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Re: [MW:22017] tube to tube sheet qualification.

By Materials & Welding
Dear sir 
Please note that carrying out tube to tubesheet mock up before actual welding On job is the intent of the code.
This involves the actual welding variables and sequence to be followed on job.
You should weld the mock up simulating actual job condition and sequence. I.e. Do exactly same on mock up what you want to do on job.

For your query regarding combining two mock up qualifications. 
Ask your AI or concerned tpi for its acceptance. In this case they may refuse you proposal of combining two PQRs because it is not simulating actual job conditions. 
Anyway you talk with them and proceed.


Best regards
Jignesh Makwana


Sent from Samsung Mobile


-------- Original message --------
From: Mahesh Mirje
Date:26/09/2014 08:36 (GMT+05:30)
To: materials-welding@googlegroups.com
Subject: Re: [MW:22000] tube to tube sheet qualification.

Thanks hegde sir for valuable revert,
Still have little bit query,
I have two separate qualifications of mock up for same pattern,  but only thing is one is with addition of filler wire, another one is without addition of filler,
But in actual job, now welder is welded intially by fussing ( 90 % of welding without addition of filler) then unfilled portions are welded by adding filler wire to achieve good finish.

So shall I make single mock up wps using those two pqrs,
If no, then Wat to do in above case,
If I need to again qualify mock up procedure in single pqr using initially wihout filler and then by addtion of filler wire ,is it allowed by code?

Regards
Mahesh mirje

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