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Up Topic Welding Industry / Technical Discussions / PWHT of steam pipe
- - By rustroc56 Date 03-25-2016 03:40
Like to hear industry experience concerning to or not to PWHT P4 Gr 1 material in steam service ...applying B31.3 0.625" wall thickness exemption.  Who in industry is applying this exemption and to what extent?
Parent - By Joey (***) Date 05-05-2016 03:44
My past experience with steam piping fabrication (B31.1 or B31.3) are all using P1 materials with design pressure above 35bar and there was no PWHT requirement. Why P4 material for steam piping (B31.3)? is this part of equipment? The WPS to be used should indicate whether PWHT is included.
Up Topic Welding Industry / Technical Discussions / PWHT of steam pipe

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