1、Designation: C1277 12Standard 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 Dec. 1, 2012. Published January 2013. Originallyapproved in 1994. Last previous edition approved in 2011 as C1277 11. DOI:10.1520/C1277-12.
14、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, refer to the standards Document Summary page onthe ASTM website.3Available from Cast Iron Soil Pipe Institute (CISPI), 5959 S
15、hallowford Rd.,Suite 419, Chattanooga, TN 37421, 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 me
16、thod of embossing.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
17、.2.8 manufacturer 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 pro
18、tective devicedesigned 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
19、as shown in Fig. 1, Fig. 2,Table 1, and Table 2.FIG. 1 Rubber GasketC1277 122NOTE 1Dimensions found in these drawings are for informational purposes only. The dimensions A and B found in the table are mandatory.Dimensions D1 and D2 found in the table are reference for mold design. Tolerances are fou
20、nd 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 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 3.0
21、00 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 Tolerances to be RMA Class 3 (See Table 1).FIG. 1 Rubber Gasket (continued)C1277 1234.2 Clamp assembly screws or bolts sh
22、all 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 poly-chloroprene (neoprene).5.2 The elastomeric gasket shall consist o
23、f 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 gasket being produced.These tests shall be performed at the manufac
24、turer locationduring the time of production. These tests shall includehardness, elongation and tensile strength, tear strength andNOTE 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
25、 shape and dimensions are to 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 GasketC
26、1277 124compression set. Heat aging, water absorption, ozoneresistance, and oil immersion tests shall be performed annuallyor when the formulation changes or sources of supply, which-ever occurs first.5.2.1 The elastomeric gasket shall have an inside center stopthat does not create an enlargement ch
27、amber or recess with aledge, shoulder, or reduction of pipe area or offer an obstruc-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 req
28、uirements as outlined in Section6, Table 3 and Fig. 3.6.1.1 All parts shall be of 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
29、 maximum and minimum ODs of pipe and fittings andinclude 2 stainless steel bands for 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 su
30、chother method that will insure that the bands will not becomeseparated from the shield. 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 manufact
31、urers stated installation torque or aminimum of 60 lbfin. (6.78 Nm) of applied torque, 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 performedrandomly on selected
32、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 couplings shall meet the dimensional require-ments of Fig. 3.7. Couplings Requirements and Test Methods7.1 As
33、semble 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 A888 and conduct the followingtest: deflection and shear. In addition, an unrestrained hydro-static test
34、 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 using first article selection not to exceed30 days. The deflection and shear tests shall be performed onran
35、domly 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 as the one shown in Fig. 5 issuggested. Other testing apparati that provide restraint to theassembly
36、 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 durationof the test. One pipe shall be rigidly supported and while theassembly is under pressure, raise the op
37、posite 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 selectedhubless cast iron soil pipe on blocks, a minimum of 112 in.(38.1 mm) high, at three locations. O
38、ne 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 positionas shown in Fig. 6. The other coupled length shall be aminimum of 5 ft (1.52 m) in length and support
39、ed 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 edge of the coupling upon a 12 in. (304.8 mm)length of (3 by 3) angle iron or load distribution pad l
40、ocated 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) from true alignment adjacent to the coupling, when aninternal pressure equivalent to a 10 ft (3.05 m)
41、head of water4.3 psi (29.6 kPa) is applied. Maintain the load and internalpressure for 15 min.7.1.3 Unrestrained Hydrostatic Test:7.1.3.1 Assemble each coupling tested according to themanufacturers instruction between two sections of machinedsteel pipe and conduct the thrust test.7.1.3.2 The assembl
42、y shall consist of a maximum outsidediameter pipe connected to a minimum outside diameter pipewith diameters as referenced in Table 4 and lengths as shownin Fig. 7. Machine the plain ends of the pipe to be used for thethrust test to the correct diameters. Plain ends shall have 0.015in. (0.38 mm) dee
43、p grooves machined circumferentially aroundthem at18 in. (3.18 mm) intervals down the pipe section for adistance equal to that covered by the elastomeric sleeve of thecoupling being tested. The tool used to machine the groovesshall have a 60 inclined angle and cut into the pipe from aperpendicular p
44、osition. The surface between the grooves shallbe a lathe turned surface of 125 RMS.TABLE 1 Dimensional Tolerances 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
45、 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. These are commercialtolerances. All diametral dimensions shall have a tolerance of +/ 1 %.C1277 1257.1.3.3 The plain ends of the pipe for the thrust test shall beuncoated and cleaned with
46、acetone and thoroughly dried beforeeach assembly.7.1.4 Test Method:7.1.4.1 Support the pipe assemblies in a manner that doesnot restrain joint movement as shown in Fig. 7.7.1.4.2 Fill the pipe assembly (as required in 7.1.3) withwater, expelling all air. Increase the hydrostatic pressure at arate of
47、 1 psi (6.9 kPa) every 30 s until the specified testpressure is reached. The specified test pressure shall be 20 psi(137.9 kPa) for 112 in. (38.1 mm) through 5 in. (127 mm), 18psi (124.1 kPa) for 6 in. (152.4 mm), 10 psi (68.9 kPa) for 8 in.(203.2 mm), and 6 psi (41.4 kPa) for 10 in. (254 mm) pipe,
48、12in. (305 mm), and 15 in. (380 mm). When the specified testpressure is reached, hold it for 5 min.Any leakage or axial jointmovement of more than 0.150 in. (3.81 mm) shall mean failure.8. Markings and Identification8.1 MarkingThe gasket shall be marked with raised let-ters. This marking shall consi
49、st of pipe size, country of origin,manufacturers identifying mark, and Specification C564. Suchmarking shall not exceed 0.02 in. in relief.8.2 The shield and clamp assembly shall be marked withindented letters. All marking shall be placed on the bandassemblies. Marking on the band shall consist of pipe size.Marking on the screw housing shall consist of couplingmanufacturers name or registered trademark with a nationalTABLE 2 Rubber Gasket Physical RequirementsNOTE 1Material: The sealing sleeve shall be made from an elastomeric com
