ASTM_F_1025_-_94_2011.pdf

Designation:F102594(Reapproved 2011)Standard Guide forSelection and Use of Full-Encirclement-Type Band Clampsfor Reinforcement or Repair of Punctures or Holes inPolyethylene Gas Pressure Pipe1This standard is issued under the fixed designation F1025;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 specifically addresses the design and instal-lation of full-encirclement-type band clamps for repair ofgouges,punctures,or holes,and for reinforcement of polyeth-ylene plastic pipe.Guidelines are provided for selecting andusing clamps in pipe sizes 2 in.nominal(60 mm)and larger.1.1.1 A test method is also provided for the user to assessthe applicability of the repair clamp.Under appropriatecircumstances,this type of clamp offers a convenient,effective,and safe means of restoring the integrity of an in-servicepipeline,without cutting out a section of pipe(see Note 1).Thepipe to be repaired cannot be backed by a stiffener for internalsupport and cross-sectional dimensional control.Satisfactoryuse of this type of clamp must rely on the crush resistance ofthe pipe itself and a fitting design concept,which retains thecross-sectional pipe configuration while minimizing compres-sive forces required to obtain an effective leakage seal.NOTE1The appropriateness for use of this type of clamp should bedetermined by using the information contained in this guide and fromconsultation with,and recommendations of,both the pipe and clampmanufacturers.The basic premise for use of this type of clamp is that it isrecommended by the manufacturer for this specific application and thatstep-by-step installation instructions are available for that application.It isimportant in the development of this type of clamp that prototype testingbe conducted to evaluate performance expectations because of thephysical limitations encountered when designing it for use with plasticpipe.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2F1041 Guide for Squeeze-Off of Polyolefin Gas PressurePipe and Tubing3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 creepthe time-dependent part of strain resultingfrom stress,that is,dimensional change caused by the appli-cation of load over and above the elastic deformation and withrespect to time.4.Significance and Use4.1 Full-encirclement-type band clamps are recommendedfor repairs only where the pipe is able to maintain its structuralintegrity.These clamps are not recommended for permanentrepair of pipe where the damage could propagate outside theclamp under anticipated field conditions(see 5.1.1 for repairlimitations).In such situations,cut out and replace the dam-aged pipe with a new piece.4.2 These clamps may be used to cover holes left in the pipefrom abandoned service line connections,purge points,andaccidental punctures.4.3 These clamps may be used to reinforce the pipe wherethe wall thickness has been reduced because of gouges or otherirregularities.4.4 Some users reinforce polyethylene pipe after it has beensqueezed-off as a precaution against pipe damage that mayhave occurred during the squeeze-off process and as a means ofensuring that the pipe will not be squeezed-off again at thesame location.Consult with the polyethylene pipe manufac-turer as to the appropriateness of squeeze-off for their product,and for circumstances when reinforcement is recommended.See Guide F1041.1This 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 Aug.1,2011.Published August 2011.Originallyapproved in 1986.Last previous edition approved in 2006 as F1025 94(2006).DOI:10.1520/F1025-94R11.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.General Considerations5.1 The following general considerations apply to determinethe appropriateness of using full-encirclement-type bandclamps:5.1.1 Type or Extent of FailureConsider repairs only to aclean-cut round hole or deep s