Tuesday, November 29, 2011

[MW:13083] Preheating temperature of 2nd process when use two welding process in one single joint (GTAW+SMAW)

Dear Experts,
 
When we are using two process (GTAW + SMAW) on pipe test coupon of a PQR, Root run & hot is done with GTAW process, immediately after hot pass we have started SMAW process,
 
Prior to start of SMAW process, temperature of coupon noted was 95 deg C
 
My question is whether this 95deg C will be considered as preheating temperature for SMAW process
 
Kindly advise in the light ASME Codes
 
Thanks in advance
 
Mhaskar Aly
UAE 
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