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[MW:14508] RE: 14497] Weld joint strengthcalculation for Branch welded CS Pipe

By Materials & Welding

Dear Krishna Kumar,

 

To the best of my view we can follow the following steps – may be client will accept if we convience.

 

1.       Calculate the thickness required for the 2” dia pipe by using the formula – T= PD/2S and considering the client safety factor, D/T ratio, corrosion allowance and any factor’s  etc.

Then you will get value of “T” – as per the derived value

2.       branch weld throat thickness– client spec if any for weld joint efficiency  - and as per B 31.3  - 328.5.4  - by considering all these  – fillet throat thickness will be decided – subjected to minimum of 0.707T or 6 mm whichever is higher of throat thickness - And in such cases reinforcement pad may also not required.

 

And in 328.5 – all required details are provided for easy reference including various options for connecting of branch

 

Thanks and Regards................?

 

Lakshman Kumar.B|Manager |Lanco Infratech Limited

Plot No 1255 | Sanjeevani chowk | Mahanadi vihar | Cuttack 753004

Phone : + 91 671 2445033 | Mobile : +91 9937286851 |www.lancogroup.com

Go Green|The future will thank you

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Krishnakumar M S
Sent: Friday, June 08, 2012 8:43 PM
To: materials-welding@googlegroups.com
Subject: [MW:14497] Weld joint strengthcalculation for Branch welded CS Pipe

 

Dear Experts,

 

I want to branch a 2" dia CS pipe from 10" dia API 5L-Gr.B sch.40 welded pipe, service is Cooling Water, Design Pr. 8 Bar.g @ DT. 65 Deg.c

The branch is taken from horizontally, how to determine the minimum thickness of weld and strength for this Branch line when I can place a valve (concentated Load) between branch weld joint and nearest pipe support. Is there any calculation is available in Piping codes. In B31.3 the calculation available is for Branch Reinforcement.
Give me a solution to calculate the weld joint strength.

Best Regards,

Krishnakumar
Design Engineer (PIPING)
AKP Engineering & Consultant co.
Al-Khobar
Kingdom of Saudi Arabia

 

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