1、Designation: A716 18Standard Specification forDuctile Iron Culvert Pipe1This standard is issued under the fixed designation A716; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses in
2、dicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers 14 to 64-in. ductile iron culvertpipe, centrifugally cast.1.2 The values stated in inch-pound units are to be regardedas standard. Th
3、e values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The following safety hazards caveat pertains only to thetest methods portions, Sections 6 and 7, of this specification:This standard does not purport to add
4、ress all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety,health, and environmental practices and determine the appli-cability of regulatory limitations prior to use.1.4 This international standard was develo
5、ped in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Docum
6、ents2.1 ASTM Standards:2E8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE23 Test Methods for Notched Bar Impact Testing of Me-tallic Materials2.2 ANSI/AWWA Standards:3,4C150/A21.50 Thickness Design of Ductile-Iron PipeC151/A21.51 Ductile-Iron Pipe Centrifugally Cast2.3 AASHTO Standard:
7、5AASHTO T-99 Moisture Density Relations of Soils Using a5.5-lb (2.5-kg) Rammer 12-in. (305-mm) Drop3. General Requirements3.1 The pipe shall be manufactured of ductile iron thatmeets the requirements of Sections 6 and 7. See Table 1 forpipe thicknesses and weights; see also Fig. 1.3.2 The pipe shall
8、 be provided with suitable joints, such aspush-on or other types of joints that prevent lateral displace-ment. Plain-end pipe for use with suitable couplings may befurnished.3.3 Unless otherwise specified, pipe shall have a nominallength of 18 or 20 ft (5.5 or 6.1 m).Amaximum of 20 % of thetotal num
9、ber of pipe of each size specified in an order may befurnished as much as 24 in. (610 mm) shorter than the nominallaying length, and an additional 10 % may be furnished asmuch as in 6 in. (152 mm) shorter than the nominal layinglength.4. Tolerances or Permitted Variations4.1 DimensionsThe spigot end
10、, bell, and socket of thepipe and the accessories shall be gaged with suitable gages atsufficiently frequent intervals to ensure that the dimensionscomply with the requirements of this specification. The small-est inside diameter (ID) of the sockets and the outside diameter(OD) of the spigot ends sh
11、all be tested with circular gages.Other socket dimensions shall be gauged as may be appropri-ate.4.2 ThicknessMinus thickness tolerances of pipe shall notexceed those shown below:Nominal Size, in. Minus Tolerance, in. (mm)14 to 42 0.07 (1.8)48 0.08 (2.0)54 to 64 0.09 (2.3)NOTE 1An additional minus t
12、olerance of 0.02 in. (0.05 mm) shall bepermitted along the barrel of the pipe for a distance not to exceed 12 in.(305 mm).1This specification is under the jurisdiction of ASTM Committee A04 on IronCastings and is the direct responsibility of Subcommittee A04.12 on Pipes andTubes.Current edition appr
13、oved Nov. 1, 2018. Published December 2018. Originallyapproved in 1975. Last previous edition approved in 2014 as A716 08 (2014).DOI: 10.1520/A0716-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStan
14、dards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from American Water Works Association (AWWA), 6666 W. QuincyAve., Denver
15、, CO 80235, http:/www.awwa.org.5Available from American Association of State Highway and TransportationOfficials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,http:/www.transportation.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1942
16、8-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Techni
17、cal Barriers to Trade (TBT) Committee.15. Coating5.1 All pipe shall be coated inside and outside with anasphaltic or equivalent material approximately 1 mil(0.025 mm) thick. The finished coating shall be continuous andsmooth, neither brittle when cold nor sticky when exposed tothe sun, and shall be
18、strongly adherent to the pipe.6. Acceptance Tests6.1 The standard acceptance tests for the physical charac-teristics of the pipe shall be as follows:6.2 Tension TestUnless otherwise specified by thepurchaser, a tension test specimen shall be cut longitudinally orcircumferentially from the midsection
19、 of the pipe wall. In caseof dispute, the specimen shall be cut longitudinally. Thisspecimen shall be machined and tested in accordance with Fig.2 and Test Methods E8/E8M. The yield strength shall bedetermined by the 0.2 % offset, halt-of-pointer, or extension-under-load method. If check tests are t
