Joint Design

[Pradeep Chowdary]

Dear Experts,

I have an problem regarding with joint design, normally one end of pipe is came with V groove and fittings came with J groove, the thing is can we weld those joints..?? or we have to make J groove in pipe ?? Normally ASME 31.3 it's mentioned about thickness only. Apart from this, i remember that, Joint Desgin is a Non essential variable right??? So guys, shall i proceed for welding??

Please help me out with this issue..

Thanks and Regards,

Pradeep

[Kannayeram Gnanapandithan]

J in pipe

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

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[anand gupta]

Please check asme sex ix that joint design is non essential so can weld. a p gupta saudi aramco Sent from Yahoo Mail on Android From:"Pradeep Chowdary" <mech...@gmail.com> Date:Thu, 10 Mar, 2016 at 9:45 AM Subject:[MW:24457] Joint Design

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[Pradeep Chowdary]

Sorry.. Typing mistake..

In Pipe Its V groove and in Fittings J groove ( its about the thickness 25mm)

Pradeep

[james gerald]

Pradeep,

Normally Weld Bevels are made for below reasons

1. Accessibility (of torch & electrodes)

2. Flowability of the Weld Metal

3. Thermal conductivity of Base Materials ( where thickness also is considered when it changes the flow from 2D to 3D)

As per ASME Sec.IX, joint detail is a non-essential variable and if the above criteria are taken care of welding pipe with V bevel will not have any effect provided you produce sound weld joint without any lack of side wall fusion.

 

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

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From: Pradeep Chowdary <mech...@gmail.com>

To: Materials & Welding <material...@googlegroups.com>
Sent: Thursday, March 10, 2016 11:54 AM

Subject: [MW:24457] Joint Design

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[Lakshman]

We can go with V&J combination and no need to make J grove on pipe… (subjected to included gap shall be convenient to run the electrode)

 

Thanks & Regards,

Lakshman Kumar B,

+91 9440031459.

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Pradeep Chowdary
Sent: Thursday, March 10, 2016 11:55 AM
To: Materials & Welding
Subject: [MW:24457] Joint Design

 

Dear Experts,

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[Lalu Rajendran]

​Hi,

In that case, you may change pipe  groove to match J groove of fittings. It is easier than modifying a J groove to V groove.

regards,

LALU​

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[Kannayeram Gnanapandithan]

joint design is non essential that everybody knows, but in a joint , one member with J and another member with Bevel. This is not a good engineering practice to weld dissimilar bevel preparation???, in practical it is difficult

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

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[Pradeep Chowdary]

Yeah I accept that ...

[Pradeep Chowdary]

Lalu,

It's not too easy to modify a J groove to V groove because in ASME Sec B31.3 it's clearly mentioned about the bevel degree which we should be maintain. that's the only reason.

Regards,

Pradeep

[Pradeep Chowdary]

Again all,

It's something like dissimilar joints. So the conclusion is i have to J groove in Pipes to proceed with welding.. Am i right ????

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