RE: [MW:8657] Thickness calculation for weldolet

The design of the self reinforced branch connections (or olets) is compensating for the metal removed to make opening from header pipe, where the largest stress concentration would otherwise occur. Hence you must consider the thickness at crotch (hatched cross section in the below fig) for qualifications

 

 

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Srini
Sent: Friday, December 10, 2010 1:22 AM
To: Materials & Welding
Subject: [MW:8643] Thickness calculation for weldolet

 

Hi,

 

How do we calculate the thickness of the weldolet for welding

procedure qualification? Code is B31.3 and ASME SECIX. Weldolet is 8"

SCH40 Bonney forge. So is the thickness (B-C)/2 ie 21mm?  Does  the

procedure qualification has to support base material thickness of

21mm. The pipe is 8" SCH40. Which section of B31.3 or SEC IX would

address the requirement for this attachment weld between pipe and

weldolet?

 

Thanks for your help.

Srini