1、Designation: F2145 09F2145 13 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; the numb
2、er 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. Scope*
3、1.1 This specification describes requirements and test methods for the qualification of Polyamide 11 (PA 11) and bodiedmechanical fittings for use with outside diameter controlled Polyamide 11 (PA 11), nominal 2 pipe size (IPS), and smallercomplying with Specification D2513.Additionally, the require
4、ments and test methods for the qualification of Polyamide 12 (PA12)bodied mechanical fittings for use with outside diameter controlled Polyamide 11 (PA11) and (PA11) nominal 2 in pipe size (IPS)and smaller complying with Specification D2513 and outside diameter controlled Polyamide 12 (PA12) pipe, n
5、ominal 2 in pipesize (IPS),(IPS) and smaller complying with Specification D2513F2785. In addition, it specifies general requirements of thematerial from which these fittings are made.1.2 The test methods described in this specification are not intended to be used as routine quality tests.1.3 This sp
6、ecification covers the types of mechanical fittings covered in 3.2.1.1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for informationonly.mathematical conversions to SI units that are provided for information only and are not considere
7、d standard.1.5 The following safety hazards caveat pertains only to the test methods portion, Section 7, of this specification. This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appr
8、opriate safety and health practices and determine the applicability of regulatory requirements prior touse.1.6 The text of this specification references notes and footnotes, which provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be considered a
9、s requirements of this specification.2. Referenced Documents2.1 ASTM Standards:2NOTE 1For over 40 years D2513 was the singular US CFR Title 49 Part 192 referenced Standard Specification codifying the installation and use ofthermoplastic gas piping in jurisdictional installations. Initially all mater
10、ials (PE, PVC,ABS, CAB) were contained within the body of the standard D2513.In later years D2513 was completely reformatted to make it more user friendly by moving material-specific requirements from the standards body tomandatory annexes. The next major change occurred late in 2009 at which time a
11、ll thermoplastic materials, except polyethylene, were removed fromD2513 changing its Title and Scope from a thermoplastic gas piping standard to a polyethylene-only gas piping standard. This recent change requiredthat new standards be developed for those materials that were removed from D2513 includ
12、ing PA11. This causes problems for PA11 piping because ithas been referenced and permitted for jurisdictional use and installation under US CFR Title 49 Part 192 as complying with D2513 and D2513 no longerhas the A5 polyamide annex and Part 192 still references D2513-99 which makes for potential con
13、fusion. This puts PA11 gas piping standards intosomewhat of a limbo since D2513 is now a PE-only specification is referenced in all of these standards. Therefore until Part 192 is revised to referencethe new PA11 specification, F2945, PA11 has to fall back to citing the US Code referenced 1999 editi
14、on of D2513 in related standard such as this one.Until CFR Title 49 Part 192 references the newly developed thermoplastic gas piping standards for those materials removed from D2513, there will bedual references, both D251399 and F2945 for PA11, as seen in this standard. At which time Part 192 refer
15、ences F2945, the PA11 gas piping standard,all references to D2513 and this note will be removed from these standards.D638 Test Method for Tensile Properties of PlasticsD1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal PressureD1600 Terminology for Abbreviated Terms Relati
16、ng to Plastics1 This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.Current edition approved April 1, 2009May 1, 2013. Published April 2009May 2013. Originally approved in 2001. Last previous edit
17、ion approved in 20072009 asF214501(2007).F214509. DOI: 10.1520/F2145-09.10.1520/F2145-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summa
18、ry page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends
19、that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, Wes
