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
16
2
2
2
2
2
2
2
1.51
38
40.80
18
2
2
2
2
2
2
1-11/16
1.10
52
29.70
20
2
2
2
2
1-15/16 1-7/8
1-9/16
0.90
64
24.40
22
2
1-15/16 1-3/4
1-5/8
1-7/16 1-1/4
15/16
0.80
72
21.60
24
1-5/8
1-1/2
1-3/8
1-1/4
1-1/8
1
3/4
0.75
76
20.25
26
1-5/16 1-3/16 1-1/8
1
15/16
13/16
5/8
0.70
82
18.90
28
1-1/8
1
15/16
7/8
3/4
11/16
1/2
0.65
88
17.60
30
15/16
7/8
13/16
3/4
11/16
9/16
7/16
0.60
96
16.20
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
16 / 406.4 50.80
50.80 50.80
50.80
50.80
50.80
50.80
28.5
11.58
40.80
18 / 457.2 50.80
50.80 50.80
50.80
50.80
50.80
42.87
34.7
15.85
29.70
20 / 508 50.80
50.80 50.80
50.80
50.80
50.80
39.69
38.4
19.51
24.40
22 / 558.8 50.80
49.22 44.45
41.28
36.52
31.75
23.82
39.3
21.95
21.60
24 / 609.6 41.28
38.10 34.93
31.75
28.58
25.40
19.05
38.0
23.16
20.25
26 / 660.4 33.34
30.17 28.58
25.40
23.82
20.64
15.88
37.9
24.99
18.90
28 / 711.2 28.58
25.40 23.82
22.23
19.05
17.47
12.70
37.7
26.82
17.6
30 / 762 23.82
22.23 20.64
19.05
17.47
14.29
11.12
38.4
29.26
16.20
BENDING DATA
1,2,3,4,5 7,8,9,10