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A268a268m-10 Standard Specification For Seamless And Welded Ferritic And Martensitic Stainless Steel Tubing For General Service

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Designation: A268/A268M − 10 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service 1 This standard is issued under the fixed designation A268/A268M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the U.S. Department of Defense. A763  Practices for Detectin A763 Practices Detecting g Suscep Susceptibility tibility to Inter Intergranu granular lar Attack in Ferritic Stainless Steels A1016/A1016M Specification A1016/A1016M  Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes E213 Pra Practic cticee for Ultr Ultraso asonic nic Testi esting ng of Met Metal al Pip Pipee and Tubing E273   Practice for Ultrasonic Testing of the Weld Zone of  E273 Welded Pipe and Tubing 1. Sco Scope* pe* 1.1 This spec specifica ification tion2 co cove vers rs a nu numb mber er of gr grad ades es of  nominalnomi nal-wallwall-thick thickness ness,, stain stainless less steel tubi tubing ng for gene general ral corrosion-resisting and high-temperature service. Most of these grades are commonly known as the “straight-chromium” types and are charac characterized terized by being ferromagnetic. ferromagnetic. Two Two of these grades, TP410 and UNS S 41500 ( Table 1) 1), are amenable to hardening by heat treatment, and the high-chromium, ferritic alloys allo ys are sen sensiti sitive ve to not notchch-bri brittle ttlenes nesss on slo slow w coo cooling ling to ordinary ordin ary temper temperatures atures.. These features should be recog recognized nized in the use of these materials. Grade TP439 is used primarily for hot-wa hot -water ter tan tank k ser servic vicee and doe doess not req requir uiree pos post-w t-weld eld hea heatt treatment to prevent attack of the heat affected zone. 3. Terminology 3.1   Lot Definitions: 3.1. 3. 1.1 1 Fo Forr fla flang ngee an and d fla flarin ring g re requ quir irem emen ents ts,, th thee ter term m lo lott applies to all tubes, prior to cutting, of the same nominal size and wall thickness that are produced from the same heat of  steel. If final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and from the same heat that are heat treated in the same furnace charge. If  the final heat treatment is in a continuous furnace, the number of tubes of the same size and from the same heat in a lot shall be determined from the size of the tubes as given in  Table 2. 2. 3.1.2 For tensile and hardness hardness test requiremen requirements, ts, the term lot appl ap plie iess to all tu tube bes, s, pr prio iorr to cu cutt ttin ing, g, of th thee sam samee no nomin minal al diameter and wall thickness that are produced from the same heat of steel. If final heat treatment is in a batch-type furnace, a lot shall include only those tubes of the same size and the same heat that are heat treated in the same furnace charge. If  the final heat treatment is in a continuous furnace, a lot shall include all tubes of the same size and heat, heat treated in the same furnace at the same temperature, time at heat, and furnace speed. 1.2 An optional supplementary supplementary requirement is provided, provided, and when desired, shall be so stated in the order. 1.3 The values stated in either inch-poun inch-pound d units or SI units are to be regarded separately as standard. Within the text, the SI un unit itss ar aree sh show own n in br brac acke kets ts.. Th Thee va valu lues es st state ated d in ea each ch system may not be exact equivalents; therefore, each system shall sha ll be use used d ind indepe epende ndently ntly of the oth other er.. Com Combin bining ing val values ues from the two systems may result in non-conformance with the standar stan dard. d. The inc inch-p h-poun ound d uni units ts sha shall ll app apply ly unl unless ess the “M” designation of this specification is specified in the order. 