Re: [MW:11532] GMAW application restriction

if it is made for the structural equipment , then why it is using in pipeline industry in big range ? even though it's operating on very high pressure i.e. 100 bar and more .
reg. RA

On 30 June 2011 15:50, AVA <ava.ssg@gmail.com> wrote:

There is no limitation for  GMAW in ASME code. But pay attention that some of gas cavities made in weld metal that are acceptable according to codes, but it's make may risk for hydrogen induce. Then this process is commonly used for structural equipment's, not in pressure parts.

 

Regards

A.V.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Dinesh Somwanshi
Sent: Thursday, June 30, 2011 1:06 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:11528] GMAW application restriction

 

generally GMAW is used for the filling & capping only.generally the amout of heat produced in this process also there will be chances of lack of fusion at the edges ( fusion boundaries ) the torch cup also makes sometimes for welding in the joint.But this process limited to only low pressure . You can follow with the s maw root & hot ,followed by remaining g maw .

regards

dinesh

On Thu, Jun 30, 2011 at 9:57 AM, Maulik Thakkar <mlkthakkar2@gmail.com> wrote:

Dear All,

 

Why GMAW is not widely used for single sided full penetration joints (with out chip back) for pressure vessel industrial applications?

Is there any problem regarding to penetraiton or lack of fusion? I am confusing. Request you to give technical answer.

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Regards,

Rajeev Arora
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