1、Designation: F1973 12F1973 13 An American National StandardStandard Specification forFactory Assembled Anodeless Risers and TransitionFittings in Polyethylene (PE) and Polyamide 11 (PA11) andPolyamide 12 (PA12) Fuel Gas Distribution Systems1This standard is issued under the fixed designation F1973;
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.1
3、. Scope*1.1 This specification covers requirements and test methods for the qualification of factory assembled anodeless risers andtransition fittings, for use in polyethylene (PE), in sizes through NPS 8, and Polyamide 11 (PA11) and Polyamide 12 (PA12), insizes through NPS 6, gas distribution syste
4、ms.1.2 The test methods described are not intended to be routine quality control tests.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered stand
5、ard.1.4 Throughout this specification footnotes are provided for informational purposes and shall not be considered as requirementsof 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 Specificatio
6、n codifying the installation and use ofthermoplastic gas piping in jurisdictional installations. Initially all materials (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 r
7、equirements from the standards body tomandatory annexes. The next major change occurred late in 2009 at which time all 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
8、. This recent change requiredthat new standards be developed for those materials that were removed from D2513 including 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 D251
9、3 and D2513 no longerhas the A5 polyamide annex and Part 192 still references D2513-99 which makes for potential confusion. 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 revi
10、sed to referencethe new PA11 specification, F2945, PA11 has to fall back to citing the US Code referenced 1999 edition 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, t
11、here will bedual references, both D251399 and F2945 for PA11, as seen in this standard. At which time Part 192 references F2945, the PA11 gas piping standard,all references to D2513 and this note will be removed from these standards.A53/A53M Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-
12、Coated, Welded and SeamlessA513 Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical TubingD638 Test Method for Tensile Properties of PlasticsD1600 Terminology for Abbreviated Terms Relating to PlasticsD2513 Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fit
13、tingsE515 Practice for Leaks Using Bubble Emission TechniquesF412 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 FittingsF2897 Specification for Tracking and Traceability
14、Encoding System of Natural Gas Distribution Components (Pipe, Tubing,Fittings, Valves, and Appurtenances)F2945 Specification for Polyamide 11 Gas Pressure Pipe, Tubing, and Fittings1 This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct respon
15、sibility of Subcommittee F17.60 on Gas.Current edition approved Nov. 1, 2012May 1, 2013. Published January 2013May 2013. Originally approved in 1999. Last previous edition approved in 20082012 asF197308.12. DOI: 10.1520/F1973-12.10.1520/F1973-13.2 For referencedASTM standards, visit theASTM website,
16、 www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary 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
17、 what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered
18、 the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.2 US Government Document:Federal Standard:3United States Code of Federal RegulationsCFR Title 49
19、 Part 192 Title 49 Part 192Transportation of Natural and Other Gas ByPipeline: Minimum Federal Safety Standards2.3 ANSI Standards:ANSI B 31.8 Gas Transmission and Distribution Piping Systems4ANSI/ASME B1.20.1 Pipe Threads, General Purpose (inch)4ANSI B 16.5 Steel Pipe Flanges, Flanged Fittings42.4 A
20、SME Standard:5ASME Boiler and Pressure Vessel Code2.5 API Standard:6API 1104 Standard for Welding Pipelines and Related Facilities2.6 UL Standard:7UL 360 Flexible Metal Hose2.7 PPI Standard:8PPI TR-4 PPI Listing of Hydrostatic Design Bases (HDB), Pressure Design Bases (PDB) and Minimum Required Stre
