions:For other definitions used in
10、 this specification, refer to Termi-nology G154. Performance Requirements4.1 The leak detector solution shall not show stress corro-sion cracking of copper alloy specimens as shown in TestMethod G 186.4.2 Additional requirements are not part of this specificationbut may be negotiated by mutual agree
11、ment between theparties concerned.5. Sampling5.1 The manufacturer of the LDF shall be responsible fordeveloping and carrying out a plan for sampling its products inaccordance with Practice E 300.6. Significance and Use6.1 Leak detector solutions may cause stress corrosioncracking of different alloys
12、 If a leak detector solution is foundto cause stress corrosion cracking in accordance with TestMethod G 186, it should not be used on brasses or other copper1This specification is under the jurisdiction of ASTM Committee G01 onCorrosion of Metals and is the direct responsibility of Subcommittee G01
13、06 onEnvironmentally Assisted CrackingCurrent edition approved Oct. 1, 2005. Published October 2005.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards D
14、ocument Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.alloys. If a leak detector solution is found not to cause stresscorrosion cracking in accordance with Test Method G 186,itmay cause stress corros
15、ion cracking of copper or other alloysunder unspecified conditions.7. Certification7.1 Certification of products conforming to this specifica-tion is mandatory.8. Product Marking8.1 Products conforming to this specification shall have astatement that the LDF meets the requirements of this specifi-ca
16、tion on the product label.9. Quality Assurance9.1 The LDF manufacturer shall be responsible for devel-oping and implementing a quality assurance plan that willprovide assurance that its products intended for use on systemscontaining copper alloys, including brass and bronze, pass TestMethod G 186. A
17、s a minimum it is suggested that, for LDFsproduced in batch processes, each batch shall be sampled asdescribed in Section 5 and tested in accordance with TestMethod G 186. After five consecutive batches have passed theG 186 test, the sampling and testing may be omitted for nolonger than six months.9
18、2 If any batch fails the G 186 test, the batch must either berejected or diverted to applications on systems that do notcontain copper alloy components. Subsequently, adequatewarnings must be placed on the labels that the product is notsuitable for use on copper alloys.9.3 If a batch of product fai
19、ls a test, subsequent batches shallhave testing continued until at least five consecutive batchespass.10. Keywords10.1 brass alloys; bubble solutions; copper alloys; gas-leak-detector solutions; leak detector solutions; soap solutions;stress corrosion crackingASTM International takes no position res
20、pecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This
21、standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Intern
22、ational Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown be
23、low.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).G188052
