1、Designation: F2145 13 (Reapproved 2018) An American National StandardStandard Specification forPolyamide 11 (PA 11) and Polyamide 12 (PA12) MechanicalFittings for Use on Outside Diameter Controlled Polyamide11 and Polyamide 12 Pipe and Tubing1This standard is issued under the fixed designation F2145
2、; 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
3、.1. Scope*1.1 This specification describes requirements and test meth-ods for the qualification of Polyamide 11 (PA 11) bodiedmechanical fittings for use with outside diameter controlledPolyamide 11 (PA 11), nominal 2 pipe size (IPS), and smallercomplying with Specification D2513.Additionally, the r
4、equire-ments and test methods for the qualification of Polyamide 12(PA12) bodied mechanical fittings for use with outside diam-eter controlled Polyamide 11 (PA11) nominal 2 in pipe size(IPS) and smaller complying with Specification D2513 andoutside diameter controlled Polyamide 12 (PA12) nominal 2 i
5、npipe size (IPS) and smaller complying with SpecificationF2785. In addition, it specifies general requirements of thematerial from which these fittings are made.1.2 The test methods described in this specification are notintended to be used as routine quality tests.1.3 This specification covers the
6、types of mechanical fittingscovered in 3.2.1.1.4 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.1.5 The following safety hazards caveat
7、pertains only to thetest methods portion, Section 7, of this specification. Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety, health, andenvironmental practices an
8、d determine the applicability ofregulatory limitations prior to use.1.6 The text of this specification references notes andfootnotes, which provide explanatory material.These notes andfootnotes (excluding those in tables and figures) shall not beconsidered as requirements of this specification.1.7 T
9、his international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trad
10、e (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2NOTE 1For over 40 years D2513 was the singular US CFR Title 49Part 192 referenced Standard Specification codifying the installation anduse of thermoplastic gas piping in jurisdictional installations. Initially allmaterials (PE, PVC, ABS, C
11、AB) were contained within the body of thestandard D2513. In later years D2513 was completely reformatted to makeit more user friendly by moving material-specific requirements from thestandards body to mandatory annexes. The next major change occurredlate in 2009 at which time all thermoplastic mater
12、ials, exceptpolyethylene, were removed from D2513 changing its Title and Scopefrom a thermoplastic gas piping standard to a polyethylene-only gaspiping standard. This recent change required that new standards bedeveloped for those materials that were removed from D2513 includingPA11. This causes pro
13、blems for PA11 piping because it has beenreferenced and permitted for jurisdictional use and installation under USCFR Title 49 Part 192 as complying with D2513 and D2513 no longer hasthe A5 polyamide annex and Part 192 still references D2513-99 whichmakes for potential confusion. This puts PA11 gas
14、piping standards intosomewhat of a limbo since D2513 is now a PE-only specification isreferenced in all of these standards. Therefore until Part 192 is revised toreference the new PA11 specification, F2945, PA11 has to fall back tociting the US Code referenced 1999 edition of D2513 in related standa
15、rdsuch as this one. Until CFR Title 49 Part 192 references the newlydeveloped thermoplastic gas piping standards for those materials removedfrom D2513, there will be dual references, both D251399 and F2945 forPA11, as seen in this standard. At which time Part 192 references F2945,the PA11 gas piping
16、 standard, all references to D2513 and this note willbe removed from these standards.D638 Test Method for Tensile Properties of PlasticsD1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1600 Terminology forAbbreviated Terms Relating to Plas-tics1This specification
17、 is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.Current edition approved Feb. 1, 2018. Published March 2018. Originallyapproved in 2001. Last previous edition approved in 2013 as F214513. DOI:10.1520/F2145-13R18
18、.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.*A Summary of Changes section appears at the end of this sta
19、ndardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of
