1、Designation: C 425 04 (Reapproved 2009)Standard 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
2、 year 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 ma
3、terials and test 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.NOTE 1Install pipe in accordance with Practice C12.1.2 The value
4、s 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.1.3 The following precautionary caveat pertains only to theTest Requirements portion, Section 7, o
5、f this 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. Re
6、ferenced Documents2.1 ASTM Standards:2A 167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and StripA 240/A 240M Specification for Chromium andChromium-Nickel Stainless Steel Plate, Sheet, and Stripfor Pressure Vessels and for General ApplicationsC12 Practice for I
7、nstalling Vitrified Clay Pipe LinesC 700 Specification for Vitrified Clay Pipe, Extra Strength,Standard Strength, and PerforatedC 896 Terminology Relating to Clay ProductsD 395 Test Methods for Rubber PropertyCompressionSetD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTension
8、D 471 Test Method for Rubber PropertyEffect of LiquidsD 518 Test Method for Rubber DeteriorationSurfaceCracking3D 543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD 573 Test Method for RubberDeterioration in an AirOvenD 583 Discontinued 1972; Methods of Test for WaterResist
9、ance of Textile Fabrics3D 1149 Test Methods for Rubber DeteriorationCrackingin an Ozone Controlled EnvironmentD 1566 Terminology Relating to RubberD 2240 Test Method for Rubber PropertyDurometerHardness3. Terminology3.1 DefinitionsTerms relating to plastics and rubber shallbe as defined in Terminolo
10、gies 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 Sealing elements shall be compressed between bearingsurfaces to assure watertight integrity as required in Section 7.4.2 Sealing elements shall
11、 either 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
12、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 test specimens fail to meet the chemicalresistance requirements, the manufacturer will be allowed aretest of two additional specimens, repr
13、esentative of the1This specification is under the jurisdiction of ASTM Committee C04 onVitrified Clay Pipe and is the direct responsibility of Subcommittee C04.20 onMethods of Test and Specifications.Current edition approved Oct. 1, 2009. Published October 2009. Originallyapproved in 1958. Last prev
14、ious edition approved in 2004 as C 425 04.2For 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.3Withdrawn. The las
15、t approved version of this historical standard is referencedon www.astm.org.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 jointingmaterial will be acceptable if all retest spe
16、cimens 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 evaluations of joint
17、 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.6.2 Specimen
18、s 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 meet the require
19、ments 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 shall not leak when tested in the straig
20、htposition 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 in any direct
21、ionwhile 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 ElementsNOTEExcept for the water absorption te
22、st (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 48hat236 2C1N sulfuric acid no weight loss1N hydrochloric acid no weight lossTensile strength 1500 psi (10.4 MPa)
23、 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-sealing element in distilled waterfor 7 days
24、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 7 days at 70 6 2C75 % min of original elon
25、gationTABLE 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 StandardChemical resistance: D 543 48hat236 2C1
26、N 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 22 h at 70 6 2CWater absorption 5 % max D 471
27、Immerse 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 0.5 ppm for 24 h at40 6 1CD 1149Accelerated oven
28、 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 (48hat23 6 2C)1 N sulfuric acid no weight loss1 N hydrochloric acid no weight lossC 425 04 (2009)2than
29、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 the joint.7.1.3 Joints shall not leak
30、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; couplings; deflection; joints; sealing ele
31、-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 purchase order, the producer is respon-si
32、ble 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 purchaser shall have the right to perform
33、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 and Marking for U.S. GovernmentProcureme
34、nt: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 lowest rates. Containers and packing sh
35、allcomply 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
36、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 standard. Users of this standard are expres
37、sly 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 reviewed every five years andif not revised,
38、 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 theresponsible technical committee, which you may at
39、tend. 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 Conshohocken, PA 19428-2959,United States.
40、 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)C 425 04 (2009)3