20、t Conshohocken, PA 19428-2959. United States1D2513 Specification for Thermoplastic Gas Pressure Pipe, Tubing, and FittingsD2837 Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis forThermoplastic Pipe ProductsF412 Terminology Relating to Plas
21、tic 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, Tubing, and Fittings2.2 ASME Standard:ASME B31.8 Gas Transmission and Distribution Pipin
22、g Systems32.3 Federal Standard:CFR, Title 49, Part 192 Pipeline Safety RegulationsTransportation of Natural and Other Gas By Pipeline: Minimum FederalSafety Standards42.4 Plastic Pipe Institute Standard:PPI TR-4 PPI Listing of Hydrostatic Design Bases (HDB), Pressure Design Bases (PDB), and Minimum
23、Required Strength(MRS) Ratings for Thermoplastic Piping Materials or Pipe53. Terminology3.1 Definitions:3.1.1 Definitions of the terms used in this specification are in accordance with Terminology F412 unless otherwise specified.Abbreviations are in accordance with Terminology D1600 unless otherwise
24、 specified.3.1.2 The Gas Industry Terminology is in accordance with ASME B31.8 or CFR, Title 49, Part 192 unless otherwise specified.3.1.3 The term “pipe” refers to both “pipe” and “tubing”. The term “fitting” refers to a mechanical connecting device asdescribed in 3.1.5 and 3.1.7.3.1.4 joint, nthe
25、location at which two pieces of pipe and a fitting are connected together. For example, an installed couplinghas two joints.3.1.5 joint, mechanical, na connection between piping components and employing physical force to develop a seal or producealignment.3.1.6 long-term-strength (LTS), nthe estimat
26、ed tensile stress that when applied continuously will cause failure at100 000 h. This is the intercept of the stress regression line with the 100 000 h coordinate.3.1.7 mechanical fitting, nfitting for making a mechanical joint to provide for pressure integrity, leak tightness, and resistanceto end
27、loads.3.1.7.1 category 1 mechanical fitting, n fitting for assembling pipes, which includes a compression zone to provide forpressure integrity, leak tightness, and resistance to end loads sufficient to cause no less than 25 % elongation of the PA 11 or PA 12piping as described in this specification
28、.3.1.8 MAOP, nThe MaximumAllowable Operating Pressure of the fuel gas piping system in psig as determined in accordancewith CFR, Title 49, Part 192 and as represented in the following:MAOP5P 523S/DR21!3fD (1)where:S = the PA 11 or PA 12 materials HDB as published in PPI TR-4,DR = the pipes dimension
29、 ratio determined by dividing the pipes specified nominal outside diameter by the pipes specifiedwall thickness; and,fD = the design factor for thermoplastic fuel gas piping as set by the authority having jurisdiction. In the United States, thedesign factor is cited in CFR, Title 49, Part 192.121.3.
30、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 a mechanical joint where the bore axis of compression and sealing zonesof the fitting is essentially the same as the connected pipe, for example, couplings, ell
31、s, and tees.3.2.3 mechanical saddle fitting, nmechanical fitting used to make a mechanical joint that allows a lateral connection to anexiting main in which a portion of the fitting is contoured to match the O.D. of the pipe to which it is attached. Herein referredto as the saddle fitting mating pip
32、e or main pipe size.3 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.4 Available from Superintendent of Documents, U.S. Government Printing Office, Washington D.C. 20402.20402.Available fro
33、m Standardization Documents Order Desk,DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.5 Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825, Irving, TX 75062, http:/www.plasticpipe.org.F2145 1324. Materials and Manufacture R
34、equirements4.1 Polyamide 11 (PA 11) and Polyamide 12 (PA12) pressure containing materials subject to continuous stress, either hoop oraxial, shall meet the requirements of Specification D2513,99,AnnexA5, Specification F2945 for Polyamide 11 and SpecificationF2785 for PA12, have an ASTM material spec
35、ification, and the materials long-term strength, such as the long-term hydrostaticstrength, determined in accordance with Test Method D2837, excepting that failure data can be obtained from specimens such asthe following: tensile bars, plane strain, or actual fitting samples.4.2 The physical propert
