1、Designation: A733 03 (Reapproved 2009)1A733 13Standard Specification forWelded and Seamless Carbon Steel and Austenitic StainlessSteel Pipe Nipples1This standard is issued under the fixed designation A733; the number immediately following the designation indicates the year oforiginal adoption or, in
2、 the 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.1 NOTEA units
3、statement was added editorially as new paragraph 1.2 in April 2009.1. Scope Scope*1.1 This specification covers the requirements for welded and seamless carbon steel pipe nipples, black and zinc-coated (hot-dipgalvanized), and welded and seamless austenitic stainless steel pipe nipples in standard s
4、teel pipe sizes from 18 to 12 in. inclusive,in standard or special lengths.1.1.1 Welded Carbon SteelPipe nipples ordered under these requirements are intended for general uses, as described bySpecification A53/A53M.1.1.2 Seamless Carbon SteelPipe nipples ordered under these requirements are intended
5、 for general and special uses, asdescribed by the applicable Specifications A53/A53M and A106/A106M ( see (see 4.1.1).1.1.3 Austenitic Stainless SteelPipe nipples ordered under these requirements are intended for high-temperature and generalcorrosion service, as described by Specification A312/A312M
6、 (see 4.1.2).1.1.4 The text for this specification contains notes and/or footnotes that provide explanatory material. Such notes and footnotes,excluding those in tables, do not contain any mandatory language.1.2 The values stated in inch-pound units are to be regarded as standard. The values given i
7、n parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A53/A53M Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessA106/A106M Specification for Seamless
8、Carbon Steel Pipe for High-Temperature ServiceA312/A312M Specification for Seamless, Welded, and Heavily 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 Steel PipeB36
9、.19 Standard for Stainless Steel Pipe3. Ordering Information3.1 Information items to be considered, if appropriate, for inclusion in purchase orders are as follows:3.1.1 Quantity (pieces),3.1.2 Name of material (carbon steel or austenitic stainless steel pipe nipples) (see 4.1.1 and 4.1.2),3.1.3 Met
10、hod of pipe manufacture (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 as shown in Table 1, or outside diameter and no
11、minal wall),1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.09on Carbon Steel Tubular Products.Current edition approved April 1, 2009Oct. 1, 2013. Published September 2009October 2013
12、. Originally approved in 1976. Last previous edition approved in 2003 asA733 03.A733 03 (2009)1. DOI: 10.1520/A0733-03R09E01.10.1520/A0733-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolu
13、me information, refer to the standards Document Summary page on the ASTM website.3 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM
14、standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by
15、 ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.7 Length (standard or special, see 4.3),3.1.8 Specification number,3.
16、1.9 Certification of compliance, if required, and3.1.10 Special requirements or exceptions to this specification.3.2 In addition, when material is purchased for agencies of the U.S. Government, it shall conform to the SupplementaryRequirements as defined herein when specified in the contract or purc
17、hase order.4. Requirements4.1 Material and WeightPipe nipples covered by this specification shall be made from new, hydrostatic-tested or NDE-testedpipe conforming to the requirements specified in 4.1.1 and 4.1.2.4.1.1 Carbon SteelCarbon steel pipe nipples shall be in accordance with the following:M
18、ethod of Pipe Manufacture SpecificationWelded (Note 1) A53Seamless (Note 2) A53A106NOTE 1Unless otherwise specified, continuouswelded nipples are furnished in sizes NPS 4 and under for standard and extra strong pipe, and NPS212 and under for Schedule 160 and double extra strong pipe. Welded nipples
19、in sizes larger than that indicated for continuouswelded are electricresistance welded.4.1.2 Austenitic Stainless SteelAustenitic stainless steel pipe nipples shall be in accordance with Specification A312/A312M.4.2 ThreadsPipe nipples shall be threaded on both ends with NPT taper pipe threads confo
