Technical Info

Class 150 Steel Pipe Flange Bolt Pattern & Bolt Length

class 150 steel pipe flanges

Pipe Size 150 BOLTING PATTERN & BOLT LENGTHS
Outside Dia.of Flange Dia. ofBolt Circle Dia. ofBolt Holes Numberof Bolts Dia.of Bolts Length Machine Bolts Length Stud Bolts
0.006 inRaised Face 0.006 inRaised Face
1/2 3.50 2.38 0.62 4 1/2 1.75 2.25
3/4 3.88 2.75 0.62 4 1/2 2.00 2.25
1 4.25 3.12 0.62 4 1/2 2.00 2.50
1 1/4 4.62 3.50 0.62 4 1/2 2.25 2.50
1 1/2 5.00 3.88 0.62 4 1/2 2.25 2.75
2 6.00 4.75 0.75 4 5/8 2.75 3.00
2 1/2 7.00 5.50 0.75 4 5/8 3.00 3.75
3 7.50 6.00 0.75 4 5/8 3.00 3.50
3 1/2 8.50 7.00 0.75 8 5/8 3.00 3.00
4 9.00 7.50 0.75 8 5/8 3.00 3.50
5 10.00 8.50 0.88 8 3/4 3.25 3.75
6 11.00 9.50 0.88 8 3/4 3.25 3.75
8 13.50 11.75 0.88 8 3/4 3.50 4.00
10 16.00 14.25 1.00 12 7/8 3.75 4.50
12 19.00 17.00 1.00 12 7/8 4.00 4.50
14 21.00 18.75 1.12 12 1 4.25 5.00
16 23.50 21.25 1.12 16 1 4.50 5.25
18 25.00 22.75 1.25 16 1 1/8 4.75 5.75
20 27.50 25.00 1.25 20 1 1/8 5.25 6.00
24 32.00 29.50 1.38 20 1 1/4 5.75 6.75
30 38.75 36.00 1.38 28 1 1/4 - -
36 46.00 42.75 1.62 32 1 1/2 - -
42 53.00 49.50 1.62 36 1 1/2 - -
48 59.50 56.00 1.62 44 1 1/2 - -

Class 300 Steel Pipe Flange Bolt Pattern & Bolt Length

class 300 flanges

Pipe Size 300 BOLTING PATTERN AND BOLT LENGTHS
OutsideDia.of Flange Dia. ofBolt Circle Dia. ofBolt Holes Number ofBolts Dia. ofBolts Machine Bolts Stud Bolts
0.006 inRaised Face 0.006 inRaised Face
1/2 3.75 2.62 0.62 4 1/2 2.25 2.75
3/4 4.62 3.25 0.75 4 5/8 2.50 3.00
1 4.88 3.50 0.75 4 5/8 2.75 3.25
1 1/4 5.25 3.88 0.75 4 5/8 2.75 3.25
1 1/2 6.12 4.50 0.88 4 3/4 3.00 3.75
2 6.50 5.00 0.75 8 5/8 3.00 3.50
2 1/2 7.50 5.88 0.88 8 3/4 3.50 4.00
3 8.25 6.62 0.88 8 3/4 3.75 4.25
3 1/2 9.00 7.25 0.88 8 3/4 3.75 4.50
4 10.00 7.88 0.88 8 3/4 4.00 4.50
5 11.00 9.25 0.88 8 3/4 4.25 4.75
6 12.50 10.62 0.88 12 3/4 4.25 5.00
8 15.00 13.00 1.00 12 7/8 4.75 5.50
10 17.50 15.25 1.12 16 1.00 5.50 6.25
12 20.50 17.75 1.25 16 1  1/8 6.00 6.75
14 23.00 20.25 1.25 20 1  1/8 6.25 7.00
16 25.50 22.50 1.38 20 1   1/4 6.50 7.50
18 28.00 24.75 1.38 24 1   1/4 6.75 7.75
20 30.50 27.00 1.38 24 1  1/4 7.25 8.25
24 36.00 32.00 1.62 24 1  1/2 8.00 9.25
30 43.00 39.25 1.88 28 1  3/4 - -
36 50.00 46.00 2.12 32 2 - -
42 50.75 47.50 1.75 32 1  5/8 - -
48 57.75 54.00 2.00 32 1  7/8 - -

ROLL GROOVE SPECIFICATION

Gruvlok_Catalog

CUT GROOVE SPECIFICATION

Cut Groove Spec

INSTALLATIONS