[MW:26976] Re: QW 406 , preheat maintenance

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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