1、Designation:F173419An American National StandardStandard Practice forQualification of a Combination of Squeeze Tool,Pipe,andSqueeze-Off Procedures to Avoid Long-Term Damage inPolyethylene(PE)Gas Pipe1This standard is issued under the fixed designation F1734;the number immediately following the desig
2、nation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers qualifying a comb
3、ination of asqueeze tool,a polyethylene gas pipe,and a squeeze-offprocedure to avoid long-term damage in polyethylene gas pipe.Qualifying is conducted by examining the inside and outsidesurfaces of pipe specimens at and near the squeeze to deter-mine the existence of features indicative of long-term
4、 damage.If indicative features are absent,sustained pressure testing inaccordance with Specification D2513 is conducted to confirmthe viability of the squeeze-off process.For assistance withspecimen examination,an Adjunct,ADJF17342,is availablefrom ASTM.1.2 This practice is appropriate for any combi
5、nation ofsqueeze tool,PE gas pipe and squeeze-off procedure,and isparticularly appropriate for pre-1975 Polyethylene(PE)pipe,and for pipe sizes of 8 in.or above,because of a greaterpossibility of long-term damage.1.3 This practice is for use by squeeze-tool manufacturers,pipe manufacturers and gas u
6、tilities to qualify squeeze toolsmade in accordance with Specification F1563;and squeeze-offprocedures in accordance with Guide F1041 with pipe manu-factured in accordance with Specification D2513.1.4 Governing codes and project specifications should beconsulted.Nothing in this practice should be co
7、nstrued asrecommending practices or systems at variance with governingcodes and project specifications.1.5 Where applicable in this guide,“pipe”shall mean“pipeand tubing.”1.6 UnitsThe values stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conv
8、ersions to SI units that are provided forinformation only and are not considered standard.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmen
9、tal practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Gu
10、ides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D2513 Specification for Polyethylene(PE)Gas PressurePipe,Tubing,and FittingsD3350 Specification for Polyethylene Plastics Pipe and Fit-tings MaterialsF1
11、041 Guide for Squeeze-Off of Polyolefin Gas PressurePipe and TubingF1563 Specification for Tools to Squeeze-off Polyethylene(PE)Gas Pipe or Tubing2.2 ASTM Adjuncts:Interpretation Aid for Squeeze-Off Damage23.Terminology3.1 Definitions:3.1.1 squeeze-off,na technique used to temporarily con-trol the f
12、low of gas in a polyethylene gas pipe by flattening thepipe with a mechanical or hydraulic device.3.1.2squeeze process,nthe combination of the squeezetool,the pipe being squeezed,and the squeeze-off procedurebeing used.3.1.3 wall compression(WC),nthe percentage extent towhich the pipe walls are comp
13、ressed when the pipe issqueezed.(See Fig.1.)It is defined as:1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.Current edition approved Jan.1,2019.Published February 2019.Originallyapproved in 1996.L
14、ast previous edition approved in 2009 as F1734 03(2009)which was withdrawn April 2018 and reinstated in January 2019.DOI:10.1520/F1734-19.2Available from ASTM International Headquarters.Order Adjunct No.ADJF1734.Original adjunct produced in 1995.3For referenced ASTM standards,visit the ASTM website,
15、www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis interna
16、tional standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 WC,%5S1 2L2tD3100(1)where:L=distance between the squeeze tool bars as shown in Fig.1,andt=uncompressed pipe wall thickness,expressed in thesame units as L.3.1.3.1 DiscussionWhen the distance betwe
