Re: [MW:13094] RE: 13083] Preheating temperature of 2nd process when use two welding process in one single joint (GTAW+SMAW)

Dear Friend,

 

We Know that Preheat is the Minimum Temprature. (When you inial/ first start of welding) 

 & Interpass temprature is the maximum teprature to be measured. (we have to maintain the temprature should not increase from the Interpass Limit Max. temprature)

 

In your case that will be the Interpass temprature. because you started the 2ND (smaw) Process immidiately.

 

Thanks & Regards

Amit Pahuja

Sr. Welding Engineer

CHIYODA

QATAR

On Tue, Nov 29, 2011 at 11:05 AM, Abuhanip bin Abdul <abuhanip@labuanship.com> wrote:

Dear Mhaskar,

If you take that temperature before start welding SMAW process then it will be consider as preheating temperature for SMAW

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Aly
Sent: Tuesday, 29 November, 2011 2:40 AM
To: materials-welding@googlegroups.com
Subject: [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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