2. Referen Referenced ced Documents Documents 2.1   ASTM Standards:3 A480/A480M Specifi Specification cation for Gener General al Requir Requirements ements for Flat-Rol Flat -Rolled led Stain Stainless less and Heat Heat-Res -Resistin isting g Steel Plat Plate, e, Sheet, and Strip 1 This specification is under the jurisdiction of ASTM Committee  A01  A01 on  on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.10 on A01.10  on Stainless and Alloy Steel Tubular Products. Curren Cur rentt edi edition tion app approve roved d Apr April il 1, 201 2010. 0. Pub Publis lished hed May 201 2010. 0. Ori Origin ginall ally y approved approv ed in 1944. Last previous edition appro approved ved in 2005a as A268/A A268/A268M– 268M–05a. 05a. DOI: 10.1520/A0268_A0268M-10. 2 For ASME Boile Boilerr and Pres Pressure sure Vessel Vessel Code appli application cationss see relat related ed Speci Specifification SA-268 in Section II of that Code. 3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [email protected] For  Annual Book of ASTM  Standards volume information, refer to the standard’s Document Summary page on the ASTM website. 4. Order Ordering ing Information Information 4.1 It is the responsi responsibili bility ty of the pur purcha chaser ser to spe specify cify all requirements that are necessary for material ordered under this specifi spe cificati cation. on. Suc Such h req requir uireme ements nts may inc includ lude, e, but are not limited to, the following: 4.1.1 Quant Quantity ity (feet, metres, or numbe numberr of length lengths), s), 4.1.2 Name of material (seamless (seamless or welded tubes), 4.1.3 Grade (Table 1) 1), 4.1.4 Size (outside diameter diameter and nomin nominal al wall thickn thickness), ess), *A Summary of Changes section appears at the end of this standard Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. 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   a    x     d    v    n    m     i    o    l    o    C     d     S   n    n    a    a    e    e    b    a    a     (    a    s    e    g    m    s    a     b    a    m    o     N     t    r     k     i    r     ⁄    r     U    i    m    m  ,    m    r     t  ,     t    m    m    s    m    c    a    u    m    a     i    a    b     l    o    o    e  ,    n  ,  ,     i ,     i    r    o    l ,    u  ,     G    e     l     b     i     F     P    C    N    C    C     D     E    C    M    P    S    S    N    C     M    A    C    N     T     C    n    B     C     D     E     F     A     i     8     6     4     P     T     0  .     0    0    0    0    0    0    0  .     3    0    4    3    0    5    0  .     0  .     0  .  .     2  .     1  .     0  .     1  .   –     0     0    0     0    0     0  .     8     1     5  .     2     5     5  .  .     0    0    2    5     3     8    0    5     1     1     4     3     0     0     0   –   –   –  .     0     0  .  .     0     2     0  .  .     1    0     1    0     4  .     5  .  .     2     0     1     S     3     0     1     0     0  .     5    0  .     5     4     3    0    0  .     8     4     1     9     0     0  .  .     0  .     0     0  .  . .     1     3     0  .  .  .   –     1     1     4     0    0     0     S     5  .     7     0     0    1     7     0  .  .     5    0    1    5     7     3    0    0  .     2     4     1     9     0     0  .   –     1  .     5  .     0     0  .     0     0  .  .  .     0   –     1     1     4     0    0     3     S  .     0     0    5  .     0     1     0  .     5     3     C     0  .  .     5    0    4    9     0     5    5    0     2     0    5   –    2     8     1  .     2   –   –     0     0  .     2     0  .  .     0    0  .     0    0     3     0  .     0  .  .     8     0     3     S     8     1     2     0     5     0     0    0    x   –    0    2  .     3     3    0    4    3    0    a     0    m    0  .     