Flange Bolting Chart

150 LB. Flanges300 LB. Flanges600 LB. Flanges
Nominal Pipe Size# Bolts or StudsDia of Bolts or StudsLength of Stud# Bolts or StudsDia of Bolts or StudsLength of Stud# Bolts or StudsDia of Bolts or StudsLength of Stud
1/16 RFRTJ1/16 RFRTJ1/4 RFRTJ
1/240.502-1/440.502-1/2340.5033
3/440.502-1/240.6333-1/240.633-1/23-1/2
140.502-1/2340.6333-1/240.633-1/23-1/2
1-1/440.502-3/43-1/440.633-1/43-3/440.633-3/43-3/4
1-1/240.502-3/43-1/440.753-1/2440.754-1/44-1/4
240.633-1/43-3/480.633-1/2480.634-1/44-1/4
2-1/240.633-1/2480.7544-1/280.754-3/44-3/4
340.633-1/2480.754-1/44-3/480.7555
3-1/280.633-1/2480.754-1/4580.885-1/25-1/2
480.633-1/2480.754-1/2580.885-3/45-3/4
580.753-3/44-1/480.754-3/45-1/481.006-1/26-1/2
680.7544-1/2120.754-3/45-1/2121.006-3/46-3/4
880.754-1/44-3/4120.885-1/26121.137-1/27-3/4
10120.884-1/25161.006-1/46-3/4161.258-1/28-1/2
12120.884-3/45-1/4161.136-3/47-1/4201.258-3/48-3/4
14121.005-1/45-3/4201.1377-1/2201.389-1/49-1/4
16161.005-1/45-3/4201.257-1/28201.501010
18161.135-3/46-1/4241.257-3/48-1/4201.6310-3/410-3/4
20201.136-1/46-3/4241.2588-3/4241.6311-1/411-1/2
24201.256-3/47-1/4241.50910241.881313-1/4
900 LB. Flanges1500 LB. Flanges2500 LB. Flanges
Nominal Pipe Size# Bolts or StudsDia of Bolts or StudsLength of Stud# Bolts or StudsDia of Bolts or StudsLength of Stud# Bolts or StudsDia of Bolts or StudsLength of Stud
1/4 RFRTJ1/4 RFRTJ1/4 RFRTJ
1/240.754-1/44-1/440.754-1/44-1/440.754-3/44-3/4
3/440.754-1/24-1/240.754-1/24-1/240.7555
140.885540.885540.885-1/25-1/2
1-1/440.885540.885541.0066
1-1/241.005-1/25-1/241.005-1/25-1/241.136-3/46-3/4
280.885-3/45-3/480.885-3/45-3/481.0077
2-1/281.006-1/46-1/481.006-1/46-1/481.137-3/48
380.885-3/45-3/481.137781.258-3/49
481.136-3/46-3/481.257-3/47-3/481.501010-1/4
581.257-1/27-1/281.509-3/49-3/481.7511-3/412-1/4
6121.137-1/27-3/4121.3810-1/410-1/282.0013-1/214
8121.388-3/48-3/4121.6311-1/211-3/4122.001515-1/2
10161.389-1/49-1/4121.8813-1/413-1/2122.5019-1/420
12201.381010162.0014-3/415-1/4122.7521-1/422
14201.5010-3/411162.251616-3/4
16201.6311-1/411-1/2162.5017-1/218-1/2
18201.8812-3/413-1/4162.7519-1/220-3/4
20202.0013-3/414-1/4163.0021-1/422-1/4
24202.5017-1/418163.5024-1/425-1/2

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