bolt tightening sequence for flanges

BOLT TIGHTENING SEQUENCE FOR FLANGES

TIGHTENING SEQUENCECLOCKWISE BOLTING PATTERNS

8 1, 5, 3, 7, 2, 6, 4, 8

12 1, 5, 9, 3, 7, 11, 2, 6, 10, 4, 8, 12,

16 1, 9, 5, 13, 3, 11, 7, 15, 2, 10, 6, 14, 4, 12, 8, 16

201, 17, 9, 5, 13, 3, 19, 11, 7, 15, 2, 18, 10, 6, 14, 4, 20, 12, 8, 16

241, 17, 9, 5, 13, 21, 3, 19, 11, 7, 15, 23, 2, 18, 10, 6, 14, 22, 4, 20, 12, 8, 16, 24

281, 25, 17, 9, 5, 13, 21, 3, 27, 19, 11, 7, 15, 23, 2, 26, 18, 10, 6, 14, 22, 4, 28, 20, 20, 12, 8, 16, 24

321, 25, 17, 9, 5, 13, 21, 29, 3, 27, 19, 11, 7, 15, 23, 31, 2, 26, 18, 10, 6, 14, 22, 30, 4, 28, 20, 12, 8, 16, 24, 32

36

1, 33, 25, 17, 9, 5, 13, 21, 29, 3, 35, 27, 19, 11, 7, 15, 23, 31, 2, 34, 26, 18, 10, 6, 14, 22, 30, 4, 36, 28, 20, 12, 8, 16, 24, 32

 FLANGES WITH 40 BOLTS OR MORE MAY USE A BOLT PATTERN FOR HALFTHE NUMBER BOLTS AND TIGHTEN TWO BOLTS AT EACH NUMBER.

FOR EXAMPLE:40 BOLT FLANGE USE 20 BOLT PATTERN TIGHTENNING 2 SIDE BY SIDE BOLTS FOR EACH NUMBER.

401, 33, 25, 17, 9, 5, 13, 21, 29, 37, 3, 35, 27, 19, 11, 7, 15, 23, 31, 39, 2, 34, 26, 18, 10, 6,14, 22, 30, 38, 4, 36, 28, 20, 12, 8, 16, 24, 32, 40

441, 41, 33, 25, 17, 9, 5, 13, 21, 29, 37, 3, 43, 35, 27, 19, 11, 7, 15, 23, 31, 39, 2, 42, 34, 26,18, 10, 6, 14, 22, 30, 38, 4, 44, 36, 28, 20, 12, 8, 16, 24, 32, 40

481, 41, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 3, 43, 35, 27, 19, 11, 7, 15, 23, 31, 39, 47, 2, 42,34, 26, 18, 10, 6, 14, 22, 30, 38, 46, 4, 44, 36, 28, 20, 12, 8, 16, 24, 32, 40, 48

521, 49, 41, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 3, 51, 43, 35, 27, 19, 11, 7, 15, 23, 31, 39,47, 2, 50, 42, 34, 26, 18, 10, 6, 14, 22, 30, 38, 46, 4, 52, 44, 36, 28, 20, 12, 8, 16, 24, 32,40, 48

561, 49, 41, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 3, 51, 43, 35, 27, 19, 11, 7, 15, 23, 31,39, 47, 55, 2, 50, 42, 34, 26, 18, 10, 6, 14, 22, 30, 38, 46, 54, 4, 52, 44, 36, 28, 20, 12, 8,16, 24, 32, 40, 48, 56

601, 57, 49, 41, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 3, 59, 51, 43, 35, 27, 19, 11, 7, 15,23, 31, 39, 47, 55, 2, 58, 50, 42, 34, 26, 18, 10, 6, 14, 22, 30, 38, 46, 54, 4, 60, 52, 44, 36,28, 20, 12, 8, 16, 24, 32, 40, 48, 56

641, 57, 49, 41, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 61, 3, 59, 51, 43, 35, 27, 19, 11, 7,15, 23, 31, 39, 47, 55, 63, 2, 58, 50, 42, 34, 26, 18, 10, 6, 14, 22, 30, 38, 46, 54, 62, 4, 60,52, 44, 36, 28, 20, 12, 8, 16, 24, 32, 40, 48, 56, 64

681, 65, 57, 49, 41, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 61, 3, 67, 59, 51, 43, 35, 27, 19,11, 7, 15, 23, 31, 39, 47, 55, 63, 2, 66, 58, 50, 42, 34, 26, 18, 10, 6, 14, 22, 30, 38, 46, 54,62, 4, 68, 60, 52, 44, 36, 28, 20, 12, 8, 16, 24, 32, 40, 48, 56, 64,

721, 65, 57, 49, 41,33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 61, 69, 3, 67, 59, 51, 43, 35, 27,19, 11, 7, 15, 23, 31, 39, 47, 55, 63, 71, 2, 66, 58, 50, 42, 34, 26, 18, 10, 6, 14, 22, 30, 38,46, 54, 62, 70, 4, 68, 60, 52, 44, 36, 28, 20, 12, 8, 16, 24, 32, 40, 48, 56, 64, 72

761, 73, 65, 57, 49, 41, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 61, 69, 3, 75, 67, 59, 51, 43,35, 27, 19, 11, 7, 15, 23, 31, 39, 47, 55, 63, 71, 2, 74, 66, 58, 50, 42, 34, 26, 18, 10, 6, 14,22, 30, 38, 46, 54, 62, 70, 4, 73, 68, 60, 52, 44, 36, 28, 20, 12, 8, 16, 24, 32, 40, 48, 56,64, 72

801,  73, 65, 57, 49, 44, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 61, 69, 77, 3, 75, 67, 59, 51,43, 35, 27, 19, 11, 7, 16, 23, 31, 39, 47, 55, 63, 71, 79, 2, 74, 66, 58, 50, 42, 34, 26, 18,10, 6, 14, 22, 30, 38, 46, 54, 62, 70, 78, 4, 76, 68, 60, 52, 44, 36, 28, 20, 12, 8, 16, 24, 32,40, 48, 56, 64, 72, 80

841, 81, 73, 65, 57, 49, 44, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 61, 69, 77, 3, 83, 75, 67,59, 51, 43, 35, 27, 19, 11, 7, 15, 23, 31, 39, 47, 55, 63, 71, 79, 2, 82, 74, 66, 58, 50, 42,34, 26, 18, 10, 6, 14, 22, 30, 38, 46, 54, 62, 70, 78, 4, 84, 76, 66, 60, 52, 44, 36, 28, 20,12, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80

881, 81, 73, 65, 57, 49, 44, 33, 25, 17, 9, 5, 13, 21, 29, 37, 45, 53, 61, 69, 77, 85, 3, 83, 75,67, 59, 51, 43, 35, 27, 19, 11, 7, 15, 23, 31, 39, 47, 55, 63, 71, 79, 87, 2, 82, 74, 66, 58,50, 42, 34, 26, 18, 10, 6, 14, 22, 30, 38, 46, 54, 62, 70, 78, 86, 4, 84, 76, 68, 60, 52, 44,36, 28, 20, 12, 8, 16, 24, 32, 40, 8, 56, 64, 72, 80, 88