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
6
2
2
2
2
2
2
2
4.41
13
132.30
8
2
2
2
2
2
2
2
3.82
15
114.60
10
2
2
2
2
2
2
2
2.86
20
85.80
12
2
2
2
2
2
2
1-7/16
2.30
25
69.00
14
2
2
1-3/4
1-5/8
1-7/16 1-3/16
7/8
1.70
34
51.00
16
1-3/8
1-1/4
1-1/8
1-1/16
15/16
13/16
5/8
1.51
38
45.30
18
1
7/8
13/16
3/4
11/16
9/16
7/16
1.10
52
33.00
20
3/4
11/16 5/8
9/16
1/2
7/16
3/8
0.83
69
24.90
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
6 / 168
50.80
50.80 50.80
50.80
50.80
50.80
50.80
4.41
13
132.30
8 / 219
50.80
50.80 50.80
50.80
50.80
50.80
50.80
3.82
15
114.60
10 / 273 50.80
50.80 50.80
50.80
50.80
50.80
50.80
2.86
20
85.80
12 / 324 50.80
50.80 50.80
50.80
50.80
50.80
36.52
2.30
25
69.00
14 / 355.6 50.80
50.80 44.45
41.28
36.52
30.17
22.23
29.1
10.36
51.00
16 / 406.4 34.93
31.75 28.58
26.99
23.82
20.64
15.88
28.5
11.58
45.30
18 / 457.2 25.40
22.23 20.64
19.05
17.47
14.29
11.12
34.7
15.85
33.00
20 / 508 19.05
17.47 15.88
14.29
12.70
11.12
9.53
41.4
21.03
24.90
BENDING DATA
1,2,3,4,5 7,8,9,10