1、Designation: C1173 18Standard Specification forFlexible Transition Couplings for Underground PipingSystems1This standard is issued under the fixed designation C1173; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification describes the properties of devices orassemblies suitable for use as flexible transition couplings,herei
3、nafter referred to as “couplings,” for underground drain-age and sewer piping systems.1.2 Couplings that may include bushings, inserts, or shearrings and conform to the requirements of this standard aresuitable for joining plain-end pipe or fittings. The pipe to bejoined shall be of similar or dissi
4、milar materials, size, or both.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 information onlyand are not considered standard.1.4 The ASTM standards referenced herein shall be cons
5、id-ered mandatory.1.5 The committee with jurisdiction over this standard is notaware of another comparable standard for materials covered inthis standard.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Dec
6、ision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate,
7、 Sheet, and Strip for PressureVessels and for General ApplicationsA493 Specification for Stainless Steel Wire and Wire Rodsfor Cold Heading and Cold ForgingA644 Terminology Relating to Iron CastingsD395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcanized Rubber and Thermo
8、plas-tic ElastomersTensionD471 Test Method for Rubber PropertyEffect of LiquidsD543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD573 Test Method for RubberDeterioration in an AirOvenD624 Test Method for Tear Strength of Conventional Vul-canized Rubber and Thermoplastic Ela
9、stomersD638 Test Method for Tensile Properties of PlasticsD1149 Test Methods for Rubber DeteriorationCracking inan Ozone Controlled EnvironmentD2240 Test Method for Rubber PropertyDurometer Hard-nessD3045 Practice for Heat Aging of Plastics Without LoadD6147 Test Method for Vulcanized Rubber and The
10、rmoplas-tic ElastomerDetermination of Force Decay (StressRelaxation) in Compression3. Terminology3.1 DefinitionsFor definitions of terms used in thisstandard, see Terminology A644.3.2 Definitions of Terms Specific to This Standard:3.2.1 center stop, nan integral part of the gasket centeredon its axi
11、al length, intended to limit the insertion depth of thepipe to be coupled.3.2.2 clamp assembly, nthat portion of the coupling ex-cluding the gasket.3.2.3 coupling, nthe complete assembly.3.2.4 fitting, nparts of a pipeline other than straight pipecouplings or valves.3.2.5 flexible transition couplin
12、gs, ndevices used to forma leakproof joint between sections of plain-end pipe or fittingsof the same or different materials, of the same or different size,or any combination of materials or pipe sizes.3.2.6 free torque, nthe torque value expressed inlbfin./Nm when the clamp is tightened four revolut
13、ions of thescrew nut; while in the free state, this value does not include1This specification is under the jurisdiction of ASTM Committee A04 on IronCastings and is the direct responsibility of Subcommittee A04.75 on Gaskets andCoupling for Plumbing and Sewer Piping.Current edition approved Feb. 1,
14、2018. Published February 2018. Originallyapproved in 1991. Last previous edition approved in 2014 as C1173 10 (2014).DOI: 10.1520/C1173-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume
15、 information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standar
16、dization 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.1any breakaway effects due to staking or passage of the bandends beyond the screw heads.3.2.
17、7 inserts, na bushing or ring placed into the couplingsocket to accommodate pipe materials of differing outsidediameters.3.2.8 joint, nthe completed assembly of parts consistingof the flexible transition coupling and the joined pipes, orfittings, or both.3.2.9 lot, na specific quantity of similar ma
18、terial orcollection of similar units from a common source; the quantityoffered for inspection and acceptance at any one time. A lotmight comprise a shipment, batch, or similar quantity.3.2.10 manufacturer, nthe entity that produces the cou-pling.3.2.11 plain-end pipe, nany pipe that does not include
19、 anybell, hub, threaded area, or other means of joining.3.2.12 shear ring, nan interior or exterior element whichis used to span the distance between the pipe ends within acoupling so as to provide increased resistance to axial displace-ment.4. Classification4.1 The couplings shall be permitted to h
