Re: [MW:32290] Re: Back Weld at Pressure vessel - U stamp

Check for the below.

1, Check the material & Code and determine whether PWHT is required  and if so carried out after repair.

2. Check the other side welded single pass or multipass, required when Impact test is Applicable. (i believe for 10 mm no Impact test is required anyhow check the code & Material).

Above 2 conditions are satisfied then no issue

Thanks & Regards

J.Gerald Jayakumar

On Monday, 19 April, 2021, 04:01:43 pm IST, sankar bombay <sankar.bombay@gmail.com> wrote:

On Mon, Apr 19, 2021 at 11:39 AM 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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