1、Designation: F 1973 05An American National StandardStandard Specification forFactory Assembled Anodeless Risers and TransitionFittings in Polyethylene (PE) and Polyamide 11 (PA11) FuelGas Distribution Systems1This standard is issued under the fixed designation F 1973; the number immediately followin
2、g 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification
3、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), in sizes through NPS 6, gasdistribution systems.1.2 The test methods described are not intended to ber
4、outine quality control tests.1.3 The values given in parentheses are for informationalpurposes only.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:2A53 Spe
5、cification for Pipe, Steel, Black and Hot-Dipped,Zinc-Coated, Welded and SeamlessA 513 Specification for Electric-Resistance-Welded Carbonand Alloy Steel Mechanical TubingD 638 Test Method for Tensile Property of PlasticsD 1600 Abbreviations of Terms Relating to PlasticsD 2513 Specification for Ther
6、moplastic Gas Pressure Pipe,Tubing and FittingsE 515 Test Method for Leaks Using Bubble Emission Tech-niquesF 412 Terminology Relating to Plastic Piping SystemsF 1588 Test Method for Constant Tensile Load Joint Test(CTLJT)2.2 US Government Document:United States Code of Federal Regulations Title 49
7、Part19232.3 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:ASME Boiler and Pressure Vessel Code52.5 API Standard:API 1104 Standard for Welding Pipeline
8、s and RelatedFacilities62.6 UL Standard:UL 360 Flexible Metal Hose72.7 PPI Standard:PPI TR-4 PPI Listing of Hydrostatic Design Bases (HDB),Pressure Design Bases (PDB) and Minimum RequiredStrength (MRS) Ratings for Thermoplastic Piping Mate-rials or Pipe83. Terminology3.1 The gas industry terminology
9、 used in this specificationis in accordance with ANSI 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 fuel gasunless specifica
10、lly stated otherwise.3.2 DefinitionsDefinitions are in accordance with Defini-tions F 412 unless otherwise specified. Abbreviations are inaccordance with Abbreviations D 1600 unless otherwise speci-fied.1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and
11、is the direct responsibility of Subcommittee F17.60 on Gas.Current edition approved Nov. 1, 2005. Published November 2005. Originallyapproved in 1999. Last previous edition approved in 2002 as F197302.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Servi
12、ce at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Superintendent of Documents, US Government Printing Office,Washington, DC 20402.4Available from American National Standards Institute (ANSI), 25
13、 W. 43rd St.,4th Floor, New York, NY 10036.5Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990.6Available fromAmerican Petroleum Institute, 1220 L St., NW, Washington, DC20005.7Available from Underwriters Laborator
14、ies, 333 Pfingsten Rd., Northbrook, IL60062.8Available from Plastics Pipe Institute, Inc., 1825 Connecticut Ave., NW, Suite680, Washington, DC 20009.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.1 anodeless flex riser casinga f
15、lexible, plastic coated,metallic, non-gas carrying, protective outer sleeve portion of ananodeless riser which is sometimes selected as an alternate torigid riser casings.3.2.2 anodeless risera type of transition fitting which isdesigned to transport gas from an underground polyethylene orpolyamide
16、11 service line to above-ground steel piping. In ananodeless riser, the polyethylene or polyamide 11 pipe isalways the gas carrier, at least, in the below ground section.3.2.3 anodeless riser, flex designan anodeless riser wherethe rise leg is a transition fitting which is fabricated to ananodeless
17、flex riser casing which is field bent to form the baseleg.3.2.3.1 DiscussionAnodeless flex risers usually require ariser bracket attached to a rigid supporting member to avoidmeter set loads from being transmitted to the polyethyleneservice line.3.2.4 anodeless riser nipplethe metallic, aboveground,