21、ngth(MRS) Ratings for Thermoplastic Piping Materials or Pipe3. Terminology3.1 The gas industry terminology used in this specification is in accordance withANSI B31.8 or the United States CFR 49 Part192, unless otherwise indicated.3.1.1 The term “pipe” used herein refers to both “pipe” and “tubing” u
22、nless specifically stated otherwise.3.1.2 The term “gas” used herein refers to any fuel gas unless specifically stated otherwise.3.2 DefinitionsDefinitions are in accordance with Definitions F412 unless otherwise specified. Abbreviations are inaccordance with Abbreviations D1600 unless otherwise spe
23、cified.3.3 Definitions:3.3.1 anodeless flex riser casinga flexible, plastic coated, metallic, non-gas carrying, protective outer sleeve portion of ananodeless riser which is sometimes selected as an alternate to rigid riser casings.3.3.2 anodeless risera type of transition fitting which is designed
24、to transport gas from an underground polyethylene orpolyamide 11 or polyamide 12 service line to above-ground steel piping. In an anodeless riser, the polyethylene or polyamide 11or polyamide 12 pipe is always the gas carrier, at least, in the below ground section.3.3.3 anodeless riser, flex designa
25、n anodeless riser where the rise leg is a transition fitting which is fabricated to an anodelessflex riser casing which is field bent to form the base leg.3.3.3.1 DiscussionAnodeless flex risers usually require a riser bracket attached to a rigid supporting member to avoid meter set loads from being
26、transmitted to the thermoplastic service line.3.3.4 anodeless riser nipplethe metallic, aboveground, gas carrying pipe or fitting portion of an anodeless riser.3.3.5 anodeless riser rigid riser casingthe metallic, non-gas carrying protective outer sleeve portion of an anodeless riser.3.3.6 anodeless
27、 riser, rigid, straight and prebentan anodeless riser which is produced straight or factory prebent, usually 90,thus defining rise leg and base leg dimensions.3.3.7 base legthe steel horizontal portion of an anodeless riser measured from the centerline of vertical.3.3.8 Category 1a transition joint
28、which provides for pressure tightness and resistance to end loads sufficient to cause no lessthan 25 % elongation of the PE, PA11 or PA12 piping as described in this standard.3.3.9 Category 3a transition joint which provides for pressure tightness and resistance to end loads greater than the maximum
29、thermal stress that would be produced by a temperature change of 100F (55C).3 Available from Superintendent of Documents, US Government Printing Office, Washington, DC 20402.Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.d
30、aps.dla.mil.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.5 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org
31、.6 Available from American Petroleum Institute (API), 1220 L. St., NW, Washington, DC 20005-4070, http:/www.api.org.7 Available from Underwriters Laboratories (UL), 333 Pfingsten Rd., Northbrook, IL 60062-2096, http:/.8 Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825, Irvin
32、g, TX 75062, http:/www.plasticpipe.org.F1973 1323.3.10 grade level markinga marking, tape or label applied to the riser to identify the point at which the transition from PE,PA11 or PA12 gas carrier to metallic gas carrier occurs. This marking assists the installer in determining the grade level of
33、theinstallation.3.3.11 insert stiffenera rigid, non-split, solid wall tube which is inserted into PE, PA11 or PA12 piping to support compressionloads in the area of the transition joint.3.3.12 jointthe location at which two or more pieces of pipe or a pipe and a fitting are connected.3.3.13 MAOPthe
34、maximum allowable operating pressure of the fuel gas piping system, in psig, as determined in accordancewith US DOT CFR, Title 49, Part 192.121 and as represented in the following:MAOP5P 523S/R 21!3fD (1)where:S = The Thermoplastic materials HDB as published in the Plastics Pipe Institute PPI TR 4 p
35、ublication,R = The pipes dimension ratio determined by dividing the pipes specified nominal outside diameter by the pipes specifiednominal wall thickness, andfD = the design (derating) factor for thermoplastic fuel gas piping as set by the authority having jurisdiction. In the United Statesthe desig
36、n factor is cited in CFR Title 49 Part 192.121.3.3.14 rise legthe vertical portion of an anodeless riser measured from the centerline of horizontal.3.3.15 service linea fuel gas distribution line which transports gas from a common source of supply (gas main) to the customerpiping.3.3.16 spigota rigi
