1、Designation: A 733 03 (Reapproved 2009)1Standard Specification forWelded and Seamless Carbon Steel and Austenitic StainlessSteel Pipe Nipples1This standard is issued under the fixed designation A 733; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、case of revision, the 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.1NOTEA units statem
3、ent was added editorially as new paragraph 1.2 in April 2009.1. Scope1.1 This specification covers the requirements for weldedand seamless carbon steel pipe nipples, black and zinc-coated(hot-dip galvanized), and welded and seamless austeniticstainless steel pipe nipples in standard steel pipe sizes
4、 from18to 12 in. inclusive, in standard or special lengths.1.1.1 Welded Carbon SteelPipe nipples ordered underthese requirements are intended for general uses, as describedby Specification A 53/A 53M.1.1.2 Seamless Carbon SteelPipe nipples ordered underthese requirements are intended for general and
5、 special uses, asdescribed by the applicable Specifications A 53/A 53M andA 106/A 106M ( see 4.1.1).1.1.3 Austenitic Stainless SteelPipe nipples ordered underthese requirements are intended for high-temperature andgeneral corrosion service, as described by Specification A 312/A 312M (see 4.1.2).1.1.
6、4 The text for this specification contains notes and/orfootnotes that provide explanatory material. Such notes andfootnotes, excluding those in tables, do not contain anymandatory language.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are ma
7、thematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A 53/A 53M Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessA 106/A 106M Specification for Seamless Carbon SteelPipe
8、for High-Temperature ServiceA 312/A 312M Specification for Seamless, Welded, andHeavily Cold Worked Austenitic Stainless Steel Pipes2.2 American National Standards Institute Standards:3B1.20.1 Pipe Threads, General PurposeB36.10 Standard for Welded and Seamless Wrought SteelPipeB36.19 Standard for S
9、tainless Steel Pipe3. Ordering Information3.1 Information items to be considered, if appropriate, forinclusion in purchase orders are as follows:3.1.1 Quantity (pieces),3.1.2 Name of material (carbon steel or austenitic stainlesssteel pipe nipples) (see 4.1.1 and 4.1.2),3.1.3 Method of pipe manufact
10、ure (continuous-welded,electric-resistance welded, or seamless). (see 4.1.1, Note 1),3.1.4 Type and grade (if stainless steel),3.1.5 Finish (carbon steel, black or galvanized),3.1.6 Size (nominal and weight class or schedule number asshown in Table 1, or outside diameter and nominal wall),3.1.7 Leng
11、th (standard or special, see 4.3),3.1.8 Specification number,3.1.9 Certification of compliance, if required, and3.1.10 Special requirements or exceptions to this specifica-tion.3.2 In addition, when material is purchased for agencies ofthe U.S. Government, it shall conform to the SupplementaryRequir
12、ements as defined herein when specified in the contractor purchase order.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved Ap
13、ril 1, 2009. Published September 2009. Originallyapproved in 1976. Last previous edition approved in 2003 as A 733 03.2For 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 t
14、o 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4
15、. Requirements4.1 Material and WeightPipe nipples covered by thisspecification shall be made from new, hydrostatic-tested orNDE-tested pipe conforming to the requirements specified in4.1.1 and 4.1.2.4.1.1 Carbon SteelCarbon steel pipe nipples shall be inaccordance with the following:Method of Pipe M
16、anufacture SpecificationWelded (Note 1)A53Seamless (Note 2) A 53A 106NOTE 1Unless otherwise specified, continuouswelded nipples arefurnished in sizes NPS 4 and under for standard and extra strong pipe, andNPS 212 and under for Schedule 160 and double extra strong pipe. Weldednipples in sizes larger
17、than that indicated for continuouswelded areelectric resistance welded.4.1.2 Austenitic Stainless SteelAustenitic stainless steelpipe nipples shall be in accordance with Specification A 312/A 312M.4.2 ThreadsPipe nipples shall be threaded on both endswith NPT taper pipe threads conforming to the req
18、uirements ofANSI B 1.20.1, except for “close” nipples where L 4 and V areshorter, due to fewer imperfect threads. It is standard manu-facturing practice on all other nipple lengths to vary L 4 plus orminus two threads. All other dimensions, tolerances, andgaging practices remain the same asANSI B 1.
