Yes, You are right. I have experienced that during back gouging people remove the CS and groove is extended up to cladding and during filling up CS groove, CS wire(weld metal dilute with the cald portion and cracks observed in RT.
Even in thicker section where double V is required back cladding would be similar to like welding from inside. For pressure vessels it is usual to have double V with wider caldding on inside (no choice).
-- Even in thicker section where double V is required back cladding would be similar to like welding from inside. For pressure vessels it is usual to have double V with wider caldding on inside (no choice).
On 3 August 2010 15:30, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
CKPWhen you go for inside bevel? clad restoration area will be more in that case!
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Chaitanya Purohit
Sent: Tuesday, August 03, 2010 4:50 PMSubject: Re: [MW:6285] RE: 6250] clad welding
see attached file for better clarity.
On 2 August 2010 17:21, Potter, Richard <RPotter@itses.com> wrote:
The base material 516-70 should be masked back so that the cladding is
about 1/2" back from the edge of the bevel on both sides.
You would then weld the 516-70 to 516-70 under your normal conditions.
After the required NDE is completed you would restore the 410 cladding.
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of lusky
Sent: Monday, August 02, 2010 6:44 AM
To: Materials & Welding
Subject: [MW:6250] clad welding
I have to weld SA516 Gr 70 which has a 410 clad backing has anybody
done this? if so how were the results, there is no PWHT involved. 25mm
thick plate for a pressure vessle.
I have to qualify a PQR would be interested to read all comments
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