4     7     0    0     0     0   –  .     0     0  .  .     0     4  .     1  .  .     1    0    8    3    0     4     0     0    0     0  .     2     6     S  .     1     3     0  .     5     5     5     0    0     5  .     6  .     3     2    0    4    3    5    4     4     2     6     0    0     7   –   –   –  .     0     0  .     4  .     1  .  .     0    5     4     0  .     5  .  .     5     0    0     3     S     4     3     2     0  .     0     0     0    0     0  .     8     0     6     3    0    4    3    0    5  .     2     4     6     0    0     3     0   –   –  .     0     0  .     4   –  .     1  .  .     1    0    0     0     4     0  .     0    0  .  .     3     S     1    5     2     %  ,     0    n  .     2     0     i     5    o  .     0  .     0     5     0     0     t     0     0     2     4     3     1     2     2     8     i     3     2   –   –   –     0  .     0     0  .     4    s  .  .  .     4    o  .     0  .  .     5     0    0    0    0    0    0     2    8     3     S    p    m     2    o     C     0  .     0     0     5    0    x  .     0     2     0     1    0    2    2    0    a    m    3     4     7     0    3     2   –   –  .     0     0  .     4  .     0  .  .     0    5    0     5     4     0  .     0    0     1  .  .     3     S     0    8     2     5  .     0     0     5     0    0    x     9     5  .     0     2    0    4    3    0    a     1     2    m     4     0    0     0   –   –  .     0     0  .     4  .     1  .  .     1    0    5     5     4     0     0    0     0  .  .     7     S  .     1    7     1     1    x    0  .     0     6     7     5  .     0    5    a     2     6    5    0     2     4    2    7    m  –     1     6     0   –  .     7  .     0     0  .     4     0  .  .     0    0    0     5     0    0     4     0     5  .  .     7     S  .     0    5     2     0    x    5  .     0     7     A     7     5  .     2     1    0    2    2    0    a     2     1    m     6     0    4   –   –  .     0  .     0  .     4  .     D     0     4  .     5     4     0    0    0    0    0    5  .  .     7     S  .     0    5     2     0    x     6   –    0     0    0    a     3     0    0    0     5     4    3    0    m    0  .  .     0     1  .     0  .     0     0  .     5    0  .     9  . .     3     0  .  .     1    0    0    1    7    6    1     4  .     1     S     0     0     0     8     6     4     S     0     3  .     0   –     7     0  .     0     0     5  .     0   –     0     3  .     0     0     6  .     0   –     0     1  .     0     0     6  .     0   –     0     1  .     0 3 A268/A268M − 10 4.1.5 Length (specific (specific or rando random), m), 4.1.6 Option Optional al requi requirement rementss (hyd (hydrostat rostatic ic or nond nondestruc estructive tive electric test, Section 16 16), ), 4.1.7 Test report required (Certification (Certification Section of Specifi Specifi-cation A1016/A1016M cation  A1016/A1016M), ), 4.1.8 Specific Specification ation designation, designation, 4.1.9 Inter Intergranu granular lar corrosion test, and 4.1.10 4.1.1 0 Specia Speciall requi requirement rements. s. material in the heat or lot shall be rejected or, at the option of  the producer, each billet or tube may be individually tested for acceptance. Billets, lengths of flat-rolled stock or tubes which do not meet the requiremen requirements ts of the specificati specification on sha shall ll be rejected. 10. Tensile Requirements Requirements 10.1 The mat 10.1 materia eriall sha shall ll con confor form m to the ten tensile sile pro proper perties ties prescribed in Tables in  Tables 3 and 4. 4. TABLE 2 Number of Tubes in a Lot Heat Treated by the Continuous Process 11. Hardness Requirements Requirements 11.1 The tubes shall have a hardness number not to exceed 11.1 those prescribed in  Table 5. 