ASTM_F_1041_-_02_2008.pdf

Designation:F104102(Reapproved 2008)Standard Guide forSqueeze-Off of Polyolefin Gas Pressure Pipe and Tubing1This standard is issued under the fixed designation F1041;the number immediately following the designation 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 guide describes general procedures for squeeze-offof polyolefin gas pressure pipe and tubing.Pipe and squeezetool manufacturers shall be requested to supply recommenda-tions for squeeze-off with materials or products.1.2 Governing codes and project specifications should beconsulted.Nothing in this document should be construed asrecommending practices or systems at variance with governingcodes and project specifications.1.3 This guide covers squeeze-off of polyolefin pipe andtubing in accordance with Specification D2513.1.4 Where applicable in this guide,“pipe”shall mean“pipeand tubing.”1.5 UnitsThe values stated in inch-pound units are to beregarded as the standard.The values given in parentheses aremathematical conversions to SI units,which are provided forinformation only and are not considered the standard.1.6 This standard does not purport to address all of thesafety problems,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D2513 Specification for Polyethylene(PE)Gas PressurePipe,Tubing,and FittingsF1734 Practice for Qualification of a Combination ofSqueeze Tool,Pipe,and Squeeze-Off Procedures to AvoidLong-Term Damage in Polyethylene(PE)Gas Pipe2.2 Other Standards:GRI-92/0147.2 Volume 2:Technical Reference on Squeeze-off of Polyethylene Gas Pipes33.Significance and Use3.1 Squeeze-off is a technique used to control the flow ofgas through a pipe by the compressing action of a mechanicalor hydraulic device.Squeeze-off may be used to reduce theflow of gas to an acceptable rate.3.2 Proper squeeze-off procedures result in significant timesaving in the reduction of gas flow in an emergency and in themaintenance and operation,or both,of a gas distributionsystem.Improper squeeze-off can cause damage to the pipe orcreate a safety hazard,or both.4.Operator Experience4.1 Each squeeze-off shall be made in accordance withwritten procedures in accordance with Practice F1734,thathave been proven to produce safe squeeze-off.The personactually responsible for the squeeze-off shall ensure thatdetailed procedures are developed in conjunction with theowner of the pipe system,the manufacturer of the pipe,and themanufacturer of the squeeze-off tools.These procedures shallinclude safety precautions to be followed and are to be issuedbefore actual squeeze-off operations commence.4.2 Skill and knowledge on the part of the operator arerequired to control the flow of gas to achieve a safe squeeze-off.This skill and knowledge shall be obtained by makingsqueeze-offs in accordance with written procedures in accor-dance with Practice F1734.5.Pipe and Conditions5.1 In order to obtain proper squeeze-off,it is necessary toconsider the pipe diameter,wall thickness,pipe material,internal pressure,squeeze tool(s),squeeze-off procedure andenvironmental conditions.The user shall request the pipemanufacturer to supply specific recommendations for thesqueeze-off of the manufacturers product based upon the1This guide is under the jurisdiction of ASTM Committee F17 on Plastic PipingSystems and is the direct responsibility of Subcommittee F17.60 on Gas.Current edition approved March 1,2008.Published June 2008.Originallyapproved in 1987.Last previous edition approved in 2002 as F 1041 02.DOI:10.1520/F1041-02R08.2For 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 Document Summary page onthe ASTM website.3GRI Document Fulfillment Center,1510 Hubbard Dr.Batavia,IL 60510.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 evaluation procedures outlined in Practice F1734 with addi-tional considerations for internal pressure and ambient tem-perature.The operator shall exercise caution during coldtemperatures because the pipe may be more susceptible tosqueeze off damage.6.Apparatus6.1Tools to squeeze-off polyolefin gas pressure pipe andtubing shall conform to the requirements of F1563.7.Procedure7.1 Proper squeeze-off procedures developed in accordancewith Practice F1734 shall address safety considerations,toollocation,tool operation,tool removal,and post squeeze-offconsiderations.7.2 Safety ConsiderationsPressure control situations re-quiring squeeze-off may involve working in the vicinity ofe