20、ave a center stop.The components shall be designed so that the elastomericmaterial is compressed to form a hydrostatic seal when thejoint is assembled. The couplings shall be of the typesdescribed in 4.1.1 4.1.3.4.1.1 Type AA coupling consisting of an elastomericgasket incorporating corrosion-resist
21、ant tension bands andtightening mechanism. Couplings shall be fabricated withoutshear rings, with or without inserts, and with or without acenter stop.4.1.2 Type BA coupling consisting of an elastomericgasket incorporating a corrosion-resistant shear ring, tensionbands, and tightening mechanism. Cou
22、plings shall be fabri-cated with shear rings, with or without inserts, and with orwithout a center stop (Note 1).4.1.3 Type CA coupling fabricated with elastomeric com-pression seals.NOTE 1The provisions of this standard are not intended to prevent theuse of any alternate material or method of const
23、ruction, provided any suchalternate meets the requirements of this standard.5. Materials and Manufacture5.1 Elastomeric materials used in the manufacturing ofcouplings and inserts shall comply with the requirements of10.1 and Table 1.5.2 All metallic components shall be manufactured of 300series sta
24、inless steel.6. Elastomeric Gasket Requirements6.1 The elastomeric gasket shall conform to the physicalproperties as specified in 5.1.6.2 Elastomeric gaskets and inserts of single, multi-piece, orspliced construction shall show no signs of separation, peeling,or other defects when tested in accordan
25、ce with Section 9.6.3 Elastomeric gaskets and inserts of single, multi-piece, orspliced construction shall be free from porosity and air pockets.Its surface shall be smooth and free from pitting, cracks,blisters, air marks, or any other imperfections that affect itsperformance in service. The flash
26、extension shall not exceed1 mm at any point where the presence of flash affects perfor-mance.6.4 Elastomeric gaskets and inserts shall be compatible withthe dimensions and tolerances of the specific material to whichit is designed to join.7. Clamp Assembly Requirements7.1 All metallic components sha
27、ll be of 300 series stainlesssteel conforming to the chemical composition requirements ofSpecification A240/A240M. All metallic components madefrom round stock shall be of 300 series stainless steel conform-ing to the requirements of Specification A493 (excludingcopper-bearing alloys).7.2 Clamp asse
28、mblies, tension bands, and tightening mecha-nisms shall conform to the performance requirements as setforth in 10.2.8. Dimensions8.1 Couplings and bushing dimensions shall be compatiblewith the dimensions and tolerances of the specific material towhich it is designed to join.9. Sampling, Tests, and
29、Retests9.1 Test specimens representative of the couplings to beused shall be randomly selected from the manufactured lot fortesting.9.2 One coupling for each size or type shall be tested, unlessotherwise specified or waived by the purchaser.TABLE 1 Test RequirementsPropertiesPhysicalRequirementsASTM
30、 TestMethodElastomeric materialsHardness, nominal shore “A” durometer asspecified by the coupling manufacturer5075 D2240Hardness, nominal shore “D” durometer asspecified by the coupling manufacturer3545 D2240Tensile strength, min psi (KPa) 1000 (6894) D412,DieC,Fig. 2 or D638Elongation at rupture, m
31、in, % 200 D412,DieC,Fig. 2 or D638Heat aging, 70 h, 158 3.6 F (70 2 C) D573 or D3045Hardness increase, maximum Durometerpoints10Change in tensile strength, max, % 25Change in elongation, max, % 35Ozone resistance no cracks D1149At 20 % elongationFor 100 h at 104 3.6 F (40 2 C)With 50 parts per 100 m
32、illionWater absorption, weight gain, %, max 20 D471Chemical resistance, 48 h, 74 3.6 F (23 2 C)no weight loss D543Compression set, max, % 25 D395 Method BStress relaxation, min. % force retention 30 D6147Tear strength, min, lbf/in. (N/cm) 150 (268.5) D624 Die CC1173 1829.3 Where there is a failure i
33、n the original test, the entire testshall be rerun with twice the number of samples and any failureshall be cause for rejection.10. Test Methods10.1 Elastomeric Materials:10.1.1 HardnessHardness shall be measured on either afinished surface, a squarely cut end, or a flat-sliced or buffedsurface, dep
34、ending on the size and shape of the specimen. SeeTest Method D2240. The manufacturer shall specify thehardness and scale.10.1.2 Tensile Strength and ElongationThe dumbbellsshall be prepared from sections of the finished material. SeeTest Methods D412.10.1.3 Heat AgingFor hardness, tensile and elonga
