U.S.
Pipe O.D.
Maximum Wall Thickness By Grade (Inch)
Recommended Bend
inch
X52
X56
X60
X65
X70
X80
X100
Degree per
Radius
Max Degree
Arc Foot
Feet
Per 40 Feet
32
2
2
2
2
2
1-3/4
1-5/16
0.58
99
14.50
34
2
2
2
1-7/8
1-3/4
1-1/2
1-1/8
0.55
104
13.75
36
2
1-15/16 1-3/4
1-5/8
1-1/2
1-5/16
1
0.50
115
12.50
38
1-13/16 1-11/16 1-9/16 1-7/16
1-5/16 1-1/8
7/8
0.50
115
12.50
40
1-5/8
1-1/2
1-3/8
1-1/4
1-1/8
1
13/16
0.50
115
12.50
42
1-7/16 1-5/16 1-3/16 1-1/8
1
7/8
11/16
0.50
115
12.50
METRIC
Pipe O.D.
Maximum Wall Thickness By Grade (Inch)
Recommended Bend
inch/mm X52
X56
X60
X65
X70
X80
X100
Ratio
Radius
Max Degree
Radius: O.D.
Meter
Per 12 Meters
32 / 812.8 50.80
50.80 50.80
50.80
50.80
44.45
33.34
37.1
30.18
14.50
34 / 863.6 50.80
50.80 50.80
47.63
44.45
38.10
28.58
36.7
31.70
13.75
36 / 914.4 50.80
49.22 44.45
41.28
38.10
33.34
25.40
38.4
35.05
12.50
38 / 965.2 46.04
42.87 39.69
36.52
33.34
28.58
22.23
36.3
35.05
12.50
40 / 1016 41.28
38.10 34.93
31.75
28.58
25.40
20.64
34.5
35.05
12.50
42 / 1066.8 36.52
33.34 30.17
28.58
25.40
22.23
17.47
32.9
35.05
12.50
BENDING DATA
1,2,3,4,5 7,8,9,10