1、Designation: C1277 15Standard Specification forShielded Couplings Joining Hubless Cast Iron Soil Pipe andFittings1This standard is issued under the fixed designation C1277; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f 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. Scope1.1 This specification covers the materials and testing ofshielded hubless couplings to join hubless cast iron soil pipe
3、and fittings.1.2 Several different types of hubless couplings are avail-able for use in hubless cast iron sanitary and storm drain, wasteand vent piping applications to connect hubless cast iron soilpipe and fittings by using a sleeve-type, or some other typecoupling device. It is the purpose of thi
4、s specification to furnishinformation as to the characteristics of one such sleeve typecouplings when applied to cast iron soil pipe and fittingsmanufactured in accordance with Specification A888, latestrevision, and CISPI-301, latest revision.1.3 The values stated in inch-pound units are to be rega
5、rdedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 The committee with jurisdiction over this standard isaware of other comparable standard published by the Cast IronSoil Pipe Institute, CI
6、SPI-310, FM 1680 published by FactoryMutual, and Specification C1540 published by ASTM.1.5 The following precautionary caveat pertains only to thetest method portion, Section 7, of this specification. Thisstandard does not purport to address all of the safety concerns,if any, associated with its use
7、. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plat
8、e, Sheet, and Strip for PressureVessels and for General ApplicationsA644 Terminology Relating to Iron CastingsA888 Specification for Hubless Cast Iron Soil Pipe andFittings for Sanitary and Storm Drain, Waste, and VentPiping ApplicationsC564 Specification for Rubber Gaskets for Cast Iron SoilPipe an
9、d FittingsC1540 Specification for Heavy Duty Shielded CouplingsJoining Hubless Cast Iron Soil Pipe and FittingsD3677 Test Methods for RubberIdentification by InfraredSpectrophotometry2.2 CISPI Standard:CISPI-301 Specification for Hubless Cast Iron Soil Pipe andFittings for Sanitary and Storm Drain,
10、Waste and VentPiping Applications3CISPI-310 Specification for Couplings for Use in Connec-tion with Hubless Cast Iron Soil Pipe and Fittings forSanitary and Storm Drain, Waste, and Vent Piping Appli-cations32.3 Factory Mutual Standard:FM 1680 Couplings Used in Hubless Cast Iron Systems forDrain, Was
11、te or Vent, Sewer, Rainwater or Storm WaterSystem, Above or Below Ground, Industrial, Commercialand Residential43. Terminology3.1 Definitions of the following terms used in this specifi-cation are found in Terminology A644, elastomeric and durom-eter.3.2 Definitions of Terms Specific to This Standar
12、d:3.2.1 center stop, nan integral part of the gasket centeredon the axial length of the gasket intended to limit the insertiondepth of the pipe to be coupled.3.2.2 clamp assembly, nthat portion of the coupling ex-cluding the gasket and shield.1This specification is under the jurisdiction of ASTM Com
13、mittee A04 on IronCastings and is the direct responsibility of Subcommittee A04.75 on Gaskets andCoupling for Plumbing and Sewer Piping.Current edition approved May 1, 2015. Published June 2015. Originallyapproved in 1994. Last previous edition approved in 2014 as C1277 14. DOI:10.1520/C1277-15.2For
14、 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 Cast Iron Soil Pipe Institute (CISPI), 2401 Field
15、crest Dr.,Mundelein, IL 60060, http:/www.cispi.org.4Available from Factory Mutual Research, 1151 Boston-Providence Turnpike,Norwood, MA, 02062.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.3 corrugated, nany method of embossing.