20、International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1D2513 Specification for Thermoplastic Gas Pressure Pipe,Tubing, and FittingsD2837 Test Method for Obtaining Hydrostatic Design Basisfor Thermoplastic Pipe Materials
21、 or Pressure Design Basisfor Thermoplastic Pipe ProductsF412 Terminology Relating to Plastic Piping SystemsF1588 Test Method for Constant Tensile Load Joint Test(CTLJT)F2785 Specification for Polyamide 12 Gas Pressure Pipe,Tubing, and FittingsF2945 Specification for Polyamide 11 Gas Pressure Pipe,Tu
22、bing, and Fittings2.2 ASME Standard:ASME B31.8 Gas Transmission and Distribution PipingSystems32.3 Federal Standard:CFR, Title 49, Part 192 Transportation of Natural and OtherGas By Pipeline: Minimum Federal Safety Standards42.4 Plastic Pipe Institute Standard:PPI TR-4 PPI Listing of Hydrostatic Des
23、ign Bases (HDB),Pressure Design Bases (PDB), and Minimum RequiredStrength (MRS) Ratings for Thermoplastic Piping Mate-rials or Pipe53. Terminology3.1 Definitions:3.1.1 Definitions of the terms used in this specification arein accordance with Terminology F412 unless otherwise speci-fied.Abbreviations
24、 are in accordance with Terminology D1600unless otherwise specified.3.1.2 The Gas Industry Terminology is in accordance withASME B31.8 or CFR, Title 49, Part 192 unless otherwisespecified.3.1.3 The term “pipe” refers to both “pipe” and “tubing”.The term “fitting” refers to a mechanical connecting de
25、vice asdescribed in 3.1.5 and 3.1.7.3.1.4 joint, nthe location at which two pieces of pipe anda fitting are connected together. For example, an installedcoupling has two joints.3.1.5 joint, mechanical, na connection between pipingcomponents and employing physical force to develop a seal orproduce al
26、ignment.3.1.6 long-term-strength (LTS), nthe estimated tensilestress that when applied continuously will cause failure at100 000 h.This is the intercept of the stress regression line withthe 100 000 h coordinate.3.1.7 mechanical fitting, nfitting for making a mechanicaljoint to provide for pressure
27、integrity, leak tightness, andresistance to end loads.3.1.7.1 category 1 mechanical fitting, n fitting for assem-bling pipes, which includes a compression zone to provide forpressure integrity, leak tightness, and resistance to end loadssufficient to cause no less than 25 % elongation of the PA 11 o
28、rPA 12 piping as described in this specification.3.1.8 MAOP, nThe Maximum Allowable Operating Pres-sure of the fuel gas piping system in psig as determined inaccordance with CFR, Title 49, Part 192 and as represented inthe following:MAOP 5 P 5 2 3 S/DR 2 1! 3 fD(1)where:S = the PA11 or PA12 material
29、s HDB as published in PPITR-4,DR = the pipes dimension ratio determined by dividing thepipes specified nominal outside diameter by thepipes specified wall thickness; and,fD= the design factor for thermoplastic fuel gas piping asset by the authority having jurisdiction. In the UnitedStates, the desig
30、n factor is cited in CFR, Title 49, Part192.121.3.2 Definitions of Terms Specific to This Standard:3.2.1 Types of Mechanical Fittings:3.2.2 in-line fitting, nmechanical fitting used to make amechanical joint where the bore axis of compression andsealing zones of the fitting is essentially the same a
31、s theconnected pipe, for example, couplings, ells, and tees.3.2.3 mechanical saddle fitting, nmechanical fitting usedto make a mechanical joint that allows a lateral connection toan exiting main in which a portion of the fitting is contoured tomatch the O.D. of the pipe to which it is attached. Here
32、inreferred to as the saddle fitting mating pipe or main pipe size.4. Materials and Manufacture Requirements4.1 Polyamide 11 (PA 11) and Polyamide 12 (PA12) pres-sure containing materials subject to continuous stress, eitherhoop or axial, shall meet the requirements of SpecificationD251399, Annex A5,
33、 Specification F2945 for Polyamide 11and Specification F2785 for PA12, have an ASTM materialspecification, and the materials long-term strength, such as thelong-term hydrostatic strength, determined in accordance withTest Method D2837, excepting that failure data can be obtainedfrom specimens such a
34、s the following: tensile bars, planestrain, or actual fitting samples.4.2 The physical properties of the PA11 and PA12 materialused to produce the fitting shall be available from the fittingmanufacturer upon request.4.3 Specifications outlining all the physical properties andeffects of environmental