19、20.1, plus 5.3 ofthis specification.4.2.1 Threads shall be right-hand on both ends, except whenotherwise specified.4.3 Lengths:4.3.1 The standard lengths and sizes of nipples generallyavailable are shown in Table 2. The availability of such nipplesaccording to pipe size and weight is shown in Table
20、1.4.3.2 Special lengths and sizes of nipples may be specifiedwhen required. Standard and special lengths shall conform tothe tolerance requirements of 4.3.3.TABLE 1 Pipe Nipple Sizes According to Weight of NominalPipe SizesABWeightNPS Designator18143812 to 6 8 10 12Standard (Schedule 40) XXXXXXCExtr
21、a strong (Schedule80)XXXXXDCSchedule 160 . . . XXXXDouble extra strong . . . XXXXAA comprehensive listing of standardized pipe dimensions is contained in ANSIB36.10 and B36.19.BContinuous-welded pipe is not made in sizes larger than NPS 4 (standard andextra strong) and larger than NPS 212 (Schedule
22、160 and double extra strong).CNPS 12 standard and extra strong weight pipe do not have designatedschedule numbers.DNPS 10 extra strong pipe is Schedule 60, not Schedule 80.TABLE 2 Pipe Nipples by Length and Nominal Pipe SizeType of Nipple NPS Designator1814381234 1114 112 2212 3312 45681012Pipe Nipp
23、le Lengths, in.ABClose (cl)3478 1118 138 112 158 134 2212 258 234 278 3318 312 378 412112 112 112 112 11222222222212 212 212 212 212 212 212 212 21233333333 333312 312 312 312 312 312 312 3312 312 31244444444 44444412 412 412 412 412 412 412 412 412 412 412 412 412 412 41255555555 555555555512 512 5
24、12 512 512 512 512 512 512 512 512 512 512 512 512 512 51266666666 666666666677777777 777777777788888888 888888888899999999 999999999910 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 1011 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 1112 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 1213 13 1
25、3 13 13 13 13 13 13 13 13 13 13 13 13 13 13 1314 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 1415 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 1516 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 1617 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 1718 18 18 18 18 18 18 18 18 18 18 18 18 18
26、18 18 18 1819 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 1920 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 2021 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 2122 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 2223 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 2324 24 24 24 24 24 24 24
27、24 24 24 24 24 24 24 24 24 24Rightandleft. . 444444 444. . . . . . .ANipples shorter than close are not recommended for pressure application.B1 in. = 25.4 mm.A 733 03 (2009)124.3.3 Nipples with lengths up through 12 in. (304.8 mm)long shall have a length tolerance of 6116 in. (1.6 mm).Nipples over 1
28、2 in. long shall have a tolerance of 618 in. (3.2mm).4.4 End FinishThe ends of the pipe nipples shall bechamfered on the outside at an angle of 35 6 10 to the centralaxis. (It is the standard practice that the18-in. (3.2-mm)nominal pipe size nipples are not chamfered.) Ends shall be cutreasonably sq
29、uare to the central axis. All burrs on the insideshall be removed.4.5 Galvanized NipplesGalvanized nipples ordered underthis specification shall be made from pipe coated on the insideand outside by the hot-dip process. Threads and nipple ends arenot galvanized.5. Sampling and Inspection5.1 SamplingS
30、amples of nipples sufficient to determinetheir conformance with the requirements of this specificationshall be taken at random for each lot of nipples of the samepipe size, length, and material.5.2 InspectionThe samples shall be inspected to deter-mine their conformance with the dimensional requirem
31、ents,including thread dimensions and finish of this specification.5.3 Gaging Techniques for Male Threads:5.3.1 An NPT working ring gage, in accordance with ANSIB1.20.1, shall be turned hand tight on the nipple threads. Thegage shall be tapped or rapped against a solid surface and thegage again turne
32、d hand tight into the thread. Hand tight meansturning the gage until moderate resistance is encountered; noexcessive force shall be used. After the second tighteningoperation, the end of the thread should be flush to the gageface, plus or minus one turn.5.3.2 The usual technique for tapping or rappi