18、gas carrying pipe or fitting portion of an anodeless riser.3.2.5 anodeless riser rigid riser casingthe metallic, non-gas carrying protective outer sleeve portion of an anodelessriser.3.2.6 anodeless riser, rigid, straight and prebentan an-odeless riser which is produced straight or factory prebent,u
19、sually 90, thus defining rise leg and base leg dimensions.3.2.7 base legthe steel horizontal portion of an anodelessriser measured from the centerline of vertical.3.2.8 Category 1a transition joint which provides forpressure tightness and resistance to end loads sufficient tocause no less than 25 %
20、elongation of the PE or PA11 piping asdescribed in this standard.3.2.9 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).3.2.10 grade level markinga markin
21、g, tape or label ap-plied to the riser to identify the point at which the transitionfrom PE or PA11 gas carrier to metallic gas carrier occurs. Thismarking assists the installer in determining the grade level ofthe installation.3.2.11 insert stiffenera rigid, non-split, solid wall tubewhich is inser
22、ted into the polyethylene or polymide 11 pipingto support compression loads in the area of the transition joint.3.2.12 jointthe location at which two or more pieces ofpipe or a pipe and a fitting are connected.3.2.13 MAOPthe maximum allowable operating pressureof the fuel gas piping system, in psig,
23、 as determined inaccordance with US DOT CFR, Title 49, Part 192.121 and asrepresented in the following:MAOP 5 P 5 2 3 S /R1!3 fD(1)where:S = The Thermoplastic materials HDB as published inthe Plastics Pipe Institute PPI TR 4 publication,R = The pipes dimension ratio determined by dividing thepipes s
24、pecified 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. Inthe United States the design factor is cited in CFRTitle 49 Part 192.121.3.2.14 rise legthe vertical por
25、tion of an anodeless risermeasured from the centerline of horizontal.3.2.15 service linea fuel gas distribution line which trans-ports gas from a common source of supply (gas main) to thecustomer piping.3.2.16 spigota rigid profiled solid wall metallic tube,inserted into the PE or PA11 piping servin
26、g as the stiffener inthe area of transition.3.2.17 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 or PA11 andthe metallic pipes.3.2.18 transition jointthe joint at which two differ
27、entpiping materials (the PE or PA11 and metal piping) areconnected.4. Materials and ManufactureNOTE 1Materials used in components of the fitting that will be in longterm contact with gas should be demonstrated by testing or history ofsuccessful usage not to be adversely affected.4.1 General:4.1.1 Al
28、l 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 performance are acceptable.4.2 Casings and Nipples:4.2.1 R
29、igid riser casings shall be constructed of Specifica-tion A53, Specification A 513 or equivalent metallic materialswith a minimum nominal 0.065 in. (1.65 mm) wall thicknesswithin the allowable tolerance ranges of the applicable metallicpiping specification.4.2.2 Flex riser casings shall be construct
30、ed of plastic coatedflexible metallic tubing providing a crush strength of not lessthan 1000 lbs. When tested in accordance with UL 360, section9.1. The flex shall also be capable of withstanding a tensile pullof 300 lbs force without breaking or unwinding.4.2.3 Riser nipples shall be constructed of
31、 SpecificationA53, or equivalent, steel pipe with a minimum of schedule 40wall thickness.4.2.4 All burrs on metal components, which could damagethe PE or PA11 piping, shall be removed prior to insertion ofthe PE or PA11 piping so as to prevent any damage to the PEor PA11 gas piping. Alternately, all
32、 such burrs shall be suitablycovered with a protective device such as an ID plastic sleeve,to preclude any damage to the PE or PA11 gas piping.4.3 Polyethylene Pipe (PE) and Polyamide 11 (PA11) Pipe:4.3.1 Polyethylene and Polyamide 11 pipe shall complywith the requirements of Specification D 2513.4.
33、4 Elastomers:4.4.1 Gas sealing elastomeric components shall be of mate-rials compatible with all components of the fitting and thematerials of the pipes being joined, and shall be resistant to fuelgases.F19730524.5 Specifications outlining the physical and chemical prop-erties of all fitting materia
34、ls shall be available from the fittingmanufacturer upon request.5. 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 wo
35、uld be meaningless and without value and,therefore, are omitted from 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 anodeles
36、s risers shall not be lessthan 83 the diameter of the PE or PA11 piping.NOTE 2If a bend radius of less than 83 the nominal PE or PA11 pipediameter is used the PE or PA11 pipe manufacturer should be contacted toassure that their piping can accept a bend radius less than 83.6.3 Thread Requirements:6.3
37、.1 All gas carrying steel pipe threads shall comply withANSI/ASME B1.20.16.3.2 The polyethylene or polyamide 11 piping shall not bethreaded.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 shallco
38、mply 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 cycletests as tested at a minimu
39、m of 1.5 3 MAOP and 7 6 3 psigin accordance with 7.4.6.7 Tensile Pull Test Requirements:6.7.1 Transition joints in transition fittings and anodelessrisers in PE or PA11 sizes below NPS 4 shall be proven to beof full restraint/full seal Category 1 design. The joint qualifiesunder this requirement if
40、the pipe is pulled to a minimum of25 % elongation, as indicated by when the length of theunrestrained PE or PA11 piping has been elongated to 125 % ofits original length, when tested in accordance with 7.3, and isbubble tight in accordance with 6.7.3. No leakage or pullout ispermitted.6.7.2 In PE or
41、 PA11 sizes NPS 4 and larger the joint shall bequalified to be of either Category 1 design as in 6.7.1,orofCategory 3 design by pull testing to tensile stress equal to orgreater than the maximum tensile stress that would be pro-duced by a temperature change of 100F (38C) when tested inaccordance wit
42、h 7.3. No leakage or pullout is permitted inaccordance with 6.7.3. Failure of one sample constitutes failureof this test.NOTE 3Sample calculations are shown in Specification D 2513 sec-tion X2.4 Thermal Stress.6.7.3 The samples shall be leak tested at 7 6 3 psig and aminimum of 1.5 3 MAOP, prior to,
43、 and at the end of the testwhile still under tensile load and immediately following thetensile test. No leakage shall be permitted when tested inaccordance with 7.2.6.7.4 Each nominal size transition design, in medium den-sity PE, high density PE, and polyamide 11 (or PA11) shall betested, except te
44、sting of the heaviest wall (lowest SDR)polyethylene or ployamide 11 piping shall qualify all thinnerwall polyethylene or polyamide 11 pipe joints of the sameoutside diameter.6.7.5 The polyethylene or ployamide 11 pipe, in the transi-tion compression zone(s), shall be fully supported by aninserted st
45、iffener or spigot which, by design, has no sharp O.D.burrs capable of damaging the polyethylene pipe duringassembly.6.8 Leak Test:6.8.1 The transition joint shall be leak free when leak testedat 7 6 3 psig and at a minimum of 1.53 the MAOP at both73.4 6 3.6F (23 6 2C) and 20 6 3.6F (29 6 2C) inaccor
46、dance with 7.2.6.9 Constant Tensile Load Joint TestCTLJT:6.9.1 Test one specimen in accordance with Test MethodF 1588 unless excepted below.6.9.2 The fiber stress shall be as follows:6.9.2.1 1,320 psi for PE piping.6.9.2.2 2,500 psi for PA11 piping.6.9.3 The duration of the test shall be 1000 h.6.9.
47、4 The samples shall be leak tested at 7 6 3 psig and aminimum of 1.5 3 MAOP, prior to, at the end of the test (whilestill under tensile load and immediately following the CTLJT.No leakage shall be permitted when tested in accordance with7.2.6.10 Coatings:6.10.1 Riser and transition fitting coatings,
48、 if any, shall be asagreed upon between the buyer and seller.6.11 Riser Flex Connection:6.11.1 The connection between the riser flex and the anode-less riser shall be demonstrated to withstand a pull force greaterthan 300 lb when tested in accordance with 7.3 except no leaktests shall be conducted.
49、Separation of the flex or the separationof the flex from the riser or adapter shall constitute failure ofthis test. Test one representative specimen.6.12 Transition Zone Identification:6.12.1 Each anodeless riser shall be clearly marked to showthe installer at what point the transition from plastic to metalgas carrier is made. This marking shall have verbiage such as“grade level”, “transition zone” or be described in the manu-facturers literature as the indication of grade level.NOTE 4The marking described is used by the installer to determinet
