1、Designation: C425 04 (Reapproved 2013)Standard Specification forCompression Joints for Vitrified Clay Pipe and Fittings1This standard is issued under the fixed designation C425; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
2、ear 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers mate
3、rials and test requirementsfor compression joints for vitrified clay pipe and fittings. SeeSpecification C700 for pipe specifications. The test require-ments are applicable to pipe joint assemblies prior to fieldinstallation of pipe.NOTE 1Install pipe in accordance with Practice C12.1.2 The values s
4、tated 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.1.3 The following precautionary caveat pertains only to theTest Requirements portion, Section 7, of t
5、his standard.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 and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Refere
6、nced Documents2.1 ASTM Standards:2A167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and StripA240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for PressureVessels and for General ApplicationsC12 Practice for Install
7、ing Vitrified Clay Pipe LinesC700 Specification for Vitrified Clay Pipe, Extra Strength,Standard Strength, and PerforatedC896 Terminology Relating to Clay ProductsD395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD471 Test
8、 Method for Rubber PropertyEffect of LiquidsD518 Test Method for Rubber DeteriorationSurfaceCracking (Withdrawn 2007)3D543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD573 Test Method for RubberDeterioration in an AirOvenD583 Methods of Test for Water Resistance of Textile
9、Fabrics (Withdrawn 1971)3D1149 Test Methods for Rubber DeteriorationCracking inan Ozone Controlled EnvironmentD1566 Terminology Relating to RubberD2240 Test Method for Rubber PropertyDurometer Hard-ness3. Terminology3.1 DefinitionsTerms relating to plastics and rubber shallbe as defined in Terminolo
10、gies D583 and D1566, respectively.3.2 Terminology C896 can be used for clarification ofterminology in this specification.4. Principles of Joint Design4.1 Sealing elements shall be compressed between bearingsurfaces to assure watertight integrity as required in Section 7.4.2 Sealing elements shall ei
11、ther be bonded to bearingsurfaces or be independent elements.5. Materials and Manufacture5.1 Rubber ring-sealing elements shall conform to therequirements of Table 1.5.2 Rubber for other than ring-sealing elements shall con-form to the requirements of Table 2.5.3 Plastic components shall conform to
12、the requirements ofTable 3.5.4 Metallic components shall be of corrosion-resistantmetal conforming to Specifications A167 and A240/A240M.1This specification is under the jurisdiction of ASTM Committee C04 onVitrified Clay Pipe and is the direct responsibility of Subcommittee C04.20 onMethods of Test
13、 and Specifications.Current edition approved Dec. 1, 2013. Published December 2013. Originallyapproved in 1958. Last previous edition approved in 2009 as C425 04(2009). DOI:10.1520/C0425-04R13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at se
14、rviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken,
15、 PA 19428-2959. United States15.5 If any of the test specimens fail to meet the chemicalresistance requirements, the manufacturer will be allowed aretest of two additional specimens, representative of theoriginal material tested, for each one that failed. The jointingmaterial will be acceptable if a
16、ll retest specimens meet the testrequirements.5.6 Joints complying with this standard are suitable for mostdomestic and commercial applications. However, attention iscalled to the fact that industrial effluents vary in content,concentration, duration of discharge and temperature; andspecific evaluat
17、ions of joint performance in such environmentsare necessary. In those instances, consult the manufacturer.6. Joint Specimen Preparation6.1 When required, assembled joints representative of thepipe and joints to be used, shall be selected from the suppliersstock by the purchaser or his representative
18、.6.2 Specimens selected for the test shall be up to 0.25 % ofthe number of joints to be furnished. No fewer than twoassembled joints shall be tested for each diameter of pipefurnished.6.3 Test specimens shall not be taken from damaged jointsor pipe.7. Test Requirements for Joints7.1 Joints shall mee
19、t the requirements of 7.1.1 and 7.1.2or7.1.1 and 7.1.3, when subjected to an internal 10-ft (3.1-m)head of water pressure (4.3 psi (30 kPa), for a total test periodof 1 h. The recommended temperature of the water, pipe, andatmosphere is 60 to 75F (16 to 24C).7.1.1 Joints shall not leak when tested i
20、n the straightposition and when deflected to amounts shown in Table 4. Theends of the test line shall only be restrained the amount that isnecessary to prevent longitudinal movement. The deflectionshall be determined by measuring the distance the free end ofone pipe moves away from the center line i
