Re: [MW:34037] Re: Regarding weld overlay with ECuNi 90/10 with the WPS ECuNi (70/30)

There are certain points to be considered.

1. It is only clad restoration or weld overlay of entire vessel. In the later case discuss with your process engineer / Materials engineer for its suitabiity for corrosion point of view. In the former case discuss with your corrosion engineer / materials engineer for the possibility of Galvanic corrosion.

2. ASME Sec.IX code wise no restriction.

On Wednesday, 1 March, 2023 at 04:11:50 pm IST, Jenish Mistry <jenishmistry1992@gmail.com> wrote:

Dear sir ,

I think dilution rate for both consumable is different because weight percentage of chemical composition is different .

So that, Min. weld overlay qualification thickness for required weld overlay composition may be vary due to the dilution rate.

So that,I think you should go for PQR qualification for min. Weld overlay qualification thickness for required weld Composition.

On Wed, Mar 1, 2023 at 3:29 PM Vishwas Keskar Welding Manager WELDING <vvkeskar123@gmail.com> wrote:

This non ferrous weld metal.

What is the F number of PQR  filler metal?

If PQR filler metal's F number and Production joint filler metal's F number  is same ,then new PQR is not required 

Thanks

Vishwas -IWE 

On Friday, February 24, 2023 at 3:23:47 PM UTC+5:30 mohit aggarwal wrote:

Dear Experts,

We have equipment of weld overlay with 90/10 CuNi composition, but we have Procedure is only with 70/30 CuNi consumable.

As per QW-404.37 clause our AI asked to requalify the procedure due to change of consumable.

I have query can we do weld overlay of 90/10 with 70/30 consumable or we will have qualify new procedure for the same.

Regards,

Mohit Aggarwal

Welding Engineer

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