Yes brother compulsory you have to do preheating but you need to maintain the temperature so my recommendation is better for coil induction coil heating is good to maintain the temperature
On Wed, 14 Apr, 2021, 7:55 am QA/QC, <adnanziad49@gmail.com> wrote:
Dear masterswe want to weld a pipeline api 5l x70 thhikness 28 mm so we want to know the requierement of PWHT CODE API 1104AND ALSO FOR A333 GR 6 THICKNESS 45 MM CODE B31.3 . PWHT REQUIERMENTCAN ANYONE CLARIFY IT FOR ME--
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