1、Designation: F2176 17 An American National StandardStandard Specification forMechanical Couplings Used on Polyethylene Conduit, Ductand Innerduct1This standard is issued under the fixed designation F2176; the number immediately following the designation indicates the year oforiginal adoption or, in
2、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 establishes requirements for material,performance, workmanship a
3、nd test methods for the qualifica-tion of 2 in. and smaller mechanical couplings that connect toSDR 13.5, DR 15.5, Schedule 40 and Schedule 80 polyethyl-ene conduit, duct and innerduct covered by SpecificationF2160. Throughout this standard, “conduit” refers to “conduit,duct or innerduct” manufactur
4、ed in accordance with Specifi-cation F2160.NOTE 1F2176 fittings are not applicable to True-sized and ID-controlled conduit per F2160.1.2 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
5、information onlyand are not considered standard.1.3 The couplings covered by this specification are typicallydesigned to join between conduit ends (in-line coupling). Thesame coupling-to-conduit joint design may be used as a part ofother coupling joint designs that telescope, or connect tobulkheads,
6、 or other adapter fitting designs. The requirements ofthis standard apply only to the coupling-to-conduit jointdesign. The performance requirements of other coupling jointdesigns are not a part of this standard.1.4 The following safety hazards caveat pertains only to thetest methods portion, Section
7、 9 of this specification.Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety, health, andenvironmental practices and determine the applicability ofregulatory limitati
8、ons prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization Tec
9、hnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D638 Test Method for Tensile Properties of PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2444 Test Method for Determination of the Impact Resis-tance of Thermoplastic Pipe and Fittings by Means
10、of aTup (Falling Weight)F412 Terminology Relating to Plastic Piping SystemsF2160 Specification for Solid Wall High Density Polyethyl-ene (HDPE) Conduit Based on Controlled Outside Diam-eter (OD)3. Terminology3.1 Definitions are in accordance with Terminology F412and abbreviations are in accordance w
11、ith Terminology D1600,unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 coupling joint, nthe connection between the cou-pling and a conduit end.3.2.2 duct, na conduit (see Terminology F412, conduit).3.2.3 inline mechanical couplings, na device used to jointwo condui
12、t ends.3.2.4 innerduct, na conduit installed inside a conduit.4. Materials and Manufacture4.1 The physical properties of each material used to producemechanical couplings shall be available from the couplingmanufacturer upon request.4.2 Specifications outlining all the physical properties andeffects
13、 of environmental conditions for materials of manufac-ture shall be available from the coupling manufacturer uponrequest.NOTE 2Materials should have a demonstrated resistance to environ-mental stress cracking when exposed, under stress, to chemical com-pounds encountered in or external to conduit sy
14、stems and a demonstratedresistance to bacteriological decomposition. Such compounds include, but1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved Sept. 1, 2017. Pub
15、lished September 2017. Originallyapproved 2002. Last previous edition approved in 2009 as F217602(2009). DOI:10.1520/F2176-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information,
16、 refer to the standards Document Summary page onthe ASTM website.*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 StatesThis international standard was developed in accordance w
17、ith 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 Barriers to Trade (TBT) Committee.1are not limited to, alkalines, fertiliz
18、ers, ice thawing chemicals,insecticides, herbicides, and acids.5. Performance Requirements5.1 The following requirements shall be met on each cou-pling design and nominal size. Any revisions by the manufac-turer to the original coupling design after the initial qualifica-tion testing requires retest
19、ing to ensure conformance with theserequirements. All coupling/conduit joint assemblies shall beprepared in accordance with 8.2.NOTE 3It is permissible when accomplishing these tests to do so ononly the thickest and thinnest (lowest and highest DR) conduit wallsections in Specification F2160 that th
20、e coupling is to be used on. If inthose tests all performance requirements are met, all wall thicknessesbetween those tested may be considered as having met the requirements.5.2 Pressure Requirements:5.2.1 Sustained Internal PressureThe coupling/conduitjoint assemblies shall not fail by leakage as d
21、escribed by andtested in accordance with 9.1.5.2.2 Sustained External PressureThe coupling/conduitjoint assemblies shall not fail by leakage as described by andtested in accordance with 9.2.5.3 Tensile Strength Requirements :5.3.1 Pullout ResistanceThe coupling/conduit joint as-semblies shall comply
