1、Designation: F1973 131An 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; 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.1NOTE7.4.
3、3 was editorially revised in October 2013.1. Scope*1.1 This specification covers requirements and test methodsfor the qualification of factory assembled anodeless risers andtransition fittings, for use in polyethylene (PE), in sizes throughNPS 8, and Polyamide 11 (PA11) and Polyamide 12 (PA12), insi
4、zes through NPS 6, gas distribution systems.1.2 The test methods described are not intended to beroutine quality control tests.1.3 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 inform
5、ation onlyand are not considered standard.1.4 Throughout this specification footnotes are provided forinformational purposes and shall not be considered as require-ments of this specification.2. Referenced Documents2.1 ASTM Standards:2NOTE 1For over 40 years D2513 was the singular US CFR Title 49Par
6、t 192 referenced Standard Specification codifying the installation anduse of thermoplastic gas piping in jurisdictional installations. Initially allmaterials (PE, PVC, ABS, CAB) were contained within the body of thestandard D2513. In later years D2513 was completely reformatted to makeit more user f
7、riendly by moving material-specific requirements from thestandards body to mandatory annexes. The next major change occurredlate in 2009 at which time all thermoplastic materials, exceptpolyethylene, were removed from D2513 changing its Title and Scopefrom a thermoplastic gas piping standard to a po
8、lyethylene-only gaspiping standard. This recent change required that new standards bedeveloped for those materials that were removed from D2513 includingPA11. This causes problems for PA11 piping because it has beenreferenced and permitted for jurisdictional use and installation under USCFR Title 49
9、 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 piping standards intosomewhat of a limbo since D2513 is now a PE-only specification isreferenced in all of these standards. Th
10、erefore 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 standardsuch as this one. Until CFR Title 49 Part 192 references the newlydeveloped thermoplastic gas piping standards for those mat
11、erials 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 standard, all references to D2513 and this note willbe removed from these standards.A53/A53M Specification for Pipe, Steel, B
12、lack and Hot-Dipped, Zinc-Coated, Welded and SeamlessA513 Specification for Electric-Resistance-Welded Carbonand Alloy Steel Mechanical TubingD638 Test Method for Tensile Properties of PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2513 Specification for Thermoplastic Gas Press
13、ure Pipe,Tubing, and FittingsE515 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 Trac
14、king and Traceability EncodingSystem of Natural Gas Distribution Components (Pipe,Tubing, Fittings, Valves, and Appurtenances)F2945 Specification for Polyamide 11 Gas Pressure Pipe,Tubing, and Fittings2.2 Federal Standard:3CFR Title 49 Part 192 Transportation of Natural and OtherGas By Pipeline: Min
15、imum Federal Safety Standards1This specification 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 May 1, 2013. Published May 2013. Originallyapproved in 1999. Last previous edition approve
16、d in 2012 as F197312. DOI:10.1520/F1973-13.2For 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.3Available from St
17、andardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.*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.