20、o be made, the 0.2 %offset method with a maximum crosshead speed of 0.10 in./min(2.5 mm/min) shall be used. All specimens shall be tested atroom temperature 70 6 10 F (21 6 6 C).6.2.1 Acceptable ValuesThe acceptance values for testspecimens shall be as follows:Grade of iron 60-42-10Minimum tensile s
21、trength, psi (MPa) 60 000 (413.7)Minimum yield strength, psi (MPa) 42 000 (289.6)Minimum elongation, % 106.3 Charpy Impact TestTests shall be made in accordancewith Test Methods E23, except that dimensions of the speci-mens shall be 0.500 in. (12.70 mm) by full thickness of pipewall. Unless otherwis
22、e specified by the purchaser, the Charpynotched impact test specimen shall be in accordance with Fig.3, except that it may be cut circumferentially. In case ofdispute, the specimen shall be cut in accordance with Fig. 3.Ifthe pipe wall thickness exceeds 0.40 in. (10.2 mm), the Charpyimpact specimen
23、may be machined to a nominal thickness of0.40 in. (10.2 mm). In all tests, impact values are to becorrected to a standard wall thickness, ts= 0.40 in. (10.2 mm),by calculation as follows:Impact value corrected! 5tst3impact value actual!where:t = the thickness of the specimen, in. (mm).The Charpy imp
24、act test machine anvil shall not be moved tocompensate for the variation of cross-section dimensions of thetest specimen.6.3.1 Acceptance ValueThe corrected acceptance valuefor notched impact test specimens shall be a minimum of7 ftlbf (9.49 J) for tests conducted at 70 6 10 F (21 6 6 C).6.4 Samplin
25、gAt least one tension specimen shall be takenduring each casting period of approximately 3 h. At least one70 6 10 F (21 6 6 C) Charpy impact specimen shall betaken during each operating hour. Specimens shall be selectedto properly represent extremes of pipe diameters and wallthicknesses.7. Additiona
26、l Control Tests by Manufacturer7.1 An additional low-temperature impact test shall be madefrom at least 10 % of the sample coupons taken for the required70 6 10 F (21 6 6 C) Charpy impact test specified in 6.4 tocheck compliance with a minimum corrected value of 3 ftlbf(4.07 J) for tests conducted a
27、t 40 F 6 2 F (40 C 6 1 C).Test specimens shall be prepared and tested in accordance with6.3.7.2 In addition, the manufacturer shall conduct such othertests as may be necessary to ensure compliance with thisspecification.TABLE 1 Standard Wall ThicknessAand Weight of Push-On JointDuctile Iron Culvert
28、PipeNominalDiam., in.PressureClassNominalThickness,in. (mm)MaximumDepth ofCover, ft(m)18-ft (5.5-mm)Laying Length,Weight per,Length, lb (kg)20-ft (6.1-mm) LayingLength,Weight per,Length, lb(kg)14 250 0.28 (7.1) 41 (12.5) 770 (349) 855 (388)16 250 0.30 (7.6) 41 (12.5) 940 (426) 1040 (472)18 250 0.31
29、(7.9) 40 (12.2) 1090 (494) 1205 (547)20 250 0.33 (8.4) 40 (12.2) 1290 (585) 1425 (646)24 200 0.33 (8.4) 37 (11.3) 1550 (703) 1710 (776)30 150 0.34 (8.6) 33 (10.1) 2000 (907) 2210 (1002)36 150 0.38 (9.7) 33 (10.1) 2675 (1213) 2955 (1340)42 150 0.41 (10.4) 32 (9.8) 3415 (1549) 3765 (1708)48 150 0.46 (
30、12.4) 33 (10.1) 4805 (2180)54 150 0.51 (13.0) 33 (10.1) 6035 (2737)60 150 0.54 (13.7) 33 (10.1) 6930 (3143)64 150 0.56 (14.2) 33 (10.1) 7680 (3484)ANominal thickness is based on the minimum pressure class ductile iron pipeavailable installed in Type 5 trench condition in accordance with ANSI/AWWAC15
31、0/A21.50, as shown in Fig. 1, with a maximum ring deflection of 5 % andmaximum ring stress of 48 000 psi (331 MPa). Wall thickness of pipe to serve atother depths of cover may be calculated in accordance with ANSI/AWWAC150/A21.50, allowing 5 % maximum ring deflection.NOTE 1Pipe is bedded to its cent
32、erline in compacted granular materialwith a minimum of 4 in. (102 mm) under the pipe. Compacted granular orselectAmaterial is used to the top of the pipe. (Material is compacted toapproximately 90 % Standard Proctor in accordance withAASHTO T-99.)ALoose soil or select material is defined as native s
33、oil excavated fromthe trench, free of rocks, foreign material, and frozen earth.FIG. 1 Type 5 TrenchA716 1828. Additional Tests Required by Purchaser8.1 When tests other than those required in this specificationare required by the purchaser, such tests shall be specified inthe purchasers specificati
34、ons.9. Inspection and Certification by Manufacturer9.1 The manufacturer shall establish the necessary qualitycontrol and inspection practice to ensure compliance with thisspecification.9.2 The manufacturer shall, if required by the purchasersspecifications, furnish a sworn statement that the inspect