35、 conditions for the PA 11 and PA 12material used to produce the fitting shall be available from thefitting manufacturer upon request.NOTE 2Materials in long term contact with natural gas of line qualityand LP gas vapor should be demonstrated not to adversely affect theperformance of the fitting.NOTE
36、 3Materials should have demonstrated resistance to environ-mental stress cracking when exposed, under stress to chemical compoundsencountered in, or external gas piping systems, and a demonstratedresistance to bacteriological decomposition. Such compounds include ice3Available from American Society
37、of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.4Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil.5Available from Plastics Pipe Institute (PPI), 105
38、 Decker Court, Suite 825,Irving, TX 75062, http:/www.plasticpipe.org.F2145 13 (2018)2thawing chemicals, fertilizers, insecticides, herbicides, leak detectionfluids, acids, bases, and, antifreeze solutions used to thaw frozen lines.Theeffects of liquid environments such as antifreeze agents, odorants
39、, andhydrocarbons are known to be deleterious to some plastics, particularlyunder service conditions.5. Dimensions5.1 The dimensions and tolerance shall be determined bythe manufacturer.6. Qualification Requirements6.1 GeneralUnless otherwise specified, each nominal sizeof fitting shall be tested. T
40、esting of the thickest wall pipe thatthe fitting is designed to be used with qualifies it with use oflesser wall thickness.6.1.1 Mechanical joint qualifications shall be performed onassembled joints using the fitting manufacturers joining proce-dure. All mechanical fitting offered by the manufacture
41、r shallbe capable of meeting the requirements of this standard whenconnecting Polyamide 11 or Polyamide 12 gas piping comply-ing with Specification D251399 and Specification F2945.Toverify the structural integrity of the fitting body, representativesamples shall be subjected to the requirements of 6
42、.2.1.Itisnotthe intent of the specification to require testing of all fittingconfigurations, that is, tees, ells, etc., but each mechanical jointdesign in each size.6.1.2 All mechanical fitting described in 3.2.1 shall have aninternal pipe reinforcing tubular insert stiffener that extends atleast un
43、der the seal and gripping device, where used. Thesaddle portion of saddle-type fittings do not require an internaltubular stiffener due to the nature of the connection.6.2 Performance Requirements:6.2.1 Elevated Temperature Sustained PressureThe fittingjoint or pipe in the area affected by the fitti
44、ng shall not fail asdefined in Test Method D1598, when tested in accordance with7.2. The fitting or joint meets this requirement when tested inaccordance with any one of the two conditions (A or B) listedin 7.2.6.2.2 Tensile StrengthThe pipe joint shall accommodatethe tensile loading when tested in
45、accordance with 7.3.6.2.2.1 In-Line Fitting, Category 1The joint shall provideresistance to a force on the pipe equal to or greater than thatwhich will cause no less than 25 % elongation of pipe, or thepipe fails outside the joint area when tested in accordance with7.3.6.2.2.2 Mechanical Saddle Fitt
46、ingsThe joint between thesaddle and mating pipe shall not fail by rotation or leakagewhen tested in accordance with 7.6.6.2.2.3 Joint restrain capabilities less than as defined aboveshall constitute failure of the test.6.2.3 Temperature Cycling TestThe mechanical joint shallprovide a pressure seal a
47、fter 10 cycles of the temperaturecycling test when tested in accordance with 7.4.6.2.4 Constant Tensile Load Joint Test The joint shall notfail leakage or pullout when loaded to an axial tensile stress of1320 psi (9.1 Mpa) and tested in accordance with 7.5.7. Test Methods7.1 GeneralThe test methods
48、of the specification coversthe mechanical joint designs. Test methods that are applicablefrom other specifications will be referenced in the sectionpertaining to that particular test.7.1.1 ConditioningCondition the specimen prior to join-ing at 73.4 6 3.6 F for not less than 16 h.7.1.2 Test Conditio
49、nsConduct the tests at the standard labtemperature of 73.4 6 3.6 F.7.1.3 Test Specimens:7.1.3.1 Tests joints shall be prepared with the appropriatesize PA 11 pipe, complying with the dimensional requirementsof Specification D2513, in accordance with the manufacturersjoining procedure.7.1.3.2 Test joints shall be prepared with the appropriatesize PA 12 pipe, complying with the dimensional requirementsof Specification F2785, in accordance with the manufacturersjoining procedure.7.2 Elevated Temperature Sustained Pressure Test:7.2.1 The apparatus and