5. Size of Lot Size of Tube 2 in. [50.8 mm] and over in outside diameter and 0.200 in. [5.1 mm] and over in wall thickness Less than 2 in. [50.8 mm] but over 1 in. [25.4 mm] in outside diameter or over 1 in. [25.4 mm] in outside diameter and under 0.200 in. [5.1 mm] in wall thickness 1 in in.. [2 [25.4 5.4 mm mm]] or le less ss in ou outs tsid ide e di diam amet eter er not more than 50 tubes TABLE 3 Tensile Requirements not more than 75 tubes nott mo no more re th than an 12 125 5 tu tube bes s Grade and UNS Designation TP405 S40500 .. . S40800 TP410 S41000 TP429, TP430, and TP430 Ti S429000, S 43000, and S 43036 TP443 S44300 TP446-1 S44600 TP446-2 S44600 TP409 S40900 TP439 S43035 S 43 9 32 .. . S41500 TPXM-27 S44627 TPXM-33 S44626 18Cr-2Mo S44400 29-4 and 29-4-2 S44700 and S44800 26-3-3 S44660 25-4-4 S44635 .. . S44735 28-2-3.5 S 32 80 3 S 40 9 77 S 43 9 40 S 42 0 35 TP468 S46800 5. General Requiremen Requirements ts 5.1 Mat Materi erial al fur furnis nished hed und under er thi thiss spe specific cificatio ation n sha shall ll con con-form to the applicable requirements of Specification  A1016/  A1016M unless A1016M  unless otherwise provided herein. 6. Manuf Manufactu acture re 6.1 Th 6.1 Thee tu tube bess sh shall all be ma made de by th thee se seam amles lesss or we weld lded ed process with no filler metal added. 7. Heat Treatment Treatment 7.1 As a fina finall hea heatt tre treatme atment, nt, tubes tubes sha shall ll be reheated reheated to a tempera temp eratur turee of 120 1200 0 °F [65 [650 0 °C] or hig higher her and coo cooled led (as approp app ropria riate te for the gra grade) de) to mee meett the req requir uiremen ements ts of thi thiss specification. 7.2 The martensitic martensitic grade grade UNS S 41500 shall be reheated reheated to a te temp mper erat atur uree of 95 950 0 °F [5 [510 10 °C] or hi high gher er an and d co cool oled ed as appropriate to meet the requirements of this specification. 8. Chem Chemical ical Compositi Composition on 8.1 The steel sha shall ll con confor form m to the chemical chemical req requir uireme ements nts prescribed prescr ibed in in Table  Table 1. 1. 9. Pro Product duct Analysis Analysis 9.1 An analysis of either one billet or one length of flatrolled stock or one tube shall be made from each heat. The chemical composition thus determined shall conform to the requirements specified. 9.2 The product product analysis tolerance tolerance of the Chemical RequireRequirements Table of  A480/A480M shall  A480/A480M  shall apply. The product analysis tolerance is not applicable to the carbon content for material with a specified maximum carbon of 0.04 % or less. A ElongationA Tensile strength, min, ksi [MPa] Yield strength, min, ksi [MPa] 6 0 [4 1 5 ] 3 0 [ 20 5 ] 20 5 5 [3 8 0 ] 3 0 [ 20 5 ] 20 6 0 [4 1 5 ] 3 0 [ 20 5 ] 20 6 0 [4 1 5 ] 3 5 [ 24 0 ] 20 7 0 [4 8 5 ] 4 0 [ 27 5 ] 20 7 0 [4 8 5 ] 4 0 [ 27 5 ] 18 6 5 [4 5 0 ] 4 0 [ 27 5 ] 20 5 5 [3 8 0 ] 2 5 [ 17 0 ] 20 6 0 [4 1 5 ] 3 0 [ 20 5 ] 20 6 0 [4 1 5 ] 3 0 [ 20 5] 20 115 [795] 90 [ 62 0] 15 6 5 [4 5 0 ] 4 0 [ 27 5 ] 20 6 8 [4 7 0 ] 4 5 [ 31 0 ] 20 6 0 [4 1 5 ] 4 0 [ 27 5 ] 20 8 0 [5 5 0 ] 6 0 [ 41 5 ] 20 8 5 [5 8 5 ] 6 5 [ 45 0 ] 20 9 0 [6 2 0 ] 7 5 [ 51 5 ] 20 7 5 [5 1 5 ] 6 0 [ 41 5 ] 18 8 7 [6 0 0 ] 6 5 [4 5 0 ] 6 2 [4 3 0 ] 8 0 [5 5 0 ] 72 41 36 55 [ 50 0] [ 28 0] [ 25 0] [ 38 0] 16 18 18 16 6 0 [4 1 5 ] 30 [205] 30 22 B  , in 2 in. or 50 mm, min, % For tubing smaller than 1 ⁄ 2 in. [12.7 mm] in outsid outside e diamet diameter, er, the elonga elongation tion values val ues giv given en for str strip ip spe specim cimens ens in in   Table Table 2   shall apply apply.. Mechan Mechanical ical proper property ty requir req uireme ements nts do not app apply ly to tub tubing ing sma smalle llerr tha than n 1 ⁄ 8 in. [3.2 mm] in out outsid side e diameter or with walls thinner than 0.015 in. [0.4 mm]. B  For longitudinal strip tests a deduction of 0.90 % for TP446–1 and S44735 and 1.00 % for all other grades shall be made from the basic minimum elongation for 32 in. [0. 