22、 with tensile loading requirements inTable 1 when tested in accordance with 9.3.NOTE 4Minimum pullout resistances in Table 1 were derived by thefollowing formula. Double the requirements for constant tensile load inTable 2.5.4 Constant Tensile LoadThe joint or coupling shall notfail by pullout when
23、loaded to axial tensile load requirementsin Table 2 and tested in accordance with 9.4.NOTE 5The constant tensile load test is intended to demonstrate thata joint in the conduit system is resistant to the effects of long term creepthat may result from temperature changes and other forces after instal
24、la-tion. Load values in Table 2 were derived by the following methodology.Nominal modulus of elasticity of high density polyethylene (113 000 psi) coefficient of thermal expansion (0.00011 in./in./F) 50F (10C)temperature change average area of DR11 conduit wall.5.5 Impact ResistanceCoupling specimen
25、s, not as part ofassemblies, shall not fail as defined by and tested in accordancewith 9.5.6. Dimensions6.1 The manufacturer, upon request of the user shall furnishcritical dimensions and tolerances of his couplings.NOTE 6Because of the varied fitting designs of couplings available foruse on PE cond
26、uit a table of dimensions would be meaningless andwithout value and is therefore omitted from this standard.7. Workmanship, Finish, and Appearance7.1 The manufacture of these couplings shall be in accor-dance with good commercial practice, uniform in color andfree of visual defects such as burrs, cr
27、acks, holes, foreignmaterials or voids so as to produce fittings meeting therequirements of this standard.8. Specimen Preparation8.1 Conditioning:8.1.1 Unless otherwise specified, condition the specimens(coupling and conduit) at the standard laboratory temperatureof 73.4 6 3.6F (23 6 2C) for not les
28、s than 16 h beforeassembly.8.2 Preparation of Specimens for Testing:8.2.1 Prepare test specimens so that the minimum freelength of conduit from a joint being tested is not less than fivetimes the conduit diameter. It is permissible to test multiplecouplings together provided they are separated by a
29、minimumdistance equal to five times the conduit diameter.8.2.2 Test joints shall be assembled on the appropriate sizeconduit in accordance with the fitting manufacturers joiningprocedure. For referee testing, conduit shall be straight with noscratches or gouges.8.2.3 Condition assembled test specime
30、ns a minimum of 2 hat the test temperature to be used after being assembled beforeinitiating test procedure.NOTE 7The additional conditioning time following assembly oftypical fitting designs used for conduit joining provides more consistenttest results.8.3 Test ConditionsTesting shall be conducted
31、at thestandard laboratory temperature of 73.4 6 3.6F (23 6 2C)unless otherwise specified.9. Test Methods9.1 Sustained Internal Pressure Test:9.1.1 Test six joints assembled in accordance with 8.2.Pressurize specimens with air to 150 6 2 psig (1030 6 10 kPa)and hold at pressure while top of fitting i
32、s submerged in waterat a depth of 6.00 6 0.50 in. (152.4 6 12.7 mm) for one hour.Then, visually monitor the specimens. The coupling shall notfail by leaking as defined by visual bubbles coming from thecoupling/conduit interface at a rate greater than one bubble persecond.NOTE 8Warning: Pressure test
33、ing with air at the pressures in 9.1.1can be hazardous in the event of a catastrophic failure of the test specimen.Specimens under pressure should be observed through a transparent shieldor other means to assure the safety of the observers.9.1.2 Failure of two of the six specimens shall constitutefa
34、ilure of the test. Failure of one of the six specimens tested iscause for retest of six additional specimens. Failure of one ofthe six specimens in the re-test shall constitute failure of thetest.TABLE 1 Mechanical Joint Pullout ResistanceNominal ConduitSizeMinimum PulloutResistance34 IPS 380 lbs (1
35、72 kg)1 IPS 760 lbs (345 kg)114 IPS 940 lbs (426 kg)112 IPS 1220 lbs (553 kg)2 IPS 1920 lbs (871 kg)TABLE 2 Mechanical Joint Constant Load ResistanceNominal ConduitSizeMinimum PulloutResistance34 IPS 190 lbs (86.2 kg)1 IPS 380 lbs (172.4 kg)114 IPS 470 lbs (213.2 kg)112 IPS 610 lbs (276.7 kg)2 IPS 9
36、60 lbs (435.5 kg)F2176 1729.2 Sustained External Pressure Test:9.2.1 Test six joints assembled in accordance with 8.2.Externally pressurize the specimen utilizing a suitable pressurevessel. Pressurize the vessel with water to 10 psi (69 kPa) andmonitor for leakage for 1000 h. Leakage of water into t
37、heconduit constitutes failure of the joint.NOTE 9It is permissible rather than the external test as described in9.2.1 to draw a vacuum on the test specimens while submerged in waterat a depth of not more than 6 in. (152.4 mm).9.2.2 Failure of two of the six specimens tested shallconstitute failure o
38、f the test. Failure of one of the six specimenstested is cause for re-test of six additional specimens. Failure ofone of the six specimens in re-test shall constitute failure of thetest.9.3 Tensile Strength Test:9.3.1 In-line couplings shall be tested with the apparatusspecified in Test Method D638.
