Hi shibu,
U can give mini. 10 deg. in WPS for CS pipe, for WT upto 25.4mm.
On Sat, Jul 17, 2010 at 9:08 PM, shibu simon <shibusimon2000@yahoo.co.uk> wrote:
Dear all,
Carbon steel base metal initial temperature was 32 deg celcius, during PQR qualification as per API 1104. Decreasing pre heat temperature is an essential variable as per API 1104. So what minimum preheat temperature to give in WPS.
Thanks.
shibu simon
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