ASTM_C_668_-_98_2014.pdf

Designation:C66898(Reapproved 2014)Standard Specification forAsbestos-Cement Transmission Pipe1This standard is issued under the fixed designation C668;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 specification covers asbestos-cement transmissionpipe intended for use in transmission systems that carry fluidsunder pressure.A transmission system consists of pipe lineswhich convey fluids from their source to a point of distributionor discharge.The system is characterized by relatively steadyflow and few appurtenances,thereby permitting reasonablehydraulic analysis,including surge analysis.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.NOTE1This specification is issued for product standardization andpurchasing purposes only,and does not include requirements for instal-lation or the relationships between operating conditions and the strengthcharacteristics of the various classifications of pipe.The purchaser iscautioned that he must correlate installation and operating conditions withthe specified characteristics of the pipe.1.3 WarningBreathing of asbestos dust is hazardous.Asbestos and asbestos products present demonstrated healthrisks for users and for those with whom they come into contact.In addition to other precautions,when working with asbestos-cement products,minimize the dust that results.For informa-tion on the safe use of chrysoltile asbestos,refer to“Safe Useof Chrysotile Asbestos:A Manual on Preventive and ControlMeasures.”21.4 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.See for a specifichazard warning.2.Referenced Documents2.1 ASTM Standards:3C150 Specification for Portland CementC458 Test Method for Organic Fiber Content of Asbestos-Cement ProductsC500 Test Methods for Asbestos-Cement PipeC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteD1869 Specification for Rubber Rings for Asbestos-CementPipeD2946 Terminology for Asbestos and AsbestosCementProducts2.2 Federal Standard:Fed.Std.No.123 Marking for Shipment(Civil Agencies)42.3 Military Standard:MIL-STD-129 Marking for Shipment and Storage42.4 Other Standards:Uniform Freight Classification Rules5National Motor Freight Classification Rules63.Terminology3.1 Definitions:3.1.1 couplingfitting made from larger diameter pipe ofthe same type and class,or of Type II and a higher class forjoining asbestos-cement pipe that,when properly installed withthe proper accessories,develops a joint equivalent in strengthand serviceability to the pipe sections.3.1.2 lot,nfor pipe sizes 525 mm(21 in.)in diameter andsmaller,each 300 lengths of pipe or less,of identical class and1This specification is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibility of C17.03 onAsbestos-Cement Sheet Products and Accessories.Current edition approved Dec.1,2014.Published December 2014.Originallyapproved in 1970.Last previous edition approved in 2008 as C668 98(2008).DOI:10.1520/C0668-98R14.2Available from The Asbestos Institute,http:/ 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.4Available from Standardization Documents Order Desk,Bldg.4,Section D,700 Robbins Ave.,Philadelphia,PA 19111-5094 Attn:NPODS.5Available from the Uniform Classification Commission,Room 1106,222 S.Riverside Plaza,Chicago,IL 60606.6Available from National Motor Freight Inc.,1616“P”St.,NW,Washington,DC 20036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 size manufactured on each machine during a 24-h period.Forpipe larger than 525 mm(21 in.),each 300 lengths of pipe orless,of identical class and size manufactured on each machineduring a period of consecutive working days not exceedingseven days.3.1.3 Additional terminology is given in TerminologyD2946.4.Classification4.1 Asbestos-cement pipe furnished under this specificationshall be manufactured in Classifications 21,24,28,31,34,41,58,55,and 62.Note that these numbers correspond to ten timesthe minimum hydrostatic strength,in MPa(30,35,40,45,50,60,70,80,and 90.This classification corresponds to one tenthof the minimum hydrostatic strength,in psi).4.2 The types of pipe shall be known as Type I and Type IIcorr