39、9.3.2 Test six joint specimens assembled in accordance with8.2. The speed of the testing shall be 0.2 in./min (5.0 mm/min)625 %. The joint design fails if the minimum load require-ments specified in Table 1 are not reached.9.3.3 Failure of two of the six specimens tested shallconstitute failure of t
40、he test. Failure of one of the six specimenstested to achieve the minimum load specified in Table 1 iscause for re-test of six additional specimens. Failure of one ofthe six additional specimens to achieve the minimum load inthe re-test shall constitute failure of the test.9.4 Constant Tensile Load
41、Test :9.4.1 One specimen of each nominal pipe size couplingshall be tested by application of axial in line loading to thevalues stated in Table 2 for a minimum time period of 1000 h.NOTE 10Any loading method that maintains the correct, in-linetensile load on the joint for the required duration is ac
42、ceptable. Deadweight (a pile of scrap iron or steel) has worked well for loads up to 2000lbs (907 kg).9.4.2 Conduit pulling out of the coupling specimen beforethe test time is completed constitutes failure of the test.9.5 Impact Test:9.5.1 Select six coupling specimens at random and condi-tion in fr
43、eezer at 10 6 5F (-12 6 2C) for not less than 16 h.9.5.2 Remove the specimens from the freezer one at a timeand within 30 s after removal impact with a force of 20 ft-lbfusing Tup “B” as described in Test Method D2444.9.5.3 Visually inspect each specimen after impact test forfailure. Failure is defi
44、ned as shattering or any crack or splitcreated by the impact that can be seen with the naked eye.9.5.4 Failure of two of the six specimens tested shallconstitute failure of the test. Failure of one of the six specimenstested is cause for retest of six additional specimens. Failure ofone of the six a
45、dditional specimens in retest shall constitutefailure of the test.10. Product Marking10.1 The coupling shall be marked with the followinginformation. Required markings shall remain legible undernormal handling up to the time of installation.10.1.1 Manufacturers name or trademark.10.1.2 Size of the c
46、onduit suitable for joining by thecoupling.10.1.3 This specification, ASTM F2176.11. Installation Instructions11.1 Manufacturers installation instructions shall be sup-plied with the coupling packaging.12. Quality Assurance12.1 When the product is marked with “ASTM F2176,” themanufacturer affirms th
47、at the product was manufactured,inspected, sampled and tested in accordance with this specifi-cation and has been found to meet the requirements of thisspecification.13. Keywords13.1 conduit; duct; innerduct; mechanical fittingSUMMARY OF CHANGESCommittee F17 has identified the location of selected c
48、hanges to this standard since the last issue(F217602(2009) that may impact the use of this standard.(1) Revised Scope 1.1.(2) Added Note 1.(3) Revised 5.1.(4) Revised 5.2.1.(5) Revised 5.2.2.(6) Revised 5.3.1.(7) Revised 5.5.(8) Revised 9.4.2.(9) Revised 9.5.1.(10) Revised 9.5.2.(11) Revised 10.1.3.
49、(12) Revised the title of Section 11.(13) Revised 12.1.F2176 173ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised
