Re: [MW:24390] Welding by SAW process is it mandatory for heavy thick vessels in H2 service

Hi!

As such There is no restriction on the welding process required to be Used

However Due to higher productivity, Good weld finish and consistant acceptable weld quality Client might have insisted on SAW process to be used

In such case you can use SAw in 2G position (Which is more popular for Girth welding at Site

 2G SAW systems are available

Regards

Hegde

On Saturday, 27 February 2016 2:56 PM, pavan kumar reddy Juturu <pavan2k20@gmail.com> wrote:

Dear Mr.Prasad,

Few years ago we did the same job, it was an Autoclave SA516 GR 70 (50mm) with inside inconel 600 cladding (6mm) , length-36000mm was fabricated at work shop by SAW process in three pieces and tranported to site. There we assembled three pieces and carriedout welding by SMAW process--->copper sulphate solution test before overlay at landing---->RT taken for SA516 GR70------> overlay welding carried out and each layer was DP tested.

i think it is difficult to do SAW at site.

Thanks & Best Regards, 

Pavankumar Reddy.

On Fri, Feb 26, 2016 at 10:57 PM, Prasad <prsgne@gmail.com> wrote:

Dear welding experts,

We are manufacturing heavy wall vessels for H2 service.

MOC SA 516 Gr 70. Thick 56 mm

Due to large size vessels are to be supplied in two sections.

Hence on site weld joint will have to be done at place of installation.

At shop we are using SAW process for welding.

At field rotating is not possible and we want to use SMAW process.

Our client is asking us to use SAW process for field weld joint also.

We know that SAW is semi automatic & more productive process.

My question is whether is their any restriction to use SMAW process.

Request experts to give their valuable views to convience client technically.

Best regards,

Prasad Ghanekar

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