Dear Sir's,
-- Kindly reply to my below query:
We have project approved WPS with following details:
Material Spec: ASTM A106 Gr.B
P no:1/Group no:1
Material thickness: 1.5 -14.22 mm
Welding process: GTAW+SMAW
GTAW-Filler wire : ER 70S-2
SMAW-Electrode: E 7018
Preheat - 10 deg minimum
Interpass temp: 200 Deg C Maximum
In the PQR: pre heat temperature:38 deg C
Interpass temperature: 68 deg C maximum
Since interpass temperature is not a essential variable (Impact test is not applicable); but still our client is asking to recheck the max.interpass temperature value ( 200 Deg C) in the WPS. How to convince client to get approval on the same?
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
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