35、tionshall be performed in accordance with Test Method D573.Specimens shall be oven aged for 96 h at 158 6 3.6 F (70 62 C).10.1.4 Ozone ResistanceSee Test Methods D1149. Proce-dure A, stretched 20 % and exposed to an ozone concentrationof 50 parts per 100 million for 100 h at 104 6 3.6 F (40 62 C).10
36、.1.5 Water AbsorptionSize and time determinationsshall be set in accordance with Test Method D471. A specimen0.075 by 1 by 2 in. (1.9 by 25 by 50 mm) shall be immersed indistilled water at 158 6 3.6 F (70 6 2 C) for 7 days. After 7days the specimen shall be removed, the surface moistureblotted, and
37、the specimen weighed. The percent gain shall bedetermined by the following equation:WF 2 WO!WO100where:WF = weight of specimen after immersion for 7 days, andWO = dry weight of specimen before immersion.10.1.6 Chemical ResistanceSamples shall be aged for48hat746 3.6 F (23 6 2 C) using solutions of 1
38、N sulfuricacid and 1N hydrochloric acid. See Practices D543.10.1.7 Tear StrengthThe gasket material shall be tested inaccordance with Test Method D624, Die C.10.1.8 Compression Set/Stress RelaxationElastomericmaterials shall comply with the compression set requirementsof 10.1.8.1 or the stress relax
39、ation requirements of 10.1.8.2.10.1.8.1 The gasket material shall be tested for compressionset in accordance with Test Methods D395, Method B. Speci-mens shall be oven aged for 22 h at 70 6 1 C (158 6 2 F).10.1.8.2 The gasket material shall be tested for stressrelaxation in accordance with Test Meth
40、od D6147, usingMethod B and test specimen as defined in 7.1.2 of Test MethodD6147. The test temperature and duration shall be 168 h at 236 2 C (73 6 4 F).10.2 Clamp Assembly Performance:10.2.1 Torque ResistanceClamp assemblies, tensionbands, and tightening mechanisms shall be tested to withstandthe
41、manufacturers required installation torque or a minimumof 60 in.-lb (8.5 N-m) of applied torque without visible signs offailure. The band shall be tested over a steel mandrel of theappropriate coupling diameter and torqued as required.10.2.2 The maximum free-running torque of stainless steeltension
42、bands shall be 4 in.-lb (0.45 N-m). Stainless steeltension bands with torque resistance in excess of 100 in.-lbshall have a maximum free-running torque of 8 in.-lb.10.2.3 Test Procedure for Free-Running Torque:10.2.3.1 With the nonstressed clamp handheld and theslotted band fully engaged, the screw
43、shall be rotated clock-wise ten revolutions with the maximum value of the torquemeter recorded.10.2.3.2 The equipment required shall be a handheld torquemeter witha0to15in.-lb range.10.3 Coupling Performance Requirements:10.3.1 Deflection Sealing ResistanceThe joint shall havesufficient flexibility
44、to permit deflection in any direction asdefined by Table 2 and shall show no visible leakage when sodeflected while under an internal hydrostatic pressure of 4.3 psi(30 kPa) for a period of 15 min. The ends of the test pipe shallbe restrained only by an amount necessary to prevent longitu-dinal move
45、ment. The deflection shall be measured as thedistance the free end of the one pipe has moved away from thecenter line of the fixed pipe. See Fig. 1.10.3.1.1 Assemble each coupling tested in accordance withthe manufacturers instructions between two sections of ran-domly selected pipe, not to exceed 5
46、 ft in length, manufacturedto appropriate standards for the type of pipe the couplings areexpected to join.10.3.1.2 Support one pipe section on two blocks, one nearthe uncoupled end of the pipe section and the other blockimmediately adjacent to the coupling. Firmly restrain pipesection one.10.3.1.3
47、Deflect the second pipe section in any direction anamount equal to the distance specified in Table 2 of thisstandard. Firmly restrain pipe section two.10.3.1.4 Plug the outbound pipe ends. Fill the assemblywith water, expelling all air. Gradually apply the 4.3 psiinternal hydrostatic pressure and ma
48、intain for 15 min.10.3.2 Shear Loading Resistance (Type B CouplingsOnly)The joint shall have sufficient resistance to shearloading to meet the requirements of the following test.10.3.2.1 Support two joined lengths of randomly selectedpipe on blocks, a minimum of 112 in. (38.1 mm) high, at threelocat
49、ions. One length shall be a minimum of 24 in. (609.6 mm)in length, supported on blocks, one near the uncoupled end,and the other immediately adjacent to the coupling. Firmlyrestrain this length in position as shown in Fig. 2. The othercoupled length shall be a minimum of 5 ft (1.52 m) in lengthand supported by a single block 6 in. (152.4 mm) from the endof the pipe.TABLE 2 Requirements Deflection Per Foot of Pipe LengthANominal ID,in. (mm)Deflection in./linear ft(mm/linear m)2 12 (50 300)12 (42)15 24
