PIPE BENDS

[JOHNMCC]

CAN SOMEONE DIRECT ME TO A CHART OR JUST SOME GOOD INFORMATION ON MIN. BEND RADIUS' OF STD STEEL PIPE, SUCH
AS MIN RADIUS FOR A 2.5" SCH 40 PIPE?
THANX,
JOHN McCLELLAND

 

[butelja]

If you are talking about standard buttwelded fittings, the normal radiuses are 1D, 1.5D, and 3D, where D is the nominal pipe diameter. If you are talking about bending pipe to form bends, then 3D is about the minimum practical bending radius.

 

[sudhik]

KINDLY REFER ASME B16.9 FOR LONG RADIUS ELBOWS AND ASME B16.28 FOR SHORT RADIUS ELBOWS (i.e 1D ELBOWS) FOR STANDARD BUTTWELDING FITTINGS.

 

[PAN]

For pipe bend, minimum bend radius should be 5 x the nominal pipe size.

Wall thinning from bending should be considered as the reply of butelja in "Wall thinning and MAWP for bent tubing (thread378-6377)".