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
22
2
2
2
2
2
1-7/8
1-7/16
0.80
72
21.60
24
2
2
2
1-15/16 1-3/4
1-1/2
1-1/8
0.75
76
20.30
26
2
1-13/16 1-11/16 1-9/16
1-3/8
1-3/16
15/16
0.70
82
18.90
28
1-5/8
1-1/2
1-3/8
1-1/4
1-1/8
1
3/4
0.65
88
17.60
30
1-3/8
1-1/4
1-1/8
1-1/16
15/16
13/16
5/8
0.60
95
16.20
32
1-3/16 1-1/16 1
15/16
13/16
11/16
9/16
0.58
98
15.60
34
1
15/16 7/8
13/16
3/4
5/8
1/2
0.55
104
14.80
36
7/8
13/16 3/4
11/16
5/8
9/16
7/16
0.50
115
13.50
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
22 / 558.8 50.80
50.80 50.80
50.80
50.80
47.63
36.52
39.3
21.95
21.60
24 / 609.6 50.80
50.80 50.80
49.22
44.45
38.10
28.58
38.0
23.16
20.30
26 / 660.4 50.80
46.04 42.87
39.69
34.93
30.17
23.82
37.9
24.99
18.90
28 / 711.2 41.28
38.10 34.93
31.75
28.58
25.40
19.05
37.7
26.82
17.60
30 / 762 34.93
31.75 28.58
26.99
23.82
20.64
15.88
38.0
28.96
16.20
32 / 812.8 30.17
26.99 25.40
23.82
20.64
17.47
14.29
36.7
29.87
15.60
34 / 863.6 25.40
23.82 22.23
20.64
19.05
15.88
12.70
36.7
31.70
14.80
36 / 914.4 22.23
20.64 19.05
17.47
15.88
14.29
11.12
38.3
35.05
13.50
BENDING DATA
1,2,3,4,5 7,8,9,10