1、Designation: C 425 04Standard Specification forCompression Joints for Vitrified Clay Pipe and Fittings1This standard is issued under the fixed designation C 425; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revi
2、sion. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 materials and test
3、requirementsfor compression joints for vitrified clay pipe and fittings. SeeSpecification C 700 for pipe specifications. The test require-ments are applicable to pipe joint assemblies prior to fieldinstallation of pipe.1.2 The values stated in inch-pound units are to be regardedas the standard. The
4、values given in parentheses are forinformation only.NOTE 1Install pipe in accordance with Practice C 12.1.3 The following precautionary caveat pertains only to theTest Requirements portion, Section 7, of this standard. Thisstandard does not purport to address all of the safety concerns,if any, assoc
5、iated 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. Referenced Documents2.1 ASTM Standards:2A 167 Specification for Stainless and Heat-ResistingChromium
6、-Nickel Steel Plate, Sheet, and StripA 240/A 240M Specification for Heat-Resisting Chromiumand Chromium-Nickel Stainless Steel Plate, Sheet, andStrip for Pressure VesselsC 12 Practice for Installing Vitrified Clay Pipe LinesC 700 Specification for Vitrified Clay Pipe, Extra Strength,Standard Strengt
7、h, and PerforatedC 896 Terminology Relating to Clay ProductsD 395 Test Methods for Rubber PropertyCompressionSetD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 471 Test Method for Rubber PropertyEffect of LiquidsD 518 Test Method for Rubber DeteriorationSurfaceCracking
8、D 543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD 573 Test Method for RubberDeterioration in an AirOvenD 883 Terminology Relating to PlasticsD 1149 Test Method for Rubber DeteriorationSurfaceOzone Cracking in a ChamberD 1566 Terminology Relating to RubberD 2240 Test Meth
9、od for Rubber PropertyDurometerHardness3. Terminology3.1 DefinitionsTerms relating to plastics and rubber shallbe as defined in Terminologies D 883 and D 1566, respectively.3.2 Terminology C 896 can be used for clarification ofterminology in this specification.4. Principles of Joint Design4.1 Sealin
10、g elements shall be compressed between bearingsurfaces to assure watertight integrity as required in Section 7.4.2 Sealing elements shall either be bonded to bearingsurfaces or be independent elements.5. Materials and Manufacture5.1 Rubber ring-sealing elements shall conform to therequirements of Ta
11、ble 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 the requirements ofTable 3.5.4 Metallic components shall be of corrosion-resistantmetal conforming to Specifications A 167 and A 240/A 240M.5.5 If any of the te
12、st specimens fail to meet the chemicalresistance requirements, the manufacturer will be allowed aretest of two additional specimens, representative of the1This specification is under the jurisdiction of ASTM Committee C04 onVitrified Clay Pipe and is the direct responsibility of Subcommittee C04.20
13、onMethods of Test and Specifications.Current edition approved April 1, 2004. Published May 2004. Originallyapproved in 1958. Last previous edition approved in 2002 as C 42502.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For
14、 Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.original material tested, for each one that failed. The jointingmateria
15、l will be acceptable if all 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 tempera
16、ture; andspecific evaluations 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 purcha
17、ser or his representative.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 J
18、oints7.1 Joints shall meet the requirements of 7.1.1 and 7.1.2 or7.1.1 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 sh
19、all not leak when tested in 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 a
20、way from the center line in 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 Elements
21、NOTEExcept for the water absorption test (Test Method D 471), the tests shall be run on specimens cut from rubber test slabs representative of thefinished product.Test Test Requirement ASTM StandardChemical resistance: D 543 48 h at 23 6 2C1N sulfuric acid no weight loss1N hydrochloric acid no weigh
22、t lossTensile strength 1500 psi (10.4 MPa) min; 500 % min elongation at break D 412Hardness Shore A durometer 35 min to 50 max D 2240Compression set 16 % max of original deflection D 395, Method B 22 h at 70 6 2C Water absorption 5 % max D 471Immerse a 2-in. (51-mm) long section cutfrom a rubber-sea
23、ling element in distilled waterfor 7 days at 70 6 2COzone resistance no visible cracking under 23 specimen magnification us-ing D 518, Procedure B, stretched 20 % and exposedto ozone concentrations of 0.5 ppm for 24 h at 40 61CD 1149Accelerated oven aging 80 % min of original tensile strength D 573
24、7 days at 70 6 2C75 % min of original elongationTABLE 2 Tests for RubberOther than Ring-Sealing ElementsNOTEExcept for the water absorption test (Test Method D 471), the tests shall be run on specimens cut from rubber test slabs representative of thefinished product.Test Test Requirements ASTM Stand
25、ardChemical resistance: D 543 48 h at 23 6 2C1N sulfuric acid no weight loss1N hydrochloric acid no weight lossTensile strength 1000 psi (6.9 MPa) min; 250 % min elongation at break D 412Hardness Shore A durometer 55 min to 70 max D 2240Compression set 20 % max of original deflection D 395, Method B
26、 22 h at 70 6 2CWater absorption 5 % max D 471Immerse a 2-in. (51-mm) long section cutfrom a rubber coupling in distilled water for 7days at 70 6 2COzone resistance no visible cracking under 23 specimen magnification,using D 518, Procedure B, stretched 20 % and ex-posed to ozone concentrations of 0.
27、5 ppm for 24 h at40 6 1CD 1149Accelerated oven aging 85 % min of original tensile strength D 573 7 days at 70 6 2C85 % min of original elongationTABLE 3 Tests for Plastic MaterialsTest Test Requirements ASTM StandardChemical resistance: D 543 (48 h at23 6 2C)1 N sulfuric acid no weight loss1 N hydro
28、chloric acid no weight lossC425042than 120 (2.1 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
29、 the joint.7.1.3 Joints shall not leak when the 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; cou
30、plings; deflection; joints; sealing ele-ments; 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 pu
31、rchase order, the producer is respon-sible for 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 pur
32、chaser shall have the right to perform anyof the 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 a
33、nd Marking for U.S. GovernmentProcurement:S2.1 PackagingUnless otherwise specified in the con-tract, the materials shall be packaged in accordance with thesuppliers standard practice in a manner ensuring arrival atdestination in satisfactory condition and which will be accept-able to the carrier at
34、lowest rates. Containers and packing shallcomply 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
35、. Government procurement require-ments should not 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 stan
36、dard. 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 revie
37、wed every five years andif not revised, either 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 theresponsibl
38、e technical committee, which you may attend. If 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 Con
39、shohocken, PA 19428-2959,United States. Individual 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).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)C425043