16、3.2.4 coupling, nthe complete assembly.3.2.5 fitting, nparts of a pipeline other than straight pipes,valves, or couplings.3.2.6 gasket, nthe elastomeric portion of the coupling.3.2.7 joint, nthe point of assembly consisting of thecoupling and the joined pipes or fittings, or both.3.2.8 manufacturer
17、clamp assembly and shield, nTheentity that attaches the clamp assembly to the shield for thecouplings covered by this standard specification.3.2.9 manufacturer gaskets, nThe entity that molds thegaskets covered by this standard specification.3.2.10 shield, nan external metallic protective devicedesi
18、gned to protect the sealing gasket from external elementsthat could cause failure of the sealing gasket.4. Materials and Manufacture4.1 Physical properties of gaskets shall comply with Speci-fication C564 and the dimensions, material specifications,physical and chemical properties as shown in Fig. 1
19、, Fig. 2,Table 1, and Table 2.4.2 Clamp assembly screws or bolts shall not have screw-driver slots.5. Elastomeric Gasket Requirements5.1 The gaskets shall be tested in accordance with TestMethods D3677 and be manufactured from a properly vulca-nized virgin compound where the primary elastomer is pol
20、y-chloroprene (neoprene).5.2 The elastomeric gasket shall consist of one piece con-forming to the physical requirements of Specification C564.The gaskets shall be tested by the gasket manufacturer forcompliance to Specification C564 during each day of produc-tion not to exceed 24 h for each size of
21、gasket being produced.These tests shall be performed at the manufacturer locationduring the time of production. These tests shall includehardness, elongation and tensile strength, tear strength andcompression set. Heat aging, water absorption, ozoneresistance, and oil immersion tests shall be perfor
22、med annuallyor when the formulation changes or sources of supply, which-ever occurs first.FIG. 1 Rubber GasketC1277 1525.2.1 The elastomeric gasket shall have an inside center stopthat does not create an enlargement chamber or recess with aledge, shoulder, or reduction of pipe area or offer an obstr
23、uc-tion to flow.5.2.2 The elastomeric gasket shall be free of defects thataffect the use and serviceability.6. Clamp Assembly Requirements6.1 The shield and clamp assembly shall be made ofmaterial conforming to the requirements as outlined in Section6, Table 3 and Fig. 3.6.1.1 All parts shall be of
24、300 series stainless steel. All partsmade from round stock shall be of 300 series stainless steel(excluding copper bearing alloys). The shield shall be corru-gated or otherwise provided with a mechanism to accommo-date maximum and minimum ODs of pipe and fittings andinclude 2 stainless steel bands f
25、or sizes 112 to 4 in. and 4 bandsfor 5 to 10 in. and 6 bands for 12 and 15 in. Each tighteningdevice housing shall interlock with a band at the unslotted end.The bands are to be fastened to the shield by riveting or suchother method that will insure that the bands will not becomeseparated from the s
26、hield. The shield and clamp assembly shallcomply with dimensions and material specifications, as aregiven in Table 3, Fig. 3, and Fig. 4.6.1.2 Clamp assemblies shall be tested to withstand no lessthan 125 % of manufacturers stated installation torque or aminimum of 60 lbfin. (6.78 Nm) of applied tor
27、que, whicheveris greater, without visible signs of failure. The clamp assemblyshall be tested over a steel mandrel of the appropriate diameterand torqued as required. These tests shall be performedNOTE 1Dimensions found in these drawings are for informational purposes only. The dimensions A and B fo
28、und in the table are mandatory.Dimensions D1 and D2 found in the table are reference for mold design. Tolerances are found in Fig. 2. The center stop width is (3/32) .094 plus the5 draft angle. Sealing ring shape and dimensions are to manufacturers design.Dimensions112 in. 2 in. 3 in. 4 in. 5 in. 6
29、in. 8 in. 10 in. 12 in. 15 in.A 1.062 1.062 1.062 1.062 1.500 1.500 2.000 2.000 2.750 2.750B 2.125 2.125 2.125 2.125 3.000 3.000 4.000 4.000 5.500 5.500D1 1.531 1.968 2.968 4.000 4.968 5.968 7.968 9.975 12.000 15.200D2 1.937 2.343 3.343 4.406 5.343 6.343 8.343 10.350 12.430 15.650NOTE 2Dimensional T
30、olerances to be RMA Class 3 (See Table 1).FIG. 1 Rubber Gasket (continued)C1277 153randomly on selected samples during the course of productionas needed but not less than one clamp per shift per size duringband production.6.1.3 The clamped shield shall meet the requirements ofTable 3.6.1.4 The coupl
31、ings shall meet the dimensional require-ments of Fig. 3.7. Couplings Requirements and Test Methods7.1 Assemble each coupling tested according to the manu-facturers instructions between two sections of randomlyselected hubless cast iron soil pipe meeting the requirements ofCISPI-301 or Specification
32、A888 and conduct the followingtest: deflection and shear. In addition, an unrestrained hydro-static test will be performed between two sections of machinedsteel pipe. The unrestrained hydrostatic tests shall be per-formed on randomly selected couplings of each size during thecourse of production usi
