Sunday, November 27, 2011

Re: [MW:13071] QW-200.4

Advantage of combining two processes:
 
Suppose u have two wps as below
 
1: WPS with GTAW with 13mm base plate thickness (Base metal Qualification range is 26mm max) 
 
2:WPS with SMAW with 20mm base plate thickness (Base metal Qualification range is 40mm max) 
 
If u combined these two WPS, the advantage you can get is u can weld GTAW process double the max thickness between two process ie  (2 x 20mm = 40mm) not upto 26mm only.
 
You can use more than one WPS in one single joint, just to increase base metal thickness qualification range one can combine two process as per QW-200.4(b).
 
You can create many WPS from one single PQR as needed.
 
Hope this is clear for you..
 
Mhaskar Aly
 
 
 
 
-------Original Message-------
 
Date: 18/11/2011 21:08:13
Subject: [MW:13020] QW-200.4
 

Dear experts....Can anyone provide some Section IX interpretations for clause no.QW-200.4 ?................Can anybody explain this clause better ?...........It clearly states that multiple wps of different processes can be combined together and we can make a single wps combining that processes...........and from one pqr combining different processes ,individual wps can be prepared for each process..............the root deposites clause of min 13 mm is an ALTERNATE requirement....is it really applicable in which situation ?...............

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