Bend Radius for API 5L Pipe

[Gasman1440]

I am looking to calculate the bend radius of a API 5L fitting. Are you aware of charts or a simple method to calulate this? I need to run an internal inspection device in a pipe and it will only pass a 3D bend.

 

[BigInch]

D is diameter.

1.5 D Bend has a centerline radius of 1.5 * pipe diameter,
so the 1.5D radius for 12" diameter pipe is 18",

3 D is 3 x Diameter, centerline radius for a 36" pipe is 9 feet.

For field or non-standard bends made from pipe, see ASME B31.4 Section 406.2

406.2.1 Bends made from Pipe

Cold Bends

Diameter Minimum Radius
<= 12" 18xD
14" 21xD
18" 27xD
>= 20" 30xD

Most large diameter (>=24"D) field bends are typically done at 1º change in direction in each length of 1 Diameter. (leave 1 diameter of straight length at each end of all pipes used to make the bend.)




BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com

 

[STYMIEDPIPER]

If you require additional technical information consider calling Bendtec Inc located in Duluth Minnesota. I looked at there web site and did not see link for engineering. Many years ago they use to publish bending engineering data for designers.

 

[BigInch]

see Weldbend.

BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com