ASTM_F_2261_-_06_2011.pdf

Designation:F226106(Reapproved 2011)Standard Test Method forPressure Rating Poly(Vinyl Chloride)(PVC)Plastic PipeFittings,Schedule 40 and 80 Socket-Type.1This standard is issued under the fixed designation F2261;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 test method covers a procedure for establishingPressure Rating for PVC schedule 40 and 80 socket-typefittings by evaluating fitting failure test data derived by testingwater-filled assemblies of pipe and fittings.1.2 Unless the data approximates a straight line,whencalculated using log-log coordinates,it is not possible to assigna pressure rating to that product or sample of product.Data thatexhibit high scatter,or a downward curve,due to low long termdata,will give low extrapolated values that are more conser-vative when calculated using log-log co-ordinates.In addition,this downward curve will show as higher scatter,and where thelower confidence level limits are not met the data shall beclassified as unsuitable.(See Note 1)NOTE1This test method is similar to that used in Test Method D2837,which has been used for about 30 years to establish the HDS of plasticpipe materials and is the basis for all pressure ratings assigned to plasticpipes.1.3 The products covered by this test method are schedule40 or 80 molded PVC fittings that conform to SpecificationsD2466 or D2467.1.4 The pressure ratings developed using this test methodapplies only to fittings identical to the ones that were tested.Some variables that will affect the pressure rating are pipesize,pattern,mold design,material,and molding conditions.1.5 The values in inch-pound units are to be regarded as thestandard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.6 The testing procedure used to obtain the fitting failuredata shall be as described in those sections of Test MethodD1598,that are referenced in Section 6 of this test method.1.7 The products covered by this test method are intendedfor use in the distribution of pressurized liquids at 73F.Whenappropriate,the design engineer must consider the effects ofelevated temperature and chemical compatibility of the liquidwith the fitting material and apply necessary design factors.1.8 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-tion of regulatory limitations prior to use.NOTE2Pressurized(compressed)air or other compressed gasescontain large amounts of stored energy which present serious safetyhazards should a system fail for any reason.2.Referenced Documents2.1 ASTM Standards:2D1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD2466 Specification for Poly(Vinyl Chloride)(PVC)PlasticPipe Fittings,Schedule 40D2467 Specification for Poly(Vinyl Chloride)(PVC)PlasticPipe Fittings,Schedule 80D2837 Test Method for Obtaining Hydrostatic Design Basisfor Thermoplastic Pipe Materials or Pressure Design Basisfor Thermoplastic Pipe Products2.2Other Standards:PPI Report TR-4 HDB/SDB/PDB/MRS Listed Materials33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 failurethe act,state,or fact of failing,specifically alost of strength or breakdown of function3.1.1.1 Discussionfor testing purposes,failure is thebursting,cracking or weeping of the fitting3.1.2 LTHSpthe estimated internal pressure that whenapplied continuously will cause failure of the fitting at 100 000h.This is the intercept of the pressure regression line with the100 000-h intercept.1This test method is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Oct.1,2011.Published December 2011.Originallyapproved in 2006.Last previous edition approved in 2006 as F226106 DOI:10.1520/F2261-06R11.2For 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.3Available from Plastics Pipe Institute(PPI),105 Decker Court,Suite 825,Irving,TX 75062,http:/www.plasticpipe.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.3 pressure design basis(PDB)one of a series ofestablished pressure values for plastic piping components(multilayer pipe,fitting,valve,etc.)obtaining by categorizingthe LTHSpin accordance with Table 2 of Specification D2837.3.1.4 pressure rating(PR)the estimated maximum