33、ng first article selection not to exceed30 days. The deflection and shear tests shall be performed onNOTE 1Dimensions found in these drawings are for informational purposes only. The dimensions found in the table are mandatory. Tolerances arefound in Fig. 2. Sealing ring shape and dimensions are to
34、manufacturers design.Dimensions for Reducing Sleeves21-12 32 43A 1.062 1.062 1.062B 2.125 2.125 2.125C 0.297 0.594 0.625D1 1.531 1.968 2.968D2 1.937 2.343 3.343D3 2.343 3.343 4.406NOTE 2Dimensional Tolerances to be RMA Class 3 (See Table 1).FIG. 2 Reducing Rubber GasketTABLE 1 Dimensional Tolerances
35、 for RubberStandardDimensional Tolerances RMA CLASS 3Size, in. Fixed, Closure, 0 to 0.499 0.010 0.0150.500 to 0.999 0.010 0.0181.000 to 1.999 0.015 0.0202.000 to 2.999 0.020 0.0253.000 to 3.999 0.025 0.0304.000 to 4.999 0.030 0.0355.000 to 7.999 0.035 0.050NOTE 18.000 and overmultiplied by 0.0050. T
36、hese are commercialtolerances. All diametral dimensions shall have a tolerance of +/ 1 %.C1277 154randomly selected couplings of each size during productionwhenever a change of design occurs or not to exceed 120 days,whichever is the shorter period.7.1.1 Deflection Test:7.1.1.1 A test apparatus such
37、 as the one shown in Fig. 5 issuggested. Other testing apparati that provide restraint to theassembly shall also be permitted. Close the outboard ends ofthe pipe with test plugs.7.1.1.2 Fill the assembly with water, expel all air, andhydrostatically pressurize to 4.3 psi (29.6 kPa) for the durationo
38、f the test. One pipe shall be rigidly supported and while theassembly is under pressure, raise the opposite end of the otherpipe12 in. (12.7 mm) per lineal foot of pipe. Maintain thepressure for 5 min. Any leakage shall mean failure.7.1.2 Shear Test:7.1.2.1 Support two joined lengths of randomly sel
39、ectedhubless cast iron soil pipe on blocks, a minimum of 112 in.(38.1 mm) high, at three locations. One length shall be aminimum of 24 in. (609.6 mm) in length, supported on blocks,one near the uncoupled end, and the other immediatelyadjacent to the couplings. Firmly restrain this length in position
40、as shown in Fig. 6. The other coupled length shall be aminimum of 5 ft (1.52 m) in length and supported by a singleblock 6 in. (152.4 mm) from the end of the pipe.7.1.2.2 Fill the assembly with water and expel all air. Applya load of 50 lb/in. of nominal diameter at a point 6 in. (152.4mm) from the
41、edge of the coupling upon a 12 in. (304.8 mm)length of (3 by 3) angle iron or load distribution pad located onthe top of the pipe immediately adjacent to the coupling of thepipe having one support only. Under this loading there shall beno visible leakage or displacement of more than38 in. (9.53mm) f
42、rom true alignment adjacent to the coupling, when aninternal pressure equivalent to a 10 ft (3.05 m) head of water4.3 psi (29.6 kPa) is applied. Maintain the load and internalpressure for 15 min.7.1.3 Unrestrained Hydrostatic Test:TABLE 2 Rubber Gasket Physical RequirementsNOTE 1Material: The sealin
43、g sleeve shall be made from an elastomeric compound that meets the requirements of Specification C564.NOTE 2Physical Tests: The test specimens shall be obtained from finished sleeves and tested pursuant to the methods described in the following table.TestPhysical Tests,Min or Max RequirementsASTMMet
44、hodTensile Strength 1500 psi min D412Elongation 250 min D412Durometer (Shore A) 705at765F D2240Accelerated Aging 15 % max tensile and 20 % max elongation deterioration, 10 pointsmax; increase in hardness, all determinations after oven aging for96 h at 158FD573Compression Set 25 % max after 22 h at 1
45、58F D395 Method BOil Immersion 80 % max. volume change after immersion in ASTM oil no. IRM903for 70 h at 212FD471Ozone Cracking No visible cracking at 2 times magnification of the gasket after 100 h.Exposure in 1.0 ppm ozone concentration at 100F. Testing and in-spection to be on gasket which is loo
46、p mounted to give approxi-mately 20 % elongation of outer surfaceD1149Tear Resistance Die C; 150 lb min per inch of thickness D624Water Absorption 20 % max by weight after 7 days at 158F D471TABLE 3 Material SpecificationsBand Type 301 AISI Stainless SteelMinimum Tensile 140 000 psi for 112 to 15in.
47、; Type 304 AISI Stainless Steel is permittedType 304 AISI Stainless SteelMinimum Tensile 140 000 psiEyelets/Rivets Type 300 grade AISI Stainless SteelScrew Housing Type 301 AISI Stainless Steel for 112 to 15 in.; Type 304 AISI StainlessSteel is permittedScrew Type 305 AISI and or Type 304L Annealed
48、Stainless Steel516 Hex Head/Shoulder for 112 to 10 in.;38 Hex Head/Shoulder for 12 and 15 in. isrequired for couplings which require installed torque greater than 60 in.-lbfWhen other than38 in. hex head screw is used on 12 and 15 in. couplings,the coupling shall be labeled with the required install
49、ation torqueShield Type 301 AISI and or Type 304 AISI Stainless SteelBright Annealed Only(Annealed and Pickled Not Acceptable)HardnessRockwell B-100 (Vickers 240) per A240/A240M Max (Max BurrHeight Not to Exceed 25 % of Thickness)(1) Construction for sizes 112 thru 10 in. shields have corrugations tapering in height from 0.000 to 0.030 in. at dimension “Y.” Y equals maximum of 1 in. (TypeAOnly)(2) Position clamps on shield as shown from inside end of clamp. Shield overlap to be as shown or reversed on 5, 6, 8, 10, 12,