33、ng the gage isto swing the end of the fitting with the ring gage attachedthrough an arc of approximately 4 to 6 in. (100 to 150 mm) toallow the gage to strike against a solid metal surface. Thistapping procedure is used to eliminate any binding due to slightnicks or foreign matter in the threads.NOT
34、E 2Any mechanical device that simulates the gage tapping orrapping to achieve the same results is also permitted.5.4 The inspector representing the purchaser shall haveentry, at all times while work on the contract of the purchaseris being performed, to all parts of the manufacturers worksthat conce
35、rn the manufacture of the nipples ordered. Themanufacturer shall afford the inspector all reasonable facilitiesto satisfy him that the nipples are being furnished in accor-dance with this specification. Inspection shall be made at theplace of manufacture prior to shipment, unless otherwiseTABLE 3 Da
36、sh numbers for standard and extra strong steel pipe nipplesNOMINAL PIPE SIZE1814381234 11-14 1-12 22-12 3456A OUTSIDE DIA., in.A.405 .540 .675 .840 1.05 1.31 1.660 1.900 2.375 2.875 3.500 4.500 5.563 6.62505B THICKNESS:, in.A(STANDARD) .068 .088 .091 .109 .113 .133 .140 .145 .154 .203 .216 .237 .258
37、 .280(EXTRA STRONG) .095 .119 .126 .147 .154 .179 .191 .200 .218 .276 .300 .337 .375 .432L LENGTH 6116 IN.ADASH NUMBERS34A178B251B491-18B731-38B971-12C6C29C52C75B1211-58B1451-34B1692 9 32 55 78C101C124B1932-12 10 33 56 79 102 125C148C171C194B2173 11 34 57 80 102 126 149 172 195C218C2413-12 12 35 58
38、81 104 127 150 173 196 219 2424 13 36 59 82 105 128 151 174 197 220 2434-12 14 37 60 83 106 129 152 175 198 221 244C290C3135 15 38 61 84 107 130 153 176 199 222 2455-12 16 39 62 85 108 131 154 177 200 223 2466 17 40 63 86 109 132 155 178 201 224 247 270 3167 18 41 64 87 110 133 156 179 202 225 2488
39、19 42 65 88 111 134 157 180 203 226 2499 20 43 66 89 112 135 158 181 204 227 25010 21 44 67 90 113 136 159 182 205 228 25111 22 45 68 91 114 137 160 183 206 229 25212 23 46 69 92 115 138 161 184 207 230 253Notes:A1 in. = 25.4 mmBClose type nipplesCShort (shoulder) type nipplesFIG. 1 Standard and Ext
40、ra Strong Steel Pipe NipplesA 733 03 (2009)13specified, and shall be so conducted as not to interfereunnecessarily with the operation of the works.6. Rejection6.1 Each nipple that fails to meet the requirement of thisspecification shall be rejected, and the manufacturer notified.7. Certification7.1
41、When requested at the time the order is placed, themanufacturer shall provide certification that the nipples complyto all the requirements of this specification.7.2 The nipple manufacturer shall maintain a record on pipemill test report certifications.8. Identification and Packaging8.1 Individual ni
42、pples are not normally identified. Packagednipples shall have their containers legibly marked to show thebrand or name of manufacturer, size, length, quantity, methodof pipe manufacture, type and grade of material (if other thancarbon steel), ASTM A 733, and finish.8.2 At manufacturers option, large
43、 size, extra long nipples,and odd lots are bagged or bundled with tags identifying theproduct in accordance with 8.1.9. Keywords9.1 carbon steel fittings; pipe fittings; pipe nipples; stainlesssteel fittingsSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall apply only when spec
44、ified by the purchaser in theinquiry, contract, or order, for agencies of the U.S. Government.S1.1 Part Numbering SystemThis supplement provides apart numbering system for identification of standard items forgovernment use of Specification A 733. (See also Table 3 andFig. 1).NOTE S1.1The government
45、encourages the general use of this partnumbering system to achieve maximum parts standardization.S1.2 The part number consists of the document identifierfollowed by the code for the weight of material (standard orextra strong), a dash, dash number, material code, method ofmanufacture code, and finis
46、h code (see example).S1.2.1 ExamplePart Identifying Number“A733S198CFB” is constructed as follows in Fig. S1: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 advised
47、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 reap
48、proved 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 you
49、 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. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-955
