Re: [MW:26581] Re: QW 407.4 Clause requirement

Hi!

Yes weld metal does not come under preview of Qw 407.4 but there is restriction on base metal thk which is 1.1 time T  of test plate of PQR so indirectly autometicaly.applies to weld metal 

Incase of multiprocess PQR.undergoes NR and if the weld thk of each process is more than 19mm in such case each process weld thk qualifies to max thk equal to 1.1T of PQR test plate and  for weld less than 19mm it qualifies 2t of each process

Regards

Hegde Prakash

Sent from Yahoo Mail on Android

On Sun, 4 Jun 2017 at 10:42, MW

<raghurambathula@gmail.com> wrote:

even some time interpretation needs interpretation??
in my opinion, QW 407.4 does not apply to weld metal thickness.

On Saturday, 3 June 2017 09:25:35 UTC+4, vijay Katkar wrote:

Dear Sir,

 

Need your help on following issue,

 

I have PQR with 88 mm thickness ( SMAW – 32 mm & SAW -56 mm)and it  has normalizing + stress reliving heat treatment. Generally it is used for dish end long seam (where fiber elongation is more than 5%).

 

As per QW 407.4 Base material thickness T will be qualified 1.1 times of test coupon thickness, in my case it will be 96 mm maximum and deposition thickness will be as per QW 451 table but shall not be more than base metal thickness. As per my assumption SMAW- up to 96mm & SAW- up to 96mm will qualify.

 

As per interpretation IX 83-102. Both thickness will qualify 1.1 times. It means that SMAW will qualify up to 35 mm & SAW -  61 mm. Is this interpretation valid as per latest code requirement?

 

 

I have attached interpretation copy for your reference.

Vijay Katkar 

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