1、Designation: A 733 03Standard 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 case of revision, t
2、he year of last revision. 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
3、 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 from18to 12 in. inclusive, in standard or special lengths.1.1.1 Welded Carbon SteelPipe nipples o
4、rdered underthese requirements are intended for general uses, as describedby Specification A 53.1.1.2 Seamless Carbon SteelPipe nipples ordered underthese requirements are intended for general and special uses, asdescribed by the applicable Specifications A 53 and A 106 ( see4.1.1).1.1.3 Austenitic
5、Stainless SteelPipe nipples ordered underthese requirements are intended for high-temperature andgeneral corrosion service, as described by Specification A 312(see 4.1.2).1.1.4 The text for this specification contains notes and/orfootnotes that provide explanatory material. Such notes andfootnotes,
6、excluding those in tables, do not contain anymandatory language.2. Referenced Documents2.1 ASTM Standards:A 53 Specification for Pipe, Steel, Black and Hot-Dipped,Zinc-Coated, Welded and Seamless2A 106 Specification for Seamless Carbon Steel Pipe forHigh-Temperature Service2A 312 Specification for S
7、eamless and Welded AusteniticStainless Steel Pipes22.2 American National Standards Institute Standards:3B1.20.1 Pipe Threads, General PurposeB36.10 Standard for Welded and Seamless Wrought SteelPipeB36.19 Standard for Stainless Steel Pipe3. Ordering Information3.1 Information items to be considered,
8、 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 manufacture (continuous-welded,electric-resistance welded, or seamless). (see 4.1.1, Note
9、 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 Length (standard or special, see 4.3),3.1.8 Specification number,3.1.9 Certification
10、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 SupplementaryRequirements as defined herein when specified in the contractor purchase order.4. Requi
11、rements4.1 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 Manufact
12、ure SpecificationWelded (Note 1) A 53Seamless (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 than
13、that indicated for continuouswelded areelectric resistance welded.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 Apr. 10,
14、 2003. Published May 2003. Originallyapproved in 1976. Last previous edition approved in 2001 as A 733-01.2Annual Book of ASTM Standards, Vol 01.01.3Available from American National Standards Institute, 11 West 42nd St., 13thFloor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Dr
15、ive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.2 Austenitic Stainless SteelAustenitic stainless steelpipe nipples shall be in accordance with Specification A 312.4.2 ThreadsPipe nipples shall be threaded on both endswith NPT taper pipe threads conforming to the requirements of
16、ANSI 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 as ANSI B 1.20.1, plus
17、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 1.4.3.2 Spe
18、cial lengths and sizes of nipples may be specifiedwhen required. Standard and special lengths shall conform tothe tolerance requirements of 4.3.3.4.3.3 Nipples with lengths up through 12 in. (304.8 mm)long shall have a length tolerance of 6116 in. (1.6 mm).Nipples over 12 in. long shall have a toler
19、ance 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 square to the central axis. All
20、 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 SamplingSamples of nipples sufficient
21、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.TABLE 1 Pipe Nipple Sizes According to Weight of NominalPipe SizesABWeightNPS Designator18143812 to 6 8 10 12Standard (Schedule 40) XXX
22、XXXCExtra 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(Sc
23、hedule 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 45681012Pi
24、pe Nipple 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 55555555551
25、2 512 512 512 512 512 512 512 512 512 512 512 512 512 512 512 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 12
26、13 13 13 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
27、 18 18 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
28、 24 24 24 24 24 24 24 24 24 24 24 24Right and left . . 444444 444. . . . . . .ANipples shorter than close are not recommended for pressure application.B1 in. = 25.4 mm.A7330325.2 InspectionThe samples shall be inspected to deter-mine their conformance with the dimensional requirements,including thre
29、ad 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 turned hand tight into t
30、he 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 rapping the gage isto sw
31、ing 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.NOTE 2Any mechanical d
32、evice 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 concern the manufacture
33、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 otherwisespecified, and shall be so co
34、nducted 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 When requested at the time the order is placed, themanufacturer shall prov
35、ide 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 nipples are not normally identified. Packagednipples shall have their contai
36、ners 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 size, extra long nipples,and odd lots are bagged or bundled with tags ide
37、ntifying theproduct in accordance with 8.1.TABLE 3 Dash numbers for standard and extra strong steel pipe nipplesNOMINAL PIPE SIZE1814381234 11-14 1-12 22-12 345 6A 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
38、.091 .109 .113 .133 .140 .145 .154 .203 .216 .237 .258 .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
39、 11 34 57 80 102 126 149 172 195C218C2413-12 12 35 58 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
40、247 270 3167 18 41 64 87 110 133 156 179 202 225 2488 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 nipple
41、sCShort (shoulder) type nipplesFIG. 1 Standard and Extra Strong Steel Pipe NipplesA7330339. Keywords9.1 carbon steel fittings; pipe fittings; pipe nipples; stainlesssteel fittingsSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall apply only when specified by the purchaser in th
42、einquiry, 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 encourages the general use o
43、f 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 finish code (see example).S1.2.1
44、ExamplePart Identifying Number“A733S198CFB” is constructed as follows in Fig. S1:SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last edition (A 733-01)that may impact the use of this standards (approved April 2003).(1) 4.1was revised to per
45、mit the use of NDE-tested pipe.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 that determination of the validity of any such patent rights, and the riskof i
46、nfringement 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 reapproved or withdrawn. Your comments are invited either for revision of this sta
47、ndard 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 feel that your comments have not received a fair hearing you shouldmake your
48、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), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. S1 Construction of Part Identifying NumberA733034
