Tuesday, April 7, 2015

[MW:23047] Magnetization of A 335 P11/P12 during grinding process

Dear Experts,
 
We have observed that piping material  A 335  P11 & P12 of Super heater Header Tee size 12"& 18" (Thickness 45.00 mm & 65.00 mm respectively)  was magnetized during grinding process at Location (not in workshop).   Can anyone tell us how this phenomenon occurs and how it can be de-magnetize at job location? The weld material is getting cracked after welding. Please suggest the  welding procedure with suitable welding electrodes & what precautions  to be taken during welding.
 
 
Regards
 
B Osare
From National Fertilizers Limited, Vijaipur
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