20、rming to the requirements ofANSIB 1.20.1, except for “close” nipples where L 4 and V are shorter, due to fewer imperfect threads. It is standard manufacturingpractice on all other nipple lengths to vary L 4 plus or minus two threads. All other dimensions, tolerances, and gaging practicesremain the s
21、ame as ANSI B 1.20.1, plus 5.3 of this specification.4.2.1 Threads shall be right-hand on both ends, except when otherwise specified.4.3 Lengths:4.3.1 The standard lengths and sizes of nipples generally available are shown in Table 2. The availability of such nipplesaccording to pipe size and weight
22、 is shown in Table 1.4.3.2 Special lengths and sizes of nipples may be specified when required. Standard and special lengths shall conform to thetolerance 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 6 116 in. (1.6 mm). Nipples o
23、ver12 in. long shall have a tolerance of 6 18 in. (3.2 mm).4.4 End FinishThe ends of the pipe nipples shall be chamfered on the outside at an angle of 35 6 10 to the central axis.(It is the standard practice that the 18-in. (3.2-mm) nominal pipe size nipples are not chamfered.) Ends shall be cut rea
24、sonablysquare to the central axis. All burrs on the inside shall be removed.4.5 Galvanized NipplesGalvanized nipples ordered under this specification shall be made from pipe coated on the inside andoutside by the hot-dip process. Threads and nipple ends are not galvanized.5. Sampling and Inspection5
25、.1 SamplingSamples of nipples sufficient to determine their conformance with the requirements of this specification shall betaken at random for each lot of nipples of the same pipe size, length, and material.TABLE 1 Pipe Nipple Sizes According to Weight of Nominal PipeSizesABWeightNPS Designator18 1
26、4 38 12 to 6 8 10 12Standard (Schedule 40) X X X X X X CExtra strong (Schedule80)X X X X X D CSchedule 160 . . . X X X XDouble extra strong . . . X X X XA A comprehensive listing of standardized pipe dimensions is contained in ANSIB36.10 and B36.19.B Continuous-welded pipe is not made in sizes large
27、r than NPS 4 (standard andextra strong) and larger than NPS 212 (Schedule 160 and double extra strong).C NPS 12 standard and extra strong weight pipe do not have designated schedulenumbers.D NPS 10 extra strong pipe is Schedule 60, not Schedule 80.A733 1325.2 InspectionThe samples shall be inspected
28、 to determine their conformance with the dimensional requirements, includingthread dimensions and finish of this specification.5.3 Gaging Techniques for Male Threads:5.3.1 An NPT working ring gage, in accordance with ANSI B1.20.1, shall be turned hand tight on the nipple threads. The gageshall be ta
29、pped or rapped against a solid surface and the gage again turned hand tight into the thread. Hand tight means turningthe gage until moderate resistance is encountered; no excessive force shall be used. After the second tightening operation, the endof the thread should be flush to the gage face, plus
30、 or minus one turn.5.3.2 The reference point for gaging is the end of the thread provided the chamfer is not smaller than the minor diameter of theexternal thread. When a chamfer on the external thread exceeds this limit, the reference point becomes the last thread scratch onthe chamfer cone.5.3.3 T
31、he usual technique for tapping or rapping the gage is to swing the end of the fitting with the ring gage attached throughan arc of approximately 4 to 6 in. (100 to 150 mm) to allow the gage to strike against a solid metal surface. This tapping procedureis used to eliminate any binding due to slight
32、nicks or foreign matter in the threads.NOTE 2Any mechanical device that simulates the gage tapping or rapping to achieve the same results is also permitted.5.4 The inspector representing the purchaser shall have entry, at all times while work on the contract of the purchaser is beingperformed, to al
33、l parts of the manufacturers works that concern the manufacture of the nipples ordered. The manufacturer shallafford the inspector all reasonable facilities to satisfy him that the nipples are being furnished in accordance with this specification.Inspection shall be made at the place of manufacture