35、ionand all of the specified tests have been made and that all resultsthereof comply with the requirements of this specification.9.3 All pipes shall be without defects that could impairservice. Repairing of defects by welding or other methods shallnot be allowed if such repairs could adversely affect
36、 theserviceability of the pipe or its capability to meet strengthrequirements of this specification.10. Inspection by Purchaser10.1 If the purchaser desires to inspect pipe at the manufac-turers plant, the purchaser shall so state in the purchasersspecifications and describe the conditions (such as
37、time and theextent of inspection) under which the inspection shall be made.10.2 The purchasers representative shall have free access tothose areas of the manufacturers plant that are necessary todetermine compliance with this specification. The manufac-turer shall make available for the use of the p
38、urchasersrepresentative such gages as are necessary for inspection. Themanufacturer shall provide the purchasers representative withassistance as necessary for handling of pipe.11. Delivery and Acceptance11.1 All pipe and accessories shall comply with this speci-fication. Pipe and accessories not co
39、mplying with this specifi-cation shall be replaced by the manufacturer at the agreed pointof delivery. The manufacturer shall not be liable for shortagesor damaged pipe after acceptance at the agreed point ofdelivery, except as recorded on the delivery receipt or similardocument by the carriers agen
40、t.12. Foundry Records12.1 The results of the acceptance tests (Section 6) andlow-temperature impact tests (Section 7) shall be recorded andretained for one year, and shall be available to the purchaser atthe foundry. Written transcripts shall be furnished if requiredby the purchasers specification.1
41、3. Defective Specimens and Retests13.1 When any mechanical test specimen shows defectivemachining or lack of continuity of metal, it shall be discardedand replaced by another specimen. When any sound testspecimen fails to meet the specified mechanical propertyrequirements, the lot of pipe from which
42、 the specimen wasobtained shall be separated from acceptable pipe. The lot maybe either retested, re-heat treated as necessary and retested, orrejected. A retest shall be made on two additional sound testspecimens taken from the same lot as the specimen that failed.Dimen-sionStandard Specimen Small-
43、Size Specimens Proportional to Standard0.50-in (12.7-mm) Round 0.350-in. (8.89-mm) Round 0.250-in. (6.35-mm) Round 0.175-in. (4.45-mm) Round 0.125-in. (3.18-mm) RoundG 2.000 0.005 (50.80 0.13) 1.400 0.005 (35.56 0.13) 1.000 0.005 (25.40 0.13) 0.700 0.005 (17.78 0.13) 0.500 0.005 (12.70 0.13)D 0.500
44、0.010 (12.70 0.25) 0.350 0.007 (8.89 0.18) 0.250 0.005 (6.35 0.13) 0.175 0.005 (4.44 0.13) 0.125 0.005 (3.18 0.13)R,min38 (9.5)14 (6.4)316 (4.8)332 (2.4)332 (2.4)A, min 214 (57.2) 134 (44.4) 114 (31.8)34 (19)58 (15.9)TA0.71 and greater (18.0) 0.50 to 0.70 (12.7 to 17.8) 0.35 0.49 (8.9 to 12.4) 0.25
45、to 0.34 (6.4 8.6) 0.18 to 0.24 (4.6 to 6.1)AThickness of the section from the wall of the pipe from which the tension specimen is to be machined.NOTE 1The reduced section (A) may have a gradual taper from the ends toward the center with the ends not more than 0.005 in. (0.13 mm) largerin diameter th
46、an the center on the standard specimen and not more than 0.003 in. (0.08 mm) larger in diameter than the center on the small size specimens.NOTE 2If desired, on the small-size specimens the length of the reduced section may be increased to accommodate an extensometer. However,reference marks for the
47、 measurement of elongation should nevertheless be spaced at the indicated gage length (G).NOTE 3The gage length and fillets shall be as shown, but the ends may be of any form to fit the holders of the testing machine in such a way thatthe load shall be axial. If the ends are to be held in grips it i
48、s desirable, if possible, to make the length of the grip section great enough to allow thespecimen to extend into the grips a distance equal to two-thirds or more of the length of the grips.FIG. 2 Tension Test SpecimenA716 183Pipe that are re-heat treated or retested, or both, shall meet therequirem
49、ents of 4.1, Section 6, and Section 7.14. Rejection of Pipe14.1 If the results of any physical acceptance test fail tomeet the requirements of Section 6, 7,or13, all pipe cast in thesame period shall be rejected, except as provided in Section 15.15. Determining Rejection15.1 The manufacturer may determine the amount of pipe tobe rejected by making similar additional tests of pipe, of thesame size as the rejected pipe, until the rejected lot isbracketed, in order of manufacture, by an ac
