1、Designation: F1973 08F1973 12 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:2A53/A53M Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessA513 Speci
6、fication 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 Polyethylene (PE) Gas Pressure Pipe, Tubing, and FittingsE515 Practice for Leaks Usin
7、g Bubble Emission TechniquesF412 Terminology Relating to Plastic Piping SystemsF1588 Test Method for Constant Tensile Load Joint Test (CTLJT)F2897 Specification for Tracking and Traceability Encoding System of Natural Gas Distribution Components (Pipe, Tubing,Fittings, Valves, and Appurtenances)2.2
8、US Government Document:United States Code of Federal Regulations Title 49 Part 19232.3 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 ASME Standard:ASME Boiler and
9、 Pressure Vessel Code51 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 July 1, 2008Nov. 1, 2012. Published July 2008January 2013. Originally approved in 1999. Last pr
10、evious edition approved in 20052008 asF197305.08. DOI: 10.1520/F1973-08.10.1520/F1973-12.2 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
11、ry page on the ASTM website.3 Available from Superintendent of Documents, US Government Printing Office, Washington, DC 20402.4 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 Mechanic
12、al Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.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 no
13、t 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 the official document.*A Summary of Changes section appears at the en
14、d of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.5 API Standard:API 1104 Standard for Welding Pipelines and Related Facilities62.6 UL Standard:UL 360 Flexible Metal Hose72.7 PPI Standard:PPI TR-4 PPI Listing of Hydr
15、ostatic Design Bases (HDB), Pressure Design Bases (PDB) and Minimum Required Strength(MRS) Ratings for Thermoplastic Piping Materials or Pipe83. Terminology3.1 The gas industry terminology used in this specification is in accordance withANSI B31.8 or the United States CFR 49 Part192, unless otherwis
16、e indicated.3.1.1 The term “pipe” used herein refers to both “pipe” and “tubing” unless 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 speci
17、fied. Abbreviations are inaccordance with Abbreviations D1600 unless otherwise specified.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
18、riser casings.3.3.2 anodeless risera type of transition fitting which is designed 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
19、carrier, at least, in the below ground section.3.3.3 anodeless riser, flex designan 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
20、 bracket attached to a rigid supporting member to avoid meter set loads from beingtransmitted 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-
21、gas carrying protective outer sleeve portion of an anodeless riser.3.3.6 anodeless 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
22、riser measured from the centerline of vertical.3.3.8 Category 1a transition joint 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 pr
23、ovides for pressure tightness and resistance to end loads greater than the maximumthermal stress that would be produced by a temperature change of 100F (55C).3.3.10 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
24、 carrier to metallic gas carrier occurs. This marking assists the installer in determining the grade level of 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.
25、12 jointthe location at which two or more pieces of pipe or a pipe and a fitting are connected.3.3.13 MAOPthe 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 523
26、S/R 21!3fD (1)where:S = The Thermoplastic materials HDB as published in the Plastics Pipe Institute PPI TR 4 publication,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 R
27、d., Northbrook, IL 60062-2096, http:/.8 Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825, Irving, TX 75062, http:/www.plasticpipe.org.F1973 122R = The pipes dimension ratio determined by dividing the pipes specified nominal outside diameter by the pipes specifiednominal wall
28、 thickness, andfD = the design (derating) factor for thermoplastic fuel gas piping as set by the authority having jurisdiction. In the United Statesthe design 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 horizo
29、ntal.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 rigid profiled solid wall metallic tube, inserted into the PE, PA11 or PA12 piping serving as the stiffener in thearea of transition.3.3.17 transit
30、ion fittinga fitting that makes a transition joint between two different types of piping materials. As used in thisStandard, it is the transition between the 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 met
31、al piping) are connected.4. Materials and ManufactureNOTE 1Materials used in components of the fitting that will be in long term contact with gas should be demonstrated 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
32、 performance requirements of this specification. Specific materials referenced inthis section are common materials used in these types of products. Alternate materials proven to provide equal or betterperformance are acceptable.4.1.2 As per the recommendations of the respective resin manufacturers,
33、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 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, S
34、pecification A513 or equivalent metallic materialswith a minimum nominal 0.065 in. (1.65 mm) wall thickness within the allowable tolerance ranges of the applicable metallic pipingspecification.4.2.2 Flex riser casings shall be constructed of plastic coated flexible metallic tubing providing a crush
35、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 300lbs force without breaking or unwinding.4.2.3 Riser nipples shall be constructed of Specification A53/A53M, or equivalent, steel pipe with a mini
36、mum 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 the 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
37、 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 (PA11) and Polyamide 12 (PA12) Pipe:4.3.1 Polyethylene and Polyamide 11 and Polyamide 12 pipe shall comply with the requirements of Specification
38、D2513.4.4 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.4.5 Specifications outlining the physical and chemical properties of all fitting material
39、s 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 and tolerances encompassing these differences wou
40、ld 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 Radius Requirements:6.2.1 The bend radius of anodeles
41、s risers shall not be less than 8 the diameter of the PE, PA11 or PA12 piping.NOTE 2If 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.F1973 1236
42、.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 Requirements:6.4.1 All steel flanges shall comply with ANSI B 16.5.6.5 Welding Requirements:6.5.1 All gas
43、 pressure containing factory welding shall comply with the requirements of the United States Code of FederalRegulations, Title 49, Part 192, Subpart D or in accordance withASME Boiler and Pressure Vessel Code, Section IX orAPI 1104.6.6 Temperature Cycling:6.6.1 The joint shall be leak-free after ten
44、 temperature cycle tests as tested at a minimum of 1.5 MAOP and 7 6 3 psig inaccordance with 7.4.6.7 Tensile Pull Test Requirements :6.7.1 Transition joints in transition fittings and anodeless risers in PE, PA11 or PA12 sizes below NPS 4 shall be proven to beof full restraint/full seal Category 1 d
45、esign. The joint qualifies under this requirement if the pipe is pulled to a minimum of 25 %elongation, as indicated by when the length of the unrestrained PE, PA11 or PA12 piping has been elongated to 125 % of its originallength, when tested in accordance with 7.3, and is bubble tight in accordance
46、 with 6.7.3. No leakage or pullout is permitted.6.7.2 In PE, PA11 or PA12 sizes NPS 4 and larger the joint shall be qualified to be of either Category 1 design as in 6.7.1, orof Category 3 design by pull testing to tensile stress equal to or greater than the maximum tensile stress that would be prod
47、ucedby a temperature change of 100F (38C) when tested in accordance with 7.3. No leakage or pullout is permitted in accordancewith 6.7.3. Failure of one sample constitutes failure of this test.NOTE 3Sample calculations are shown in Specification D2513 section X2.4 Thermal Stress.6.7.3 The samples sh
48、all be leak tested at 7 6 3 psig and a minimum of 1.5 MAOP, prior to, and at the end of the test whilestill under tensile load and immediately following the tensile test. No leakage shall be permitted when tested in accordance with7.2.6.7.4 Each nominal size transition design, in medium density PE,
49、PA11 or PA12 shall be tested, except testing of the heaviestwall (lowest SDR) polyethylene or polyamide 11 and polyamide 12 piping shall qualify all thinner wall polyethylene or polyamide11 or polyamide 12 pipe joints of the same outside diameter.6.7.5 The polyethylene, polyamide 11 or polyamide 12 pipe, in the transition compression zone(s), shall be fully supported byan inserted stiffener or spigot which, by design, has no sharp O.D. burrs capable of damaging the polyethylene, polyamide 11 andpolyamide 12 pipe during assemb