37、d profiled solid wall metallic tube, inserted into the PE, PA11 or PA12 piping serving as the stiffener in thearea of transition.3.3.17 transition fittinga fitting that makes a transition joint between two different types of piping materials. As used in thisStandard, it is the transition between the
38、 PE, PA11 or PA12 and the metallic pipes.3.3.18 transition jointthe joint at which two different piping materials (the PE, PA11 or PA12 and metal piping) are connected.4. Materials and ManufactureNOTE 2Materials used in components of the fitting that will be in long term contact with gas should be d
39、emonstrated by testing or history of successfulusage not to be adversely affected.4.1 General:4.1.1 All materials of the fitting shall meet the performance requirements of this specification. Specific materials referenced inthis section are common materials used in these types of products. Alternate
40、 materials proven to provide equal or betterperformance are acceptable.4.1.2 As per the recommendations of the respective resin manufacturers, no cross fusion between PA11 pipe and fittings andPA12 pipe and fittings is permitted. Alternatively, no cross fusion between PE pipe and fittings and either
41、 PA11 or PA12 pipe andfittings is permitted.4.2 Casings and Nipples:4.2.1 Rigid riser casings shall be constructed of Specification A53/A53M, Specification A513 or equivalent metallic materialswith a minimum nominal 0.065 in. (1.65 mm) wall thickness within the allowable tolerance ranges of the appl
42、icable metallic pipingspecification.4.2.2 Flex riser casings shall be constructed of plastic coated flexible metallic tubing providing a crush strength of not less than1000 lbs. When tested in accordance with UL 360, section 9.1. The flex shall also be capable of withstanding a tensile pull of 300lb
43、s force without breaking or unwinding.4.2.3 Riser nipples shall be constructed of Specification A53/A53M, or equivalent, steel pipe with a minimum of schedule 40wall thickness.4.2.4 All burrs on metal components, which could damage the PE, PA11 or PA12 piping, shall be removed prior to insertionof t
44、he PE, PA11 or PA12 piping so as to prevent any damage to the PE, PA11 or PA12 gas piping. Alternately, all such burrs shallbe suitably covered with a protective device such as an ID plastic sleeve, to preclude any damage to the PE, PA11 or PA12 gaspiping.4.3 Polyethylene Pipe (PE), Polyamide 11 (PA
45、11) and Polyamide 12 (PA12) Pipe:4.3.1 Polyethylene and pipe shall comply with the requirements of Specification D2513.4.3.2 Polyamide 11 pipe shall comply with the requirements of Specifications D2513-99 and F2945.4.3.3 Polyethylene and Polyamide 11 and Polyamide Polyamide 12 pipe shall comply with
46、 the requirements of SpecificationD2513F2785.4.4 Elastomers:4.4.1 Gas sealing elastomeric components shall be of materials compatible with all components of the fitting and the materialsof the pipes being joined, and shall be resistant to fuel gases.F1973 1334.5 Specifications outlining the physical
47、 and chemical properties of all fitting materials shall be available from the fittingmanufacturer upon request.5. Dimensions, Mass, and Permissible Variations5.1 Because of the varying designs, the actual spread of dimensions is quite different from manufacturer to manufacturer.Atableof dimensions a
48、nd tolerances encompassing these differences would be meaningless and without value and, therefore, are omittedfrom this specification.6. Design Qualification Requirements6.1 General:6.1.1 After initial testing, any revision to design adversely affecting performance requires retesting.6.2 Bend Radiu
49、s Requirements:6.2.1 The bend radius of anodeless risers shall not be less than 8 the diameter of the PE, PA11 or PA12 piping.NOTE 3If a bend radius of less than 8 the nominal PE, PA11 or PA12 pipe diameter is used the PE, PA11 or PA12 pipe manufacturer should becontacted to assure that their piping can accept a bend radius less than 8.6.3 Thread Requirements:6.3.1 All gas carrying steel pipe threads shall comply with ANSI/ASME B1.20.16.3.2 The polyethylene or polyamide 11 or polyamide 12 piping shall not be threaded.6.4 Flange
