Materials & Welding: Re: [MW:32297] Re: Back Weld at Pressure vessel

Monday, April 19, 2021

Re: [MW:32297] Re: Back Weld at Pressure vessel - U stamp

And if it is a container that will have an ASME Stamp with a U Designator, why don't you ask your Authorized Inspector what is assigned to you?

El lun, 19 abr 2021 a las 7:35, Ramesh (<rameshkannandevaraj@gmail.com>) escribió:

Don't not confuse with production weld and repair welds

Though its single sided weld as per WPS for your production , when repair comes at root what you do ? ( presuming accessible at root side )

For repair, your weld metal is backing material, so any welder qualified with backing or without backing can repair in your case.

Thanks and Regards
Rameshkannan D
"What you have learned is a mere handful; What you haven't learned is the size of the world – Avvaiyar"

On Mon, Apr 19, 2021 at 5:31 PM Vishwas Keskar <vvkeskar123@gmail.com> wrote:
Dear Samkar

May I know what is your concern now ?

On Mon, Apr 19, 2021 at 3:51 PM sankar bombay <sankar.bombay@gmail.com> wrote:
For GTAW Welder QW-402.4 Deleting of backing is essential Variable
Addition of backing they have not mention

On Mon, Apr 19, 2021 at 2:19 PM Ramesh <rameshkannandevaraj@gmail.com> wrote:
Seems weld repair carried out at the root side. Whether your repair carried out as per approved repair procedure ?

With Backing or without backing is essential for welders, not for procedures !

unless there are any specific requirements from the client / inaccessible area for root welding.

Thanks and Regards
Rameshkannan D
"What you have learned is a mere handful; What you haven't learned is the size of the world – Avvaiyar"

On Mon, Apr 19, 2021 at 1:09 PM Vishwas Keskar Welding Manager WELDING <vvkeskar123@gmail.com> wrote:
Is that WPS addressing -
QW 402 - Joint design - GTAW - Backing - With/Without
(Ref - QW256- GTAW - QW 402.5- Addition of backing is Non essential variable.)

if Both (Backing - With/Without ) is addressed( which like normally is addressed), then there is no issue at all .
Eg-
QW 402-
Backing: With/Without

Root spacing: As per piping fabrication drawing

Backing Material (Type): Yes (Metal)

1. Metal - 2. Non-fusing Metal
3.   Nonmetallic NA   4. Others

The matter is to be resolved amicably . Meet QAC In charge along with Welding Engineer, Manufacturing Responsible. Explain him the details .
It shall be acceptable.

Regards

On Monday, April 19, 2021 at 7:20:46 AM UTC+4 sankar krishnan wrote:
Dear Gentlemen,

Good Evening, In our project Vessel joint thickness 10mm ,Process(GTAW+SAW),Single V joint
They completed Welding ,Few days later during Inspection we observed , They have done Internal Welding of the shell, As per WPS its not shown

Guys let me Know its can Accepted or Rejected

If Rejected , Please send Reference code standards

As per QW 402.5 Joints (Backing its non Essential ),Its mention Backing strip or also back welding

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