18、 United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Bar
19、riers to Trade (TBT) Committee.12.3 ANSI Standards:ANSI B 31.8 Gas Transmission and Distribution PipingSystems4ANSI/ASME B1.20.1 Pipe Threads, General Purpose(inch)4ANSI B 16.5 Steel Pipe Flanges, Flanged Fittings42.4 ASME Standard:5ASME Boiler and Pressure Vessel Code2.5 API Standard:6API 1104 Stan
20、dard for Welding Pipelines and Related Fa-cilities2.6 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 RequiredStrength (MRS) Ratings for Thermoplastic Piping Mate-rials or Pipe3. Terminology3.1 Th
21、e gas industry terminology used in this specificationis in accordance withANSI B31.8 or the United States CFR 49Part 192, unless otherwise 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
22、 fuel gasunless specifically stated otherwise.3.2 DefinitionsDefinitions are in accordance with Defini-tions F412 unless otherwise specified. Abbreviations are inaccordance with Abbreviations D1600 unless otherwise speci-fied.3.3 Definitions:3.3.1 anodeless flex riser casinga flexible, plastic coate
23、d,metallic, non-gas carrying, protective outer sleeve portion of ananodeless riser which is sometimes selected as an alternate torigid riser casings.3.3.2 anodeless risera type of transition fitting which isdesigned to transport gas from an underground polyethylene orpolyamide 11 or polyamide 12 ser
24、vice line to above-groundsteel piping. In an anodeless riser, the polyethylene or poly-amide 11 or polyamide 12 pipe is always the gas carrier, atleast, in the below ground section.3.3.3 anodeless riser, flex designan anodeless riser wherethe rise leg is a transition fitting which is fabricated to a
25、nanodeless flex riser casing which is field bent to form the baseleg.3.3.3.1 DiscussionAnodeless flex risers usually require ariser bracket attached to a rigid supporting member to avoidmeter set loads from being transmitted to the thermoplasticservice line.3.3.4 anodeless riser nipplethe metallic,
26、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 anodelessriser.3.3.6 anodeless riser, rigid, straight and prebentan anode-less riser which is produced straight or facto
27、ry prebent, usually90, thus defining rise leg and base leg dimensions.3.3.7 base legthe steel horizontal portion of an anodelessriser measured from the centerline of vertical.3.3.8 Category 1a transition joint which provides forpressure tightness and resistance to end loads sufficient tocause no les
28、s than 25 % elongation of the PE, PA11 or PA12piping as described in this standard.3.3.9 Category 3a transition joint which provides forpressure tightness and resistance to end loads greater than themaximum thermal stress that would be produced by a tempera-ture change of 100F (55C).3.3.10 grade lev
29、el markinga marking, tape or label ap-plied to the riser to identify the point at which the transitionfrom PE, PA11 or PA12 gas carrier to metallic gas carrieroccurs. This marking assists the installer in determining thegrade level of the installation.3.3.11 insert stiffenera rigid, non-split, solid
30、 wall tubewhich is inserted into PE, PA11 or PA12 piping to supportcompression loads in the area of the transition joint.3.3.12 jointthe location at which two or more pieces ofpipe or a pipe and a fitting are connected.3.3.13 MAOPthe maximum allowable operating pressureof the fuel gas piping system,
31、 in psig, as determined inaccordance with US DOT CFR, Title 49, Part 192.121 and asrepresented in the following:MAOP 5 P 5 2 3S/R 2 1! 3fD(1)where:S = The Thermoplastic materials HDB as published in thePlastics Pipe Institute PPI TR 4 publication,R = The pipes dimension ratio determined by dividing
32、thepipes specified nominal outside diameter by the pipesspecified nominal wall thickness, andfD= the design (derating) factor for thermoplastic fuel gaspiping as set by the authority having jurisdiction. In theUnited States the design factor is cited in CFR Title 49Part 192.121.3.3.14 rise legthe ve
33、rtical portion of an anodeless risermeasured from the centerline of horizontal.3.3.15 service linea fuel gas distribution line which trans-ports gas from a common source of supply (gas main) to thecustomer piping.3.3.16 spigota rigid profiled solid wall metallic tube,inserted into the PE, PA11 or PA
34、12 piping serving as thestiffener in the area of transition.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.5Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave.,
