1、Weld preparation Inside diameters of seamless stainless steel pipes In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. DIN - 2559-4 Dimensions in mm d, 1 Scope and field of appli
2、cation This standard illustrates how to calculate the inside diameters required to make seamless steel pipes in compliance with DIN 2462-1 match and form grooves shaped as specified in DIN 2559-1 suitable for one-sided welding. It is to be used for butt-welding pipes supplied by different manufactur
3、ers which have the same nominal diameter but differ in their actual dimensions, and may be applied as appropriate to other cylindrical hollow bodies. Limit deviations 2 Dimensions The matching inside diameter, d, as a function of the nominal wall thickness, t (cf. figures 1 and 2) shall be calculate
4、d using the formulae numbered 1 through 23 in tables 2 to 6, which are based on the following equation: Matching inside diameters which are subject to the limit deviations specified in table 1 are given in tables 7 to 10 as a function of the pipe outside diameter. dp = da iniii - 2 x min Formula No.
5、 1 2 3 4 Pipe outside Nominal wall Formula) used IS0 tolerance class2) diameter, da thickness, t*) to calculate d, da t Up to 48,3 Up to 1,6 da - 0,5 - 2(t - 0,2) Up to 48,3 2 to 11 da - 0,5 - 1,8 t 51 to 219,l Up to 1,6 0,99 da - 2(t - 0,2) 51 to 219,l D2: * 1 %; T3: * 1 %; 0,5 min. 0,2 min. 2 to 1
6、4,2 0,99 da - 1,8 t I Upto120 I Over 120 up to 320 Over 320 Table 2: Cold formed pipes with standard tolerances for da not exceeding 219,l mm I I I I I Rele- vant table 7 l) The values used in the formulae are based on the tolerances for pipe outside diameters and wall thicknesses specified in DIN 2
7、462-1. The values specified for d, in tables 7 to 10 have been specified to the nearest 0,5 or 1 millimetre. *) Taken from DIN 2462-1. Continued on pages 2 to 7. !uth Verlag GmbH, Berlin, hac the exclusive right of cale for German Standards (DIN-Normen). DIN 2559-4 Eng/. Price group 09.96 Sales No.
8、O107 Page2 DIN 2559-4 Formula No. 13 14 15 16 Table 3 Cold formed pipes subject to closer tolerances for da not exceeding 219,l mm Pipe outside Nominal wall Formula) used IS0 tolerance class) diameter, da thickness, t to calculate d, da t 44,5 to 48,3 Up to 3,6 da - 0,75 - 2(t - 0,6) 44,5 to 48,3 4
9、to 11 da - 0,75 - 1,7 t 51 to 21 9,l Up to 3,6 0,985 da - 2(t - 0,6) 51 to 21 9,l 4 to 14,2 0,985 d, - 1,7 t D1: *1,5%; T1: *15%; I0,75 min. I0,60 min. Nominal wall For ) and ), see table 2. Formula No. 17 18 19 20 Rele- vant table Pipe outside Nominal wall Formula) used IS0 tolerance class) diamete
10、r, da thickness, t to calculate d, t da 44,5 to 48,3 Up to 2,9 da - 0,5 - 2(t - 0,4) 44,5 to 48,3 3,2 to 11 da - 0,5 - 1,75 t 51 to 21 9,l Up to 2,9 0,99 d, - 2(t - 0,4) 51 to 21 9,l 3,2 to 14,2 0,99 da - 1,75 t D2: * 1 %; I0,50 min. I0,40 min. T2: * 123%; 3, Use the given formulae to calculate spec
11、ial sizes. The values given for d, have been given to the nearest half or whole millimetre. Table 4: Hot reduced pipes subject to standard tolerances for d, between 44,5 mm and 219,l mm Rele- vant table 8 Table 5: Hot reduced pipes subject to closer tolerances for d, above 4,5 mm Up to 219,l mm Rele
12、- vant table DIN 2559-4 Page3 Formula No. 21 22 23 Table 6: Hot reduced pipes subject to standard tolerances for da above 219,l mm Up to 610 mm Pipe outside Nominal wall Formula) used ISO tolerance ciass2) diameter, da4) thickness, t4) to calculate d, vant t table da - 9 D1: I1,5%; +22,5%; * 0,75 mi
13、n. - 15 % min, D1: I1,5%; T1: I15%; f 0,75 min. f 0,60 min. D1: k 13 %; T2: k 12,5 %; f 0,75 min. f 0,4 min. 219,l to 610 Up to 14,25) 0,985 da - 1,7 t 9 0,985 d, - 1,7 t 219,l to 610 219,l to 610 Up to 14,26) Up to 14,27) 0,985 d, - 1,7 t For l) and 2), see table 2. 4, Refer to DIN 2448 when orderi
14、ng larger diameters and wall thicknesses not covered by DIN 2462-1. 5, t less or equal to 0,05 da. 6, t above 0,05 d, up to 0,09 d,. 7, t greater than 0,09 da. The shapes and dimensions of grooves shall be in compliance with DIN 2559-1. Examples are illustrated below. Figure 1: DIN 2559-21 groove (a
15、fter matching pipes) Figure 2: DIN 2559-4 groove (after matching pipes) 3 Designation The designation for a DIN 2559-21 groove, formed by the matching ends of pipes with an outside diameter, da, of 32 mm and a nominal wall thickness, t, of 2,9 mm, d, having been brought to 26 mm in accordance with t
16、able 7, shall read: Groove DIN 2559-21-32-26 4 Matching of pipe ends 4.1 The pipe ends may be formed in a non-cutting process or by machining. Machined internal faces shall be smooth and have a ten point height of irregularities, R, not exceeding 100 pm. 4.2 The internal faces need not be machined i
17、f the actual inside diameter is equal to or greater than d, nor if the misalign- ment of pipe ends, e, does not exceed the permissible dimensions (ci. subclause 4.4). 4.3 If the pipes to be welded have differing inside diameters, the larger diameter may be taken as diameter dp, provided the walls of
18、 both pipes can be bevelled to form an appropriate groove. I) Cf. subclause 4.2. Page4 DIN 2559-4 4.4 Within the range defined by DIN EN 25817, misalignment of the pipe ends, as illustrated by e in figures 3 and 4, is permitted. 4.5 Where the requirements specified in subclauses 4.3 and 4.4 are not
19、met, pipe ends may be prepared for welding (by bevelling, expanding or surfacing, or by providing a suitable transition). Dimension t, represents the design wall thickness. Left-hand inside diameter (di) has been matched. Figure 3: Example of misalignment Inside diameters (di) have not been matched.
20、 Figure 4: Example of misalignment For I), see page 3. DIN 2559-4 Page5 Table 7: Matching inside diameter, d, for cold formed pipes for da up to 219,i mm ipe outside diameter, da 6 8 10 10,2 12 13,5 14 16 17,2 18 19 20 21,3 22 25 25,4 26,9 30 31 ,8 32 33,7 35 38 40 42,4 445 483 51 54 57 60,3 63,5 70
21、 76,l 82,5 88,9 101,8 114,3 139,7 168,3 219,l Il d, for a nominal wall thickness, f, of 3,6 4,O 1 9,0 8,O 10,o 93 11,o 10,o 12,o ll,o 13,O 12,O 14,O 13,5 15,O 14,O 18,O 17,O 18,O 17,5 19,5 19.0 23,O 22,O 24.5 24,O 25,O 24,O 26.5 26.0 28,O 27,O 31.0 30,O 33.0 32,O 35.0 34.5 375 36,5 41,O 40,5 44,O 43