34、prior to shipment, unless otherwise specified, and shall be so conducted asnot to interfere unnecessarily with the operation of the works.6. Rejection6.1 Each nipple that fails to meet the requirement of this specification shall be rejected, and the manufacturer notified.TABLE 2 Pipe Nipples by Leng
35、th and Nominal Pipe SizeType of Nipple NPS Designator18 14 38 12 34 1 114 112 2 212 3 312 4 5 6 8 10 12Pipe Nipple Lengths, in.ABClose (cl) 34 78 1 118 138 112 158 134 2 212 258 234 278 3 318 312 378 412112 112 112 112 1122 2 2 2 2 2 2 2212 212 212 212 212 212 212 212 2123 3 3 3 3 3 3 3 3 3 3312 312
36、 312 312 312 312 312 3 312 312 3124 4 4 4 4 4 4 4 4 4 4 4 4412 412 412 412 412 412 412 412 412 412 412 412 412 412 4125 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5512 512 512 512 512 512 512 512 512 512 512 512 512 512 512 512 5126 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 67 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 78 8 8 8 8 8
37、8 8 8 8 8 8 8 8 8 8 8 89 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 910 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 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
38、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 18 18 18 1819 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 1920 20 20 20
39、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 24 24 24 24 24 24 24 24 24 24Right and left . . 4 4 4 4 4 4 4 4 4 . . . . .
40、. .A Nipples shorter than close are not recommended for pressure application.B 1 in. = 25.4 mm.A733 1337. Certification7.1 When requested at the time the order is placed, the manufacturer shall provide certification that the nipples comply to allthe requirements of this specification.7.2 The nipple
41、manufacturer shall maintain a record on pipe mill test report certifications.8. Identification and Packaging8.1 Individual nipples are not normally identified. Packaged nipples shall have their containers legibly marked to show the brandor name of manufacturer, size, length, quantity, method of pipe
42、 manufacture, type and grade of material (if other than carbon steel),ASTM A733, and finish.8.2 At manufacturers option, large size, extra long nipples, and odd lots are bagged or bundled with tags identifying the productin accordance with 8.1.9. Keywords9.1 carbon steel fittings; pipe fittings; pip
43、e nipples; stainless steel fittingsTABLE 3 Dash numbersNumbers for standard and extra strong steel pipe nipplesStandard and Extra Strong Steel Pipe NipplesNOMINAL PIPE SIZE 18 14 38 12 34 1 1-14 1-12 2 2-12 3 4 5 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
44、 5.563 6.6250 5B THICKNESS:, in.A(STANDARD) .068 .088 .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 116 IN.A DASH NUMBERS34 A 178 B 251 B 491-18 B 731-38 B 971-12 C 6 C 29 C 52 C 75 B 1211-58 B
45、1451-34 B 1691-34 B 1692 9 32 55 78 C 101 C 124 B 1932-12 10 33 56 79 102 125 C 148 C 171 C 194 B 2173 11 34 57 80 102 126 149 172 195 C 218 C 2413 11 34 57 80 103 126 149 172 195 C 218 C 2413-12 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
46、 152 175 198 221 244 C 290 C 3135 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 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
47、 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:A 1 in. = 25.4 mmB Close type nipplesC Short (shoulder) type nipplesFIG. 1 Standard and Extra Strong Steel Pipe NipplesA733 134SUPPLEMENTARY REQUIREMENTSThe following supplementar
48、y requirements shall apply only when specified by the purchaser in theinquiry, contract, or order, for agencies of the U.S. Government.S1.1 Part Numbering SystemThis supplement provides a part numbering system for identification of standard items forgovernment use of Specification A733. (See also Ta
49、ble 3 and Fig. 1).NOTE S1.1The government encourages the general use of this part numbering system to achieve maximum parts standardization.A733 135S1.2 The part number consists of the document identifier followed by the code for the weight of material (standard or extrastrong), a dash, dash number, material code, method of manufacture code, and finish code (see example).S1.2.1 ExamplePart Identifying Number “A733S198CFB” is constructe
