PWHT treatment requirements are typically dictated by codes and standards and by any special requirements due to the service conditions of the welded structure. For steel fabrication the …

Feb 6, 2006 · After welding, if PWHT is also required then it has to be done regardless of whether stress relief was done or not. Moreover the PWHT requirement is a consequence of welding, …

Oct 24, 2024 · Hello engineers, I am starting work on boiler pipelines according to ASME section I and B31.1. We will weld pipes with P no. 4, 5A and 15E with quite large diameters (up to 813 …

Feb 8, 2006 · A client is fabricating a vessel which requires PWHT. They plan to UT the welds of the vessel to satisfy the NDE requirements prior to PWHT. Is it required to repeat the NDE …

Feb 16, 2012 · So, lack of PWHT will increase susceptibility, mostly from residual tensile stresses, and not just hardness. This is why carbon steel tanks and fittings containing concentrated …

Mar 12, 2015 · Dear metengr, it means PWHT is mandatory for thickness less than 1", however above 1" can be exempted due to preheat. What is the effective date of B31.3-2014 ? is there …

Nov 25, 2022 · Hi All, We are supplying an ASME VIII Div 1 pressure vessel (wall thickness 15mm) containing process gas consisting of over 500ppm H2S. There is nothing in the clients …

Nov 11, 2005 · What I would like to find out is, can I order Material Non-normