1、Designation: F1055 16F1055 16aStandard Specification forElectrofusion Type Polyethylene Fittings for OutsideDiameter Controlled Polyethylene and CrosslinkedPolyethylene (PEX) Pipe and Tubing1This standard is issued under the fixed designation F1055; the number immediately following the designation i
2、ndicates 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*1.1 This specification covers electrofusio
3、n polyethylene fittings for use with outside diameter-controlled polyethylene pipe,covered by Specifications D2513, D2737, D3035, F714and, F714F2623, F2769 and crosslinked polyethylene (PEX), covered bySpecifications F876 and F2788/F2788M. Requirements for materials, workmanship, and testing perform
4、ance are included. Allrequirements for joining PE electrofusion fittings to PE pipe shall also apply to joining PE electrofusion fittings to PEX pipe.Where applicable in this specification “pipe” shall mean “pipe” or “tubing.”1.2 The values stated in inch-pound units are to be regarded as standard.
5、The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 The following safety hazards caveat pertains only to the test method portion, Section 9, of this specification:This standarddoes not purport to address a
6、ll of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D638 Test Method for
7、 Tensile Properties of PlasticsD1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal PressureD1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and FittingsD1600 Terminology for Abbreviated Terms Relating to PlasticsD2513 Specification
8、for Polyethylene (PE) Gas Pressure Pipe, Tubing, and FittingsD2737 Specification for Polyethylene (PE) Plastic TubingD3035 Specification for Polyethylene (PE) Plastic Pipe (DR-PR) Based on Controlled Outside DiameterD3350 Specification for Polyethylene Plastics Pipe and Fittings MaterialsF412 Termin
9、ology Relating to Plastic Piping SystemsF714 Specification for Polyethylene (PE) Plastic Pipe (DR-PR) Based on Outside DiameterF876 Specification for Crosslinked Polyethylene (PEX) TubingF905 Practice for Qualification of Polyethylene Saddle-Fused JointsF1473 Test Method for Notch Tensile Test to Me
10、asure the Resistance to Slow Crack Growth of Polyethylene Pipes and ResinsF2623 Specification for Polyethylene of Raised Temperature (PE-RT) SDR 9 TubingF2788/F2788M Specification for Metric and Inch-sized Crosslinked Polyethylene (PEX) PipeF2769 Specification for Polyethylene of Raised Temperature
11、(PE-RT) Plastic Hot and Cold-Water Tubing and DistributionSystems2.2 PPI Standards:3PPI TR-3 Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Pressure Design Basis (PDB), StrengthDesign Basis (SDB), and Minimum Required Strength (MRS) Rating for Thermoplastic Piping Materials o
12、r Pipe1 This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved Aug. 1, 2016Nov. 15, 2016. Published September 2016January 2017. Originally approved in 1987. Last previou
13、s edition approved in 20152016as F1055 15.F1055 16. DOI: 10.1520/F1055-16.10.1520/F1055-16A.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 Su
14、mmary page on the ASTM website.3 Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825, Irving, TX 75062, http:/www.plasticpipe.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 t
15、he 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 the official document.*A Summary
16、 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 States1PPI TR-4 HDB/SDB/PDB/MRS Listed Materials, PPI Listing of Hydrostatic Design Basis (HDB), Strength Design Basis(SDB), and Minimum R
17、equired Strength (MRS) Rating for Thermoplastic Piping Materials or Pipe2.3 ISO Standards:4ISO 13954 Plastics pipe and fittings Peel decohesion test for polyethylene (PE) electrofusion assemblies of nominal diametergreater than or equal to 90 mm3. Terminology3.1 DefinitionsDefinitions are in accorda
18、nce with Terminology F412, and abbreviations are in accordance with TerminologyD1600, unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 electrofusiona heat fusion joining process where the heat source is an integral part of the fitting, such that when electriccurren
19、t is applied, heat is produced that melts and joins the plastics.3.2.2 fusion interfacesurface in the heat fusion process where the plastic materials of the products being joined bond together.3.2.3 fusion zone lengthtotal length of the melted material in the fitting cross-section under evaluation.4
20、. Materials and Manufacture4.1 This specification covers fittings made from polyethylene compounds as defined in Specification D3350.4.1.1 Polyethylene material compounds suitable for use in the manufacture of electrofusion fittings under this specification shallmeet Specification D3350 and shall me
21、et Specification D3350 classification and property requirements shown in Table 1 and shallhave PPI TR-4 HDB and HDS listings at 73F (23C) and HDB listings at 140F (60C).4.2 Rework MaterialClean rework polyethylene material of the same resin, free of any wire or contaminants generated fromthe fitting
22、 manufacturers own production, may be used by the same manufacturer, as long as the fittings produced conform to therequirements of this specification.4.3 Heating MechanismThe heat mechanism shall be of materials and design not detrimental to the performance of the fittingor the pipe to which it is
23、intended to be joined. Heating mechanisms, such as wires or materials other than polyethylene, shall notexit the fitting in an area exposed to internal pressure. Heat mechanisms shall be of a design that ensures that wire terminationsare toward the outer edges of the fusion zone length and away from
24、 the pressure containing area. Examples of acceptable andunacceptable wire terminations are shown in Figs. 1-5.4.4 Removal of exterior layersFor PEX pipes containing an exterior non-PEX layer, such layers shall be completely removedaccording to the manufacturers instructions prior to making the elec
25、trofusion joint. The dimensions of the PEX pipe after removalof non-PEX exterior layer/s shall meet the requirements of the relevant tubing or pipe Specifications F876 or F2788/F2788M.4.4 PEX pipe utilizing a mid-wall non-PEX layer are outside the scope of this standard and therefore shall not be us
26、ed to qualifyfittings to this standard.Pipe with Layers:4.4.1 Pipe that has an exterior layer of material for color, or UV resistance, or oxygen transmission resistance, or as a removablelayer to keep the base pipe outer surface clean is acceptable when such layers comply with the applicable pipe sp
27、ecification. Whenthe exterior layer is a material other than the base pipe material, complete removal of the exterior layer prior to electrofusionjoining is required in order to achieve proper fusion.4 Available from International Organization for Standardization (ISO), ISO Central Secretariat, BIBC
28、 II, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,Switzerland, http:/www.iso.org.TABLE 1 Specification D3350 Classification Requirements ofPolyethylene Electrofusion Fitting MaterialsPhysical PropertiesCell Classification and Properties for PolyethyleneMaterialsPE2708 PE4710Density 2 4Melt I
29、ndex 3 or 4 4Flexural Modulus $4 $5Tensile Strength $3 $4Slow Crack Growth Re-sistance (F1473)7 7Hydrostatic StrengthClassification3 4Color and UV Stabilizer C or E C or EHDB at 73F (23C), psi(MPa)1250 (8.62) 1600 (11.03)F1055 16a24.4.2 When the exterior layer is removed, the outside diameter of the
30、 base pipe shall meet the outside diameter dimension andtolerance requirements of the applicable pipe specification.4.4.3 Mid-wall layer pipesElectrofusion fittings for pipe that has a mid-wall layer are outside of the scope of this standard.Pipe that has a mid-wall layer shall not be used to qualif
31、y fittings to this standard.5. Performance Requirements5.1 The following requirements are for electrofusion joints that have been joined using the manufacturers recommendedjoining procedures. These requirements must be met by each electrofusion joint design, on each size and type of pipe material fo
32、rwhich the manufacturer recommends use of his fitting. Any revisions to the electrofusion joint design or processing by themanufacturer after the initial testing requires retesting to ensure these requirements can still be met. Fittings intended for use inthe distribution of natural gas or liquid pe
33、troleum gas shall also meet the requirements of Specification D2513.5.1.1 Assemblies using PEX pipes joined with electrofusion fittings shall be limited to the HDS rating of the PE material of thefitting as per 4.1.1 with a maximum usage temperature of 140F.FIG. 1 Correct Wire Termination CouplingSi
34、ngle CoilFIG. 2 Correct Wire Termination CouplingDual CoilFIG. 3 Correct Wire TerminationSaddle FittingF1055 16a35.1.2 Assemblies using PEX pipes joined with electrofusion fittings shall not be used for distribution of natural gas or liquidpetroleum gas.5.1.3 It is not required that each configurati
35、on of a fitting be tested to meet all of these qualifications (that is, 2 in. main saddlejoint with multiple outlet configurations offered) as long as the electrofusion joint design is not altered in the configurationdifferences.NOTE 1It is permissible when accomplishing these tests, to do so on the
