since max welding is taken place SMAW, it is better to go for POST Heat . temp 50degree above ur preheat temp and time for minimum 30minutes
THANKS & BEST REGARDS
KG.PANDITHAN, AWS-CWI, CSWIP 3.1
CONSULTANT-WELDING & QUALITY
On Thu, Jun 26, 2014 at 11:09 PM, Mahantesh Loni <mahantloni@gmail.com> wrote:
Post heating. Not required
On 21-Jun-2014 9:18 AM, "rajesh s. mhaske ,Engineer Welding ,PUNE,INDIA" <rajesh.mhaske17@gmail.com> wrote:--
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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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