16 in each  1 ⁄ 32 [0.8 8 mm] dec decrea rease se in wal walll thi thickn ckness ess bel below ow 5 ⁄ 16 in.. [8 mm mm]. ]. Th The e following follow ing table gives the comput computed ed minimu minimum m values values:: 9.3 If the original test for product product analysis fails, retests retests of  two additional billets, lengths of flat-rolled stock or tubes shall be made. Both retests for the elements in question shall meet the requirements of the specification; otherwise all remaining 4 A268/A268M − 10 TABLE 4 Minimum Elongation Values 12.2 The permissible permissible variations variations in outside diameter diameter given in Table 6 are 6  are not sufficient to provide for ovality in thin-walled tubes, as defined in the Table. Table. In such tubes, the maximum and minimum diameters at any cross section shall deviate from the nomi no mina nall di diame ameter ter by no mo more re th than an tw twic icee th thee pe perm rmis issib sible le variation in outside diameter given in   Table 6; 6;   however, the mean diameter at that cross section must still be within the given permissible variation. A Elongation in 2 in. or 50 mm, min, % Wall Thickness i n. 16 [0.312]  ⁄ 16 32 [0.281]  ⁄ 32 1  ⁄ 4 [0.250] 7 32 [0.219]  ⁄ 32 3 16 [0.188]  ⁄ 16 5 32 [0.156]  ⁄ 32 1  ⁄ 8 [0.125] 3 32 [0.094]  ⁄ 32 1 16 [0.062]  ⁄ 16 0 .0 6 2 – 0 .0 3 5 , ex c l 0 .0 3 5 – 0 .0 2 2 , ex c l 0 .0 2 2 – 0 .0 1 5 , i nc l 5 9 mm TP446–1 and S447 S4 4735 35 S415 S4 1500 00 All Other Grades 8 7. 2 6. 4 5. 6 4. 8 4 3. 2 2. 4 1. 6 1 .6 – 0 .9 0 .9 – 0 .6 0 .6 – 0 .4 18 17 16 15 14 13 13 12 11 10 10 10 15 14 14 13 12 11 11 10 9 8 8 8 20 19 18 17 16 15 14 13 12 12 11 11 12.3 When the specified specified wall is 2 % or less of the specified specified outside diameter, the method of measurement is in accordance with the agreement between the purchaser and the manufacturer (see Note (see  Note 1). 1). NOTE 1—Very thin wall tubing may not be stiff enough for the outside diameter to be accurately measured with a point contact test method, such as with the use of a micrometer or caliper. When very thin walls are specifi spe cified, ed, “go “go”–“ ”–“no no go” rin ring g gag gages es are com common monly ly use used d to mea measur suree diameters of 11 ⁄ 2   in. [38.1 mm] or less. A0.002-in. [0.05-mm] additional tolerance is usually added on the “go” ring gage to allow clearance for sliding. On larger diameters, measurement is commonly performed with a pi tap tape. e. Other test met method hodss suc such h as optical optical tes testt met method hodss may also be considered. A Calcul Cal culate ated d elo elonga ngatio tion n req requir uireme ements nts sha shallll be rou rounde nded d to the nea neares restt who whole le number. 32  in. [0.8 Note—The above table gives the computed minimum values for each 1 ⁄ 32 mm] decrease in wall thickness. Where the wall thickness lies between two values shown above, the minimum elongation value shall be determined by the following equation: Grade TP446–1 and S44735 S 4 15 00 All other grades 13. Surfa Surface ce Condition Condition E q u a ti o n E = 2 8 .8 t + 9 .0 0 [ E = 1 .1 3 t + 9 . 0 0 ] E = 2 4 t + 7 .5 E = 3 2 t + 1 0 .0 0 [E = 1 .2 5 t + 1 0 .0 0 ] 13.1 All tubes shall be free of excessive excessive mill scale, suitable suitable forr in fo insp spect ectio ion. n. A sli sligh ghtt amo amoun untt of ox oxid idati ation on wi will ll no nott be considered as scale. Any special finish requirements shall be subject to agreement between the manufacturer and the purchaser. where: E    = elonga E  elongation tion in 2 in. or 50 mm, %. t  = actual thicknes thickness s of specimen, specimen, in. [mm]. 14. Mechanical Tests Tests Required 14.1   Tension Tests— One O ne tension test shall be made on a specimen for lots of not more than 50 tubes. Tension tests shall be made on specimens from two tubes for lots of more than 50 tubes. TABLE 5 Hardness Requirements. Grade TP405 ... TP410 TP429, TP430, and TP430 TI TP443 TP446-1 and TP446-2 TP409 TP439 ... TPXM-33 and TPXM-27 18CR-2Mo 29-4 and 29-4-2 26-3-3 25-4-4 ... 