You question is very general.
PWHT depends on the following factors:
Thickness
Material grade
Service requirements (example: lethal service)
For some grades (Pno-15E materials) preheat maintenance is required when PWHT is not done immediately after welding
Στις Δευ, 26 Οκτ 2020 στις 6:41 π.μ., ο/η NIKHIL THOMAS JOY <nikhil.thomasjoy@gmail.com> έγραψε:
Dear sir, Good evening
Sir, kindly please solve my doubt related to POST HEATING IN PWHT.
1.Where we need to do post heating.
2.If I am doing pwht sudden after welding is there any need of post heating or not.
3.In any code post heating mentioned.
Please give me answer for the above mentioned question.
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Dr. Georgios Dilintas,
Dipl. Ing. In Aeronautic and Space Engineering
Ph.D in Mechanics of Solids - Computational Mechanics
A.I.S, A.N.I, IRCA Lead Auditor
Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis
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