35、 New York, NY 10016-5990, http:/www.asme.org.6Available from American Petroleum Institute (API), 1220 L. St., NW,Washington, DC 20005-4070, http:/www.api.org.7Available from Underwriters Laboratories (UL), 333 Pfingsten Rd.,Northbrook, IL 60062-2096, http:/.8Available from Plastics Pipe Institute (P
36、PI), 105 Decker Court, Suite 825,Irving, TX 75062, http:/www.plasticpipe.org.F1973 13123.3.17 transition fittinga fitting that makes a transitionjoint between two different types of piping materials. As usedin this Standard, it is the transition between the PE, PA11 orPA12 and the metallic pipes.3.3
37、.18 transition jointthe joint at which two differentpiping materials (the PE, PA11 or PA12 and metal piping) areconnected.4. Materials and ManufactureNOTE 2Materials used in components of the fitting that will be in longterm contact with gas should be demonstrated by testing or history ofsuccessful
38、usage not to be adversely affected.4.1 General:4.1.1 All materials of the fitting shall meet the performancerequirements of this specification. Specific materials refer-enced in this section are common materials used in these typesof products. Alternate materials proven to provide equal orbetter per
39、formance are acceptable.4.1.2 As per the recommendations of the respective resinmanufacturers, no cross fusion between PA11 pipe and fittingsand PA12 pipe and fittings is permitted. Alternatively, no crossfusion between PE pipe and fittings and either PA11 or PA12pipe and fittings is permitted.4.2 C
40、asings and Nipples:4.2.1 Rigid riser casings shall be constructed of Specifica-tion A53/A53M, Specification A513 or equivalent metallicmaterials with a minimum nominal 0.065 in. (1.65 mm) wallthickness within the allowable tolerance ranges of the appli-cable metallic piping specification.4.2.2 Flex
41、riser casings shall be constructed of plastic coatedflexible metallic tubing providing a crush strength of not lessthan 1000 lbs. When tested in accordance with UL360, section9.1. The flex shall also be capable of withstanding a tensile pullof 300 lbs force without breaking or unwinding.4.2.3 Riser
42、nipples shall be constructed of SpecificationA53/A53M, or equivalent, steel pipe with a minimum ofschedule 40 wall thickness.4.2.4 All burrs on metal components, which could damagethe PE, PA11 or PA12 piping, shall be removed prior toinsertion of the PE, PA11 or PA12 piping so as to prevent anydamag
43、e to the PE, PA11 or PA12 gas piping. Alternately, allsuch burrs shall be suitably covered with a protective devicesuch as an ID plastic sleeve, to preclude any damage to the PE,PA11 or PA12 gas piping.4.3 Polyethylene Pipe (PE), Polyamide 11 (PA11) andPolyamide 12 (PA12) Pipe:4.3.1 Polyethylene and
44、 pipe shall comply with the require-ments of Specification D2513.4.3.2 Polyamide 11 pipe shall comply with the requirementsof Specifications D2513-99 and F2945.4.3.3 Polyamide 12 pipe shall comply with the requirementsof Specification F2785.4.4 Elastomers:4.4.1 Gas sealing elastomeric components sha
45、ll be of mate-rials compatible with all components of the fitting and thematerials of the pipes being joined, and shall be resistant to fuelgases.4.5 Specifications outlining the physical and chemical prop-erties of all fitting materials shall be available from the fittingmanufacturer upon request.5
46、. Dimensions, Mass, and Permissible Variations5.1 Because of the varying designs, the actual spread ofdimensions is quite different from manufacturer to manufac-turer.Atable of dimensions and tolerances encompassing thesedifferences would be meaningless and without value and,therefore, are omitted f
47、rom this specification.6. Design Qualification Requirements6.1 General:6.1.1 After initial testing, any revision to design adverselyaffecting performance requires retesting.6.2 Bend Radius Requirements:6.2.1 The bend radius of anodeless risers shall not be lessthan 8 the diameter of the PE, PA11 or
48、PA12 piping.NOTE 3If a bend radius of less than 8 the nominal PE, PA11 or PA12pipe 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 compl
49、y withANSI/ASME B1.20.16.3.2 The polyethylene or polyamide 11 or polyamide 12piping 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 pressure containing factory welding shallcomply with the requirements of the United States Code ofFederal Regulations, Title 49, Part 192, Subpart D or inaccordance with ASME Boiler and Pressure Vessel Code,Section IX or API 1104.6.6 Temperature Cycling:6.6.1 The joint shall be leak-free after ten temperature c