28-2-3.5 ... ... ... A B  UNS Designation Brinell Hardness, max Rockwell Hardness, B Scale, max S 4 05 00 S 4 08 0 0 S 4 10 00 S42900, S 43000, and S 43036 S 4 43 00 S 44 6 00 2 07 207 2 07 1 90 95 95 95 90 2 07 2 07 95 95 S 4 09 00 S43035A S 43 9 32 S 4 15 0 0 S44626 and S44627 S 4 4 40 0 S 4 47 0 0 an d S44800 S 4 46 6 0 S 4 46 3 5 S 4 47 3 5 S 32 8 03 S 4 09 7 7 S 4 39 4 0 S 4 20 3 5 2 07 1 90 1 90 295B  2 41 95 90 90 32 1 00 21 7 2 07 95 1 00 265 270 ... 2 40 180 180 180 25B  27B  1 00 1 00 88 88 88 14.2   Flaring Test (for Seamless Tubes)—  One test shall be made on specimens from one end of one tube from each lot of  finished tubes. The minimum expansion of the inside diameter shall be 10 %. For tubes over 8 in. [203.2 mm] in outside diamete dia meter, r, or tub tubes es wit with h wall thic thickne kness ss 3 ⁄ 8   in. [9.52 mm] and over, the flattening test may be performed instead of the flaring test unless the flaring test is specified in the purchase order. ubes)—  —   One test shall be 14.3   Flange Test (for Welded Tubes) made on specimens from one end of one tube from each lot of  finishe fini shed d tub tubes. es. For tub tubes es ove overr 8 in. [203.2 [203.2 mm] in out outsid sidee 3 diamete dia meter, r, or tub tubes es wit with h wall thic thickne kness ss  ⁄ 8   in. [9.52 mm] and over,, the flattening test may be performed instead of the flange over test unless the flange test is specified in the purchase order. 14.4   Hardness Brinell or Roc Rockwe kwell ll har hardne dness ss test testss Hardness Test— Brinell shall be made on specimens from two tubes from each lot. 14.5 Whe 14.5 When n mor moree tha than n one heat is inv involv olved, ed, the tension, tension, flaring,, flangin flaring flanging, g, and hardn hardness ess test requi requirements rements shall apply to each heat. Editorially corrected October 2000. Rockwell hardness, C scale. Flattening ing Test— For welded 14.6   Reverse Flatten welded tub tubes, es, one reverse flattening test shall be made on a specimen from each 1500 ft [450 m] of finished tubing. 12. Permissible Variations Variations in Dimensions 15. Intergranular Corrosion Corrosion Test Test 12.1 Varia 12.1 ariatio tions ns in out outsid sidee dia diamete meterr, wall wall thi thickn ckness, ess, and lengt len gth h fr from om th thos osee sp spec ecifi ified ed sh shall all no nott ex excee ceed d th thee am amou ount ntss prescribed prescr ibed in in Table  Table 6. 6. 15.1 If int 15.1 interg ergran ranula ularr cor corros rosion ion testing testing is specifi specified ed in the purcha pur chase se ord order er,, the test sha shall ll be mad madee in acco accorda rdance nce with 5 A268/A268M − 10 TABLE 6 Permissible Variations in Dimensions Size, Outside Diameter, in. [mm] Permissible Variations in Outside Diameter, in. [mm] Up to  ⁄ 2 [12.7], excl  ⁄ 2  to 11 ⁄ 2 [12.7 to 38.1], excl ±0.005 [0.13] ±0.005 [0.13] ±15 ± 10 1 3 11 ⁄ 2  to 31 ⁄ 2  [38.1 to 88.9], excl ±0.010 [0.25] ± 10 3 4 31 ⁄ 2  to 51 ⁄ 2  [88.9 to 139.7], excl ±0.015 [0.38] ± 10 3 5 51 ⁄ 2  to 8 [139.7 to 203.2], incl Group 1 2 1 1 Permissible Variations in Cut Permissible Length, in.B  [mm] Variations in Wall Thickness,A % Over Under Thin-Walled TubesC   ⁄ 8 [3]  ⁄ 8 [3] 0 0 ... l e s s th a n 0 .0 6 5 i n . [1 .6 m m ] nominal 16 [5]  ⁄ 16 0 l e s s th a n 0 .0 9 5 i n . [2 .4 m m ] 1 nominal 16 [5]  ⁄ 16 0 l e s s th a n 0 .1 5 0 i n . [3 .8 m m ] nominal ±0.030 [0.76] ± 10 16 [5]  ⁄ 16 3 0 l e s s th a n 0 .1 5 0 i n . [3 .8 m m ] nominal A When tubes as ordered require wall thicknesses 3 ⁄ 4 in. [19 mm] or over, or an inside diameter 60 % or less of the outside diameter, a wider variation in wall thickness is required. On such sizes a variation in wall thickness of 12.5 % over or under will be permitted. For tubes less than  1 ⁄ 2  in. [12.7 mm] in inside diameter which cannot be successfully drawn over a mandrel, the wall thickness may vary ±15 % from that specified. B  These tolerances apply to cut lengths up to and including 24 ft [7.3 m]. For lengths greater than 24 ft [7.3 m], the above over tolerances shall be increased by  1 ⁄ 8  in. [3 mm] for each 10 ft [3 m] or fraction thereof over 24 ft, or  1 ⁄ 2 in. [13 mm], whichever is lesser. C  Ovality provisions of 12.2 apply. 