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[MW:16544] PWHT soaking Time on SS Overlay

By Materials & Welding
 Dear experts ,
 
The production weld ( corrosion resistance overlay (SS)  3mm was deposited on the AISI 4130 Thk 50mm  by SMAW )  PWHT soaking time was exceeded the PQR soaking time more than 25% ,recommended by ASME Sec IX .
 
QW-407.9 A separate procedure qualification is
required for each of the following:
(a) For weld corrosion-resistant overlay of A-No. 8 on
all base materials, a change in postweld heat treatment
condition in QW-407.1, or when the total time at postweld
heat treatment encountered in fabrication exceeds 20 hr,
an increase of 25% or more in total time at postweld heat
treating temperature.
 
Pl. advice on the above code case as the chemical composition on PQR meets A .no.8 of sec IX
 
 
Best  Regards
Venu Moturu
 

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