Reinforcement Calculations - ASME 31.3

for caluation reinforcement pad or ring joint , refer appendix H of ASME B 31.3 edition 2004 (sample calculation for branch reinforcement).

I k now about those examples...what i am asking is about the A4, is there any reference for calculating the same. There are number of cases given for the same in the welding section, which one to choose and when??

Is there any other reference given in the code or some where else?

for calculating strength of branch connection :-

a) first you have to calculate the branch strength without pad .

A4 = Area of weld metal at branch

= 2 tc^2 (tc= lesser of 0.75Tb or 6 mm) Tb- Nominal thickness of branch (mm)

if additional reinforcement pad (A2+A3+A4< A1) is required as par example -1

b) calulate branch stength with pad

A4 = Area of Pad+ area of weld at banch + Area of weld metal at pad edge

A4 = Tr(Pad OD -Db)+ 2tc^2+0.5*Tr^2

Tr - Nominal thickness of pad(mm)

Db - Diameter of branch (mm) as given in example 2 and 4 for 90 degree intersection

and example 3 for 45 degree intersection.

in case if above explanation is not sufficient for you , then you send me your mail i.d i will farword refrence calculation for that.

Dear Sir, I have gone through ur suggestion but its not clear to me. Can u pls send a detailed example for that.

Hi,

Could you please send across a typical calculation sheet for finding the value of A4 ? I'm also finding difficulty in fixing up the pad size as per 31.3

My email is *

thank you !!

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in asme b 31.3 its shoe that to find A4 they calculate with minimum leg dimension of fillet weld