36、 highest and lowest dimension ratio of the same pipe material. If in thosetests all performance requirements are met, all dimension ratios between those tested may be considered as having met the requirements. These tests donot have to cover the full range of dimension ratios available, only the dim
37、ension ratio range on which the manufacturer recommends his fitting be used.5.2 Pressure Requirements:5.2.1 Minimum Hydraulic Burst PressureThe fitting and fused joint shall not fail when tested in accordance with 9.1. Theminimum hydraulic burst pressure at 73F (23C) of the test specimen shall not b
38、e less than that required to produce the minimumfiber stress in the pipe as required by the controlling pipe standard for the type of pipe used in the test. In no case shall the minimumhydraulic burst pressure be less than that required to produce 2520 psi (17.4 MPa) fiber stress in the pipe for med
39、ium density PE(density cell 2) and 2900 psi (20 MPa) fiber stress in the pipe for high density PE (density cell 3 or 4) test specimens when testedin accordance with 9.1. The test equipment, procedures, and failures definitions shall be as specified in Test Method D1599.5.2.2 Sustained PressureThe fi
40、tting and fused joint shall not fail when tested in accordance with 9.2. The test pressure,minimum time-to-failure, and test temperature shall be as required by the controlling pipe standard for the type of pipe used inthe test. Where the controlling pipe standard requires testing at multiple temper
41、atures, sustained pressure testing shall only beperformed at the highest test temperature, not to exceed 180F (82C). If a pipe standard is not specified, or does not contain testrequirements, the test pressure, minimum time-to-failure and test temperature shall be as shown in Table 2.5.3 Tensile Str
42、ength Requirements (Coupling Type Joints Only)The fitting or the pipe to fitting joint made on pipe shall notfail when tested in accordance with 9.3. Specimens shall be subjected to a tensile stress that causes the pipe to yield to anFIG. 4 Incorrect Wire Termination CouplingDual CoilFIG. 5 Incorrec
43、t Wire Termination SaddleSingle CoilF1055 16a4elongation no less than 25 % or causes the pipe to break outside the joint area. Tensile tests must be made on specimens as joined,not on straps cut from the specimen. Yielding must be measured only in the pipe, independent of the fitting or joint.5.3.1
44、Equipment needed to conduct full scale tensile tests for sizes 8 IPS and larger is not readily available; therefore, anoptional alternative to full-scale tensile tests for coupling-type joints 8 IPS and larger is included as mandatory information inAnnex A2. The tests performed in Annex A2 qualifies
45、 the fitting design in lieu of tensile strength requirements testing of 5.3 andthe joint crush test portion of 5.5. All other performance requirements in Section 5 shall be satisfied by testing to the requirementsusing the methods described in Section 9.5.4 Impact Resistance (Saddle Type Joints Only
46、)The joint made on the specimen shall not fail when impacted with a forcesufficient to break the body or other portion of the specimen. Tests of 500 ftlbf or higher impact with no failures noted shall beconsidered as a “pass” impact test. The device for testing and the methods shall be as defined in
47、 Practice F905.5.5 Joint Integrity Tests(Couplings and Saddle Type Joints)The joint made on the specimen shall meet the requirements in9.4 and 9.5 of this specification, when tested in accordance with 9.4.5.5.1 Equipment needed to perform crush testing to the procedure described in 9.4.1 for sizes 8
48、 IPS and larger is not readilyavailable, or can be hazardous to operate safely; therefore, an optional alternative to crush tests for coupling-type joints 8 IPS andlarger is included as mandatory information in Annex A2. Tests performed in Annex A2 qualify the fitting design in lieu of thejoint crus
49、h test portion of 9.4.1. All other performance requirements in Section 5 and 9.4 shall be satisfied by testing to therequirements using the methods described in 9.6. Dimensions, Mass, and Permissible Variations6.1 Dimension and tolerances of electrofusion fittings must be such that heat fusion is possible to outside diameter (OD)controlled PE pipes such as those listed in Specifications D2513, D2737, D3035, F714and, F714F2623 and, F2769 and PEX pipeslisted in Specifications F876 and F2788/F2788M, such that the joints will satisfy the pe