21、n any directionwhile the other pipe remains fixed.7.1.2 Assembled joints shall not leak when subjected toshear. The shear load shall be a force of 150 lbf/in. (26 kN/m)of nominal diameter uniformly applied over an arc of not lessTABLE 1 Tests for RubberRing-Sealing ElementsNOTE 1Except for the water
22、 absorption test (Test Method D471), the tests shall be run on specimens cut from rubber test slabs representative of thefinished product.Test Test Requirement ASTM StandardChemical resistance: D543 (48 h at 23 2C)1N sulfuric acid no weight loss1N hydrochloric acid no weight lossTensile strength 150
23、0 psi (10.4 MPa) min; 500 % min elongation at break D412Hardness Shore A durometer 35 min to 50 max D2240Compression set 16 % max of original deflection D395, Method B (22 h at 70 2C)Water absorption 5 % max D471Immerse a 2-in. (51-mm) long section cutfrom a rubber-sealing element in distilled water
24、for 7 days at 70 2COzone resistance no visible cracking under 2 specimen magnification us-ing D518, Procedure B, stretched 20 % and exposedto ozone concentrations of 0.5 ppm for 24 h at 40 1CD1149Accelerated oven aging 80 % min of original tensile strength D573 (7 days at 70 2C)75 % min of original
25、elongationTABLE 2 Tests for RubberOther than Ring-Sealing ElementsNOTE 1Except for the water absorption test (Test Method D471), the tests shall be run on specimens cut from rubber test slabs representative of thefinished product.Test Test Requirements ASTM StandardChemical resistance: D543 (48 h at
26、 23 2C)1N sulfuric acid no weight loss1N hydrochloric acid no weight lossTensile strength 1000 psi (6.9 MPa) min; 250 % min elongation at break D412Hardness Shore A durometer 55 min to 70 max D2240Compression set 20 % max of original deflection D395, Method B (22 h at 70 2C)Water absorption 5 % max
27、D471Immerse a 2-in. (51-mm) long section cutfrom a rubber coupling in distilled water for 7days at 70 2COzone resistance no visible cracking under 2 specimen magnification, us-ing D518, Procedure B, stretched 20 % and exposedto ozone concentrations of 0.5 ppm for 24 h at 40 1CD1149Accelerated oven a
28、ging 85 % min of original tensile strength D573 (7 days at 70 2C)85 % min of original elongationTABLE 3 Tests for Plastic MaterialsTest Test Requirements ASTM StandardChemical resistance: D543 (48hat232C)1 N sulfuric acid no weight loss1 N hydrochloric acid no weight lossC425 04 (2013)2than 120 (2.1
29、 rad) along a longitudinal distance of not morethan 12 in. (305 mm) at the spigot end of one pipe. The load isapplied immediately adjacent to the assembled joint with theother pipe adequately secured and supported on blocks placedimmediately adjacent to the joint.7.1.3 Joints shall not leak when the
30、 jointed ends are dis-placed relative to one another in any direction perpendicular tothe pipe axis a distance of 0.04 in./in. (0.04 mm/mm) of pipediameter.8. Keywords8.1 bell; chemical resistance; clay pipe; compression joints;corrosion resistance; couplings; deflection; joints; sealing ele-ments;
31、shear; testingSUPPLEMENTARY REQUIREMENTSThese requirements apply only to Federal/Military procurement, not domestic sales or transfers.S1. Government/Military ProcurementS1.1 Responsibility for InspectionUnless otherwise speci-fied in the contract or purchase order, the producer is respon-sible for
32、the performance of all inspection and test require-ments specified herein. The producer may use his own or anyother suitable facilities for the performance of the inspectionand test requirements specified herein, unless the purchaserdisapproves. The purchaser shall have the right to perform anyof th
33、e inspections and tests set forth in this specification wheresuch inspections are deemed necessary to ensure that materialconforms to prescribed requirements.NOTE S1.1In U.S. Federal contracts, the contractor is responsible forinspection.S2. Packaging and Marking for U.S. Government Procure-ment:S2.
34、1 PackagingUnless otherwise specified in thecontract, the materials shall be packaged in accordance withthe suppliers standard practice in a manner ensuring arrival atdestination in satisfactory condition and which will be accept-able to the carrier at lowest rates. Containers and packing shallcompl
35、y with Uniform Freight Classification rules or NationalMotor Freight Classification rules.S2.2 MarkingMarking for shipment shall be in accordancewith Fed. Std. No. 123 for civil agencies and MIL-STD-129 formilitary agencies.NOTE S2.1The inclusion of U.S. Government procurement require-ments should n
36、ot be construed as an indication that the U.S Governmentuses or endorses the products described in this document.ASTM 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 advi
37、sed 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, either
38、reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If
39、 you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individ
40、ual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 4 DeflectionNominal Diameter, in. (mm)Deflection of Pipe, in./linearft (mm/linear m)3 to 12 (76 to 305), incl12 (42)15 to 24 (380 to 610), incl38 (31)27 to 36 (685 to 915), incl14 (21)39 and 42 (990 and 1065)316 (16)48 (1220)18 (10)C425 04 (2013)3
