As per ASME SEC IX
preheat maintenance: practice of maintaining the minimum
specified preheat temperature, or some specified
higher temperature for some required time interval after
welding or thermal spraying is finished or until post weld
heat treatment is initiated
On Friday, 20 June 2014 17:59:50 UTC+5:30, Rajesh S.Mhaske,Engineer Welding,CSWIP,ASNT,Pune, wrote:
Dear sir
thickness and OD : 323 od* 70 mm thk
welding process : GTAW+SMAW
Material : SA106 Gr B
Preheating : 100 deg c
weld deposition : for GTAW : 4 mm, SMAW : 66 mm
Question :
1) Is the preheat maintenance (post heating ) is required for above material
2) If YES, what is time and temp plz send the back up
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