36、ies of the PA 11 and PA 12 material used to produce the fitting shall be available from the fittingmanufacturer upon request.4.3 Specifications outlining all the physical properties and effects of environmental conditions for the PA11 and PA12 materialused to produce the fitting shall be available f
37、rom the fitting manufacturer upon request.NOTE 2Materials in long term contact with natural gas of line quality and LP gas vapor should be demonstrated not to adversely affect theperformance of the fitting.NOTE 3Materials should have demonstrated resistance to environmental stress cracking when expo
38、sed, under stress to chemical compoundsencountered in, or external gas piping systems, and a demonstrated resistance to bacteriological decomposition. Such compounds include ice thawingchemicals, fertilizers, insecticides, herbicides, leak detection fluids, acids, bases, and, antifreeze solutions us
39、ed to thaw frozen lines. The effects of liquidenvironments such as antifreeze agents, odorants, and hydrocarbons are known to be deleterious to some plastics, particularly under service conditions.5. Dimensions5.1 The dimensions and tolerance shall be determined by the manufacturer.6. Qualification
40、Requirements6.1 GeneralUnless otherwise specified, each nominal size of fitting shall be tested. Testing of the thickest wall pipe that thefitting is designed to be used with qualifies it with use of lesser wall thickness.6.1.1 Mechanical joint qualifications shall be performed on assembled joints u
41、sing the fitting manufacturers joining procedure.All mechanical fitting offered by the manufacturer shall be capable of meeting the requirements of this standard when connectingPolyamide 11 or Polyamide 12 gas piping complying with Specification D251399 and Specification F2945. To verify thestructur
42、al integrity of the fitting body, representative samples shall be subjected to the requirements of 6.2.1. It is not the intentof the specification to require testing of all fitting configurations, that is, tees, ells, etc., but each mechanical joint design in eachsize.6.1.2 All mechanical fitting de
43、scribed in 3.2.1 shall have an internal pipe reinforcing tubular insert stiffener that extends at leastunder the seal and gripping device, where used.The saddle portion of saddle-type fittings do not require an internal tubular stiffenerdue to the nature of the connection.6.2 Performance Requirement
44、s:6.2.1 Elevated Temperature Sustained PressureThe fitting joint or pipe in the area affected by the fitting shall not fail asdefined in Test Method D1598, when tested in accordance with 7.2. The fitting or joint meets this requirement when tested inaccordance with any one of the two conditions (A o
45、r B) listed in 7.2.6.2.2 Tensile StrengthThe pipe joint shall accommodate the tensile loading when tested in accordance with 7.3.6.2.2.1 In-Line Fitting, Category 1The joint shall provide resistance to a force on the pipe equal to or greater than that whichwill cause no less than 25 % elongation of
46、pipe, or the pipe fails outside the joint area when tested in accordance with 7.3.6.2.2.2 Mechanical Saddle FittingsThe joint between the saddle and mating pipe shall not fail by rotation or leakage whentested in accordance with 7.6.6.2.2.3 Joint restrain capabilities less than as defined above shal
47、l constitute failure of the test.6.2.3 Temperature Cycling TestThe mechanical joint shall provide a pressure seal after 10 cycles of the temperature cyclingtest when tested in accordance with 7.4.6.2.4 Constant Tensile Load Joint Test The joint shall not fail leakage or pullout when loaded to an axi
48、al tensile stress of 1320psi (9.1 Mpa) and tested in accordance with 7.5.7. Test Methods7.1 GeneralThe test methods of the specification covers the mechanical joint designs. Test methods that are applicable fromother specifications will be referenced in the section pertaining to that particular test
49、.7.1.1 ConditioningCondition the specimen prior to joining at 73.4 6 3.6F for not less than 16 h.7.1.2 Test ConditionsConduct the tests at the standard lab temperature of 73.4 6 3.6F.7.1.3 Test SpecimensSpecimens: Tests joints shall be prepared with the appropriate size PA11 and PA12 pipe, complying withthe dimensional requirements of Specification D2513, in accordance with the manufacturers joining procedure.7.1.3.1 Tests joints shall be prepared with the appropriate size PA 11 pipe, complying with the dimensional requirements ofSpecification
