1、Designation:F 781 95An American National StandardStandard Specification forPerfluoro(Alkoxyalkane)Copolymer(PFA)Plastic-LinedFerrous Metal Pipe and Fittings1This standard is issued under the fixed designation F 781;the number immediately following the designation indicates the year oforiginal adopti
2、on or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers factory-made perfluoro(alkoxyalkane)copolymer(PFA)plas
3、tic-lined ferrous metalpipe and fittings,primarily intended for conveying corrosiveliquids and gases.Requirements for materials,workmanship,dimensions,design,construction,working pressures and tem-peratures,test methods,and markings are included.1.2 The values given in parentheses are provided for i
4、nfor-mation purposes only.NOTE1This specification does not include products coated with PFAnor does it define the suitability of PFA-lined components in chemicalenvironments.1.3 The ferrous piping products shall meet the requirementsof the relevant specification listed in 1.3.1 through 1.4.Nominal s
5、izes from 1 through 12 in.in 150 and 300 psi(1.0 to2.0 MPa)ratings are covered.NOTE2The PFA sealing faces may prevent achievement of the fullpressure rating of the ferrous housings.For pressure limitations,themanufacturer should be consulted.1.3.1 For Ferrous Pipe2,3:Title of SpecificationASTMDesign
6、ationPipe,Steel,Black,and Hot-Dipped,Zinc-Coated Welded andSeamlessA 53Seamless Carbon Steel Pipe and High-Temperature ServiceA 106Electric-Resistance-Welded Steel PipeA 135Electric-Welded Low-Carbon Steel Pipe for the Chemical IndustryA 587Seamless and Welded Austenitic Stainless Steel PipeA 3121.3
7、.2 For Ferrous Flanges2,3:Title of SpecificationASTMDesignationForgings,Carbon Steel,for Piping ComponentsA 105Forged or Rolled Steel Pipe Flanges,Forged Fittings and Valvesand Parts for General ServiceA 181Forged or Rolled Alloy-Steel Pipe Flanges,Forged Fittings,andValves and Parts for High-Temper
8、ature ServiceA 182Carbon-Steel Castings Suitable for Fusion Welding for High-Temperature ServiceA 216Ferritic Ductile Iron for Pressure Retaining Castings for Use atElevated TemperaturesA 395Ductile Iron CastingsA 5361.3.3 For Ferrous Fittings2,3:Title of SpecificationASTMDesignationForgings,Carbon
9、Steel,for Piping ComponentsA 105Forged or Rolled Steel Pipe Flanges,Forged Fittings,and Valvesand Parts for General ServiceA 181Carbon Steel Castings Suitable for Fusion Welding for High-Temperature ServiceA 216Piping Fittings Wrought Carbon Steel and Alloy Steel forModerate and Elevated Temperature
10、sA 234Austenitic Steel Castings for High-Temperature ServiceA 351Alloy Steel Castings Specially Heat-Treated for PressureContaining Parts Suitable for High-Temperature ServiceA 389Ferritic Ductile Iron for Pressure Retaining Castings for Use atElevated TemperaturesA 395Ductile Iron CastingsA 536Duct
11、ile Iron for Pressure Containing Castings for Use at ElevatedTemperaturesA 4031.4 The PFA-lined flanged pipe and fitting assemblies arelimited to use from 20 to 500F(29 to 260C).For usebelow 29C(20F)consult the manufacturer.NOTE3The above temperature limitations are based on noncorrosivetest conditi
12、ons.Use in specific aggressive environments may alter theabove temperatures,and these limits shall be established by mutualagreement between the purchaser and manufacturer.2.Referenced Documents2.1 ASTM Standards:D 1600 Terminology for Abbreviated Terms Relating toPlastics4D 3307 Specification for P
13、FA-Fluorocarbon Molding andExtrusion Materials5F 412 Terminology Relating to Plastic Piping Systems62.2ANSI Standard:B 16.5 Steel Pipe Flanges and Flanged Fittings72.3Federal Standard:1This specification is under the jurisdiction ofASTM Committee F-17 on PlasticPiping Systems and is the direct respo
14、nsibility of Subcommittee F17.11 onComposite.Current edition approved Sept.10,1995.Published November 1995.Originallypublished as F 781 82.Last previous edition F 781 93.2Annual Book of ASTM Standards,Vol 01.01.3Annual Book of ASTM Standards,Vol 01.02.4Annual Book of ASTM Standards,Vol 08.01.5Annual
15、 Book of ASTM Standards,Vol 08.03.6Annual Book of ASTM Standards,Vol 08.04.7Available from American National Standards Institute,11 West 42nd St.,13thFloor,New York,NY 10036.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Fed.Std.No.123 M
16、arking for Shipment(Civil Agencies)82.4Military Standard:MIL-STD-129 Marking for Shipment and Storage83.Terminology3.1 The terminology used is in accordance with Terminol-ogy F 412,and abbreviations are in accordance with Terminol-ogy D 1600 unless otherwise specified.3.2 The abbreviation for perfluoro(alkoxyalkane)copoly-mer is PFA.4.Materials4.1 Lining:4.1.1 MaterialThe lining shall be made from PFA resinsconforming to the requirements of Type II materials as definedin Specification D 3307 exc
