http://www.yaang.com e-mail: sales@yaang.com BS 393 : 1960 British Standard BS 393 : 1960 - Carbon Steel Pipe s (over 4 ches nomal size) for the Petroleum Industry, covers 1 lb to 600 lb weld neck and slip on flanges. Dimensions and Tolerances Tolerances on flange dimensions (BS 393 : 1960) Weld Neck and s (pages 8-56 to 8-59) Rg Jot Facg on Weld Neck and s (see below) Dimension Tolerance G (raised face diameter) ± 1 /64 ±0.40 C (flange thickness) + 3 /16, -0 +4.76, -0 D (overall length) ± 1 /8 ±3.18 E (outside diameter at weldg end weld neck hub) + 5 /3, - 1 /3 +3.97, -0.79 B (side diameter weld neck flange) + 1 /8, - 1 /16 +3.18, -1.59 B (side diameter slip on flange) + 1 /16, -0 +1.59, -0 L (depth groove) + 1 /64, -0 +0.40, -0 M (width groove) ±0.008 ±0.0 K (pitch diameter groove) ±0.005 ±0.13 Rg Jot Facgs - BS 393 Note - Values for mimum flange thickness, C, and overall length, D, are detailed the flange tables. - For rg jot tolerances see above. - R = 1 /16 (0.40 ) max, corner radius at bottom groove. Rg jot facg dimensions - BS 393 (lb) 1 300 400 600 Nomal (NPS) Groove/Rg m 6 6 6 R93 31 7 /8 809.6 8 8 8 R94 33 7 /8 860.4 30 30 30 R95 1 /8 917.6 3 3 3 R96 3 /4 984. R97 40 3 /4 R98 43 109. Pitch 9 31 Groove Depth Width 5 /3 5 /3 5 /3 9 /3 3.0 9 /3 3.0 9 /3 3.0 300 lb 98 70 0 333 41 6 5 45 5 49 595 548 Weight 400 lb 9 304 409 4 5 419 539 48 608 540 689 61 600 lb 4 417 518 48 570 5 697 6 735 670 800 764 Note 8-55
Weld Neck and s - BS 393 1 lb Pipe Data Data Drillg Data Radius Weight Nomal 6 8 97.1 30 3 /4 984. 3 41 3 /4 1060.4 43 3 /4 1111. 48 3 /4 1. 40 3 /4 4 189.0 53 13. 44 55 1403.3 57 1454. 48 59 1511.1 90.7 4 1073. 44 113.9 1174.7 48 15.5 1 /16 5.4 1 /8 57.1 58.7 63.5 5 /8 5 /8 11 /16 68.3 3 /4 69.9 5 3 17.0 85.7 5 1 /16 3 18.6 87.3 5 1 /8 3 130. 88.9 5 3 5 /8 133.3 9.1 5 3 11 /16 1.9 93.7 5 3 3 /4 1.5 95. 5 3 3 /4 1.5 95. 5 3 7 /8 139.7 98.4 5 5 /8 4 14.9 101.6 5 5 /8 4 14.9 101.6 5 11 /16 4 1 /16 144.5 103. 5 3 /4 4 1 /8 1.1 104.8 6 660.4 8 711. 30 76.0 3 81.8 863.6 40 1016.0 4 1066.8 44 1117.6 48 119. / 8 73.9 30 3 /4 781.0 3 3 /4 831.8 35 889.0 41 3 /4 1060.4 43 3 /4 1111. 48 119. 170.0 5 1. 9 74.9 31 793.7 35 3 /4 908.0 3 /4 958.8 4 1073.1 44 113.9 47 49 144.6 51 195.4 53 1358.9 s 4 1.9 8 1.9 8 1.9 8 1 5 /8 3 1 5 /8 3 1 5 /8 3 1 5 /8 1 5 /8 1 5 /8 40 1 5 /8 40 1 5 /8 44 1 5 /8 31 3 /4 806.4 863.6 977.9 40 108.7 4 3 /4 1085.8 45 47 100.1 49 157.3 51 3 /4 1314.4 53 3 /4 15. 56 14.4 118 107 1 1 153 1 190 170 1 184 4 11 84 49 311 7 358 313 6 331 399 9 440 1 - For weld neck flanges, dimension B is to be specified by the purchaser. It corresponds to the pipe side diameter. - For slip on flanges, the hub may be cyldrical or have a draft < 7 on the outside surface. - = Weld Neck. - For rg jot facgs see page 8-55. 8-56
Weld Neck and s - BS 393 300 lb Pipe Data Data Drillg Data Radius Weight Nomal 6 8 40 3 /4 30 43 109. 3 45 47 106.5 170.0 90.7 3 1 /8 79.4 3 85.7 3 5 /8 9.1 3 7 /8 98.4 4 101.6 4 1 /8 104.8 / 7 184.1 7 3 /4 196.8 8 09.5 8 3 /4. 9 1 /8 31.8 9 717.5 871.5 9.3 End 7 1 /16 687.4 9 1 /8 739.7 31 3 /16 79. 33 844.6 35 896.9 949.3 8 70.7 30 774.7 3 87. 11 /16 881.1 7 /8 9.6 39 990.6 9 31 s 8 1 3 /4 44.4 8 1 3 /4 44.4 8 1 7 /8 47.6 8 8 3 1 /8 876.3 41 1054.1 43 1104.9 79 51 0 313 390 354 435 395 4 0 560 513 - For weld neck flanges, dimension B is to be specified by the purchaser. It corresponds to the pipe side diameter. - For slip on flanges, the hub may be cyldrical or have a draft < 7 on the outside surface. - = Weld Neck. - For rg jot facgs see page 8-55. 8-57
Weld Neck and s - BS 393 400 lb Pipe Data Data Drillg Data Radius Weight Nomal 6 8 40 3 /4 30 43 109. 3 45 47 106.5 170.0 90.8 3 88.9 3 3 /4 95. 4 101.6 4 107.9 4 111.1 4 1 / 7 5 /8 193.7 8 1 /8 06.4 8 5 /8 19.1 9 1 /8 31.8 9 9 7 /8 6 668.3 8 719.1 30 769.6 3 8.3 873.1 95.5 End 7 693.7 9 7.1 31 33 85.5 35 5 /8 904.9 3 /4 958.8 8 5 /8 77.1 30 13 /16 78.6 3 1 8.6 35 889.0 3 /16 944.6 39 7 /8 101.9 9 31 s 8 1 7 /8 47.6 8 3 1 /8 876.3 41 1054.1 43 1104.9 14.9 14.9 0 95 399 354 454 408 5 5 590 5 669 601 - For weld neck flanges, dimension B is to be specified by the purchaser. It corresponds to the pipe side diameter. - For slip on flanges, the hub may be cyldrical or have a draft < 7 on the outside surface. - = Weld Neck. - For rg jot facgs see page 8-55. 8-58
Weld Neck and s - BS 393 600 lb Pipe Data Data Drillg Data Radius Weight Nomal 6 40 1016.0 8 4 1073.1 30 44 1130.3 3 47 49 144.6 51 3 /4 1314.4 90.7 4 107.9 4 111.1 4 1 4 5 /8 117.5 4 3 /4 10.6 4 7 /8 13.8 / Lend 8 3 /4 6 713 /16. 671.5 706.4 9 8 9 1.9 73.9 760.4 9 3 /4 30 3 1 /16 47.6 774.7 814.4 10 3 3 /16 85.5 868.4 10 5 /8 69.9 877.9 9.3 11 1 /8 8.6 98.7 976.3 9 747.7 31 5 /8 803.3 33 1 86.0 1 /8 917.6 973.1 40 5 /8 1031.9 9 31 s 8 8 8 8 5 /8 4 1079.5 44 1130.3 47 14.9 5 /8 15.88 11 /16 17. 11 /16 17. 3 /4 19.05 3 /4 19.05 4 408 8 47 559 56 680 605 717 65 780 744 - For weld neck flanges, dimension B is to be specified by the purchaser. It corresponds to the pipe side diameter. - For slip on flanges, the hub may be cyldrical or have a draft < 7 on the outside surface. - = Weld Neck. - For rg jot facgs see page 8-55. 8-59