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Laying Out a Segment Bend (cont'd)
Developed Length
Formula for Any Bend
developed length = 0.01744 x degree of bend x bending radius
0
0
0
10
15.70
20
31.40
30
47.10
40
62.80
50
87.50
60
94.20
70
109.90
80
125.60
90
141.30
To use this table: Determine the developed length by finding the intersection of the appropriate row ("tens" digit of
the radius) and appropriate column ("ones" digit of the radius).
Example:
Find the appropriate row:
Find the appropriate column:
Find the Developed Length
at that intersection:
To Locate the Center of a 90˚ Bend
TO BOTTOM OF PIPE
Measure and mark the length of the stub. Subtract the
radius of the bend and 1/2 of the O.D of the pipe. Add
1/2 of the developed length.
Example:
Developed Length:
1/2 of Developed Length:
Center Mark:
48.92'
Greenlee Tools, Inc.
Developed Length Table
RADIUS - Increments by Ones
1
2
3
1.57
3.14
4.71
17.27
14.84
20.41
32.97
34.54
36.11
48.67
50.24
51.81
64.37
65.94
67.50
80.07
81.64
83.21
95.77
97.34
98.91
111.47
113.04
114.61
127.17
128.74
130.31
142.87
144.44
146.01
radius is 46 inches
row labeled "40"
column labeled "6"
72.22
60" stub 46" radius 90˚ bend
0.01744 x 90 x 46 = 72.2
72.2 x 1/2 = 36.1
60 – 46 – 1.18 + 36.1 = 48.92
CENTER BENDING MARK
880 Hydraulic Bender
4
5
6
6.28
7.85
9.42
21.98
23.85
25.12
37.68
39.25
40.82
53.38
54.95
56.52
69.03
70.65
72.22
84.78
86.35
87.92
100.48
102.05
103.62
116.18
117.75
119.32
131.88
133.45
135.02
147.58
149.15
150.72
11
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
7
8
9
10.99
12.56
14.13
26.69
28.26
29.83
42.39
43.96
45.53
58.09
59.66
61.23
73.79
75.36
76.93
89.49
91.06
92.63
105.19
106.76
108.33
120.89
122.46
124.03
136.59
138.16
139.73
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