17. Pro Product duct Marking Marking Practices   A763, A763,  using samples prepared as agreed upon between the seller and the purchaser. 17.1 In addition to the markin marking g described in Specification A1016/A1016M, the marking shall indicate whether the tubing A1016/A1016M, is seamless or welded. 16. Hydrostatic or Nondestructive Nondestructive Electric Test Test 16.1 Each tube, 16.1 tube, seam seamles lesss or wel welded ded,, sha shall ll be sub subject jected ed to the nondestructive nondestructive electric test or the hydrostatic hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order. 18. Keyw Keywords ords 18.1 18. 1 fer ferriti riticc stai stainle nless ss stee steel; l; seam seamless less stee steell tub tube; e; stai stainle nless ss steel tube; steel tube; welded steel tube SUPPLEMENTARY REQUIREMENTS The following supplementary supplementary requirements requirements shall apply only when specified by the purchaser in the inquiry, contract, or order. S1. Pneumatic Test S2.1.1 Each tube shall be subjected to an ultrasonic ultrasonic inspection employ employing ing Practic Practices es   E273 or   E213   with the rej rejecti ection on criteria referenced in Specification A1016/A1016M Specification  A1016/A1016M.. S1.1 S1 .1 Th Thee tu tubi bing ng sh shall all be ex exam amin ined ed by a pn pneu euma matic tic tes testt (either air under water or pneumatic leak test) in accordance with Specification A1016/A1016M Specification  A1016/A1016M.. S2.1.2 If Practic Practicee   E273   is employed, a 100 % volumetric inspect insp ectio ion n of th thee en enti tire re len lengt gth h of ea each ch tu tube be sh shall all als also o be perfor per formed med usi using ng one of the non non-de -destr struct uctive ive elec electric tric tes tests ts permitted permit ted by Specifi Specification cation A1016/A1016M  A1016/A1016M.. S2. Additiona Additionall Testin esting g of Welde elded d Tubing for 100 % Join Jointt Effi Ef ficien ciency cy in Cert Certain ain ASME Appli Applicati cations ons (see   Note S2.1)) S2.1 S2.1.3 The test methods described in the suppl supplement ement may not be capable of inspecting the end portions of tubes. This condition is referred to as end effect. This portion, as determined by the manufacturer, shall be removed and discarded. NOTE  S2.1—When specified, the special testing in this supplement is intended intend ed for special ASME application applications. s. It is not mandatory for all ASME applications. S2.1 S2. 1 Whe Where re thi thiss sup supplem plement ent is spe specifi cified ed in the pur purcha chase se order, in certain ASME applications it is permissible to use 100 % joint efficiency for the longitudinal weld, provided the following additional requirements are met: S2.1.4 In addition to the marking prescribed in Specification A1016/A1016M,,“ S2” shall be added after the grade designaA1016/A1016M tion. 6 A268/A268M − 10 SUMMARY OF CHANGES Committ Com mittee ee A01 has ide identi ntified fied the loca locatio tion n of sele selected cted changes changes to thi thiss spe specific cificatio ation n sin since ce the las lastt issu issue, e, A268/A268M–05a, which may impact the use of this specification. (Approved April 1, 2010) (1) Revised Supplementary Requirement S1 to accommodate the two pneumatic test methods now defined in ASTM specifications. 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