22、,O 46,5 46,O 49,5 49.0 53.0 52.0 56.0 555 62,5 62,O 68,5 68,O 75,O 74,O 81,5 80,5 94,O 93,O 106,5 105,5 131,o 4,5 I 5.0 I 5,6 1 6,3 I 7,1 I 8,O I 8,8 I10,O I 11,O 1123 1 1 1 1 1 1 1 1 1 1 Page6 DIN 2559-4 da 44,5 48,3 51 54 57 603 3,5 70 78,l 82.5 88,9 101,6 114,3 139,7 168,3 219,l Table 8: Matching
23、 inside diameter, d, for hot reduced pipes for da from 4,5 mm to 219,l mm 1,0 1,2 1,6 2,O 2,3 2,6 2,9 3,2 3,6 4,O 4,5 5,O 5,6 6,3 7s 8,O 8,8 10,O 11,O 12,5 14,2 42,5 42.5 41,5 40,5 40,O 39,5 39.0 38,5 37,5 36,5 36,O 35,O 34,O 33,O 31,5 30,O 28,5 26,5 25,O 46,5 46,O 45.5 44,5 44,O 43,5 42.5 42,O 41,5
24、 40.5 39,5 39,O 38,O 365 35,O 33,5 32.5 30,5 28,5 49,O 49,O 48,O 47,O 46,5 46,O 455 45,O 44,O 43,O 42,5 41,5 39,5 38,O 36.5 35,O 33,O 31,5 28,5 52,O 51,5 51,O 50,O 50,O 49,O 48,5 47,5 47,O 46,O 45,5 44,5 42,O 41.0 39,5 38,O 36,O 34,O 31,5 55,O 54,5 54.0 53,O 525 52,O 51,5 50,5 50,O 49.0 48,O 47,5 45
25、0 44,O 42.5 41,O 39,O 37,O 34,5 32.0 58,5 58,O 57,O 56,5 56,O 55,O 54,5 54,O 53,O 52,5 51,5 50,5 48,5 47.0 45,5 44,O 42,O 40,5 38,O 35,O 61,5 61,O 60,5 59,5 59,O 58,5 57,5 57,O 56,5 55,5 54,5 54,O 513 50.0 48.5 47,5 45,5 43,5 41,O 38,O 66,5 66,O 66,O 643 64,O 633 62,5 62,O 61,O 60,O 58,O 565 55,O 53
26、,5 51,5 50,O 473 44,5 72,5 72,O 72,O 70,5 70,O 69,5 88,5 68,O 67,O 66,O 64,O 62.5 61,O 59,5 57,5 56,O 533 50,5 79,O 78,O 77,5 77,O 76,5 76,O 75,O 74,O 73,5 72,5 70,5 69,O 67,5 66,O 64,O 62,5 60,O 57,O 84,5 84,O 83,5 82,5 82.0 81,5 80,5 79,5 79,O 76,5 75,O 733 72,5 70,5 68,5 66,O 63,O 97,O 97,O 96,O
27、95,O 94.5 94,O 93,O 92,O 913 89,O 88,O 86,O 85,O 83,O 81,O 78,5 755 108,5 107,5 107,O 106,5 105,5 104,5 104,O 101,5 100,5 98,5 97,5 95,5 93,5 91,O 88,O 88, 130.5 129,5 129,O 126,5 125.5 124,O 122,5 120,5 118,5 116,O 113,O 113, 152,O 150,5 148,5 147,O 144,5 141,5 141,! 200,5 198,5 197,O 194,5 191,5 1
28、91,! Pipe outside diameter, Pipe outside diameter, da 21 9,l 273 323,9 355,6 4064 d, for a nominal wall thickness, t, of d, for a nominal wall thickness, t, of 84 8,8 10,o ll,o 12,5 14,2 202,O 200,5 198,5 197,O 194,5 191,5 253,5 251,5 250,O 247,5 244,5 302,O 300,O 297,5 294,5 331,5 329,O 326,O 376,O
29、 Pipe outside diameter, da 219,l 273 3239 355,6 406,4 Table 9: Matching inside diameter, d, for hot reduced pipes for da above 219,l up to 406,4 mm) d, for a nominal wall thickness, t, of 8,O 8,s 10,o 1 l,o 12,5 14,2 201,5 200,O 198,O 196,5 193,5 190,5 253,5 251,O 249,5 247,O 244,O 301,5 299,5 297,O
30、 294,O 331,O 328,O 325,O 375,O Table 10: Matching inside diameter, d, for hot reduced pipes for da above 219,l up to 406,4 mm2) *) Use formula 23 to calculate d,. DIN 2559-4 Page7 Standards referred to DIN 2448 Seamless steel pipes and tubes; dimensions and mass per unit length DIN 2462-1 Seamless s
31、tainless steel tubes; dimensions and mass per unit length DIN 2559-1 Weld preparation; guidelines for groove shapes; fusion welded butt joints on steel tubes DIN EN 25817 Arc-welded joints in steel; guidance on quality levels for imperfections (IS0 5817:1992) Other relevant standards DIN 17458 IS0 5252:1991 Seamless circular austenitic stainless steel tubes subject to special requirements; technical delivery con- ditions Steel tubes; tolerance systems
