Whats the thickness shall be done with PWHT CS material as per B31.3 latest edition .
Here the joint is branch weld of high thickness weldolet with low thickness pipe.
BINOY L
QC
If both thickness are under 25mm (1”), the PWHT can be exempted if you preheat to 95 C (or 200F) minimum.
If the weldolet exceeds 25mm, you need PWHT at 595 ~ 650C for 1hr/25mm.
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Feng Lu, Ph.D.
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As per the attached requirement from B31.3.2014 edition PWHT tequirement .the thickness considered is the lesser of the two parts joining .
Does it means if one of the parent metal is of below 25 mm PWHT not required.?
BINOY L
QC Engineer-Mechanical
AGC.
Project:AFU KKIA Riyadh.KSA
I have checked this but for PWHT the minimum thickness is not given.
BINOY L
QC Engineer-Mechanical
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I have checked this but for PWHT the minimum thickness is not given.
BINOY L
QC Engineer-Mechanical
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAOwU13tQWAZMSoY5C1OXOqYQYDHrSwnGvHcOuBR6MJc153h4dA%40mail.gmail.com.
As per b31. 3 latest no need of pwht for p no :1 I.e cs
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