Tuesday, April 14, 2009

[MW:1939] Re: Variation in Pipe thickness

Hi Vivek raj,
THere is no limitatin specifically given by any code.However to answer your query,kindly take a note.When two pipes with same outer diameter but different thickness is ti be Butt welded,inorder to match the inner diameter,the thicker pipe is to be tappered from inside .The length/slope of tapper specified may be different by various codes e.g. ASME Section I says(Page 120 nearabout) the Taper shall be 1:3 of the difference in thickness of pipe(Thk. difference is 4mm.  than taper shall be 12 mm in length,slope will be adjsted by itself).
Hope the query is understood,
Regards,
Ashish A. Bhate
 
Ref. to what your applicable code says.On Mon, Apr 13, 2009 at 9:44 AM, raj <ar.vivekraj@gmail.com> wrote:

I have a query , when there is welding between two CS pipes of
different schedules ( different thickness) needs to be butt welded for
process piping application.

what is maximum variation in the thickness of two pipes , that will
ensure a safe weld.

Is there any code that provides any limitation or guidance .

Regards,

Vivek

Ph. Res.: 091-020-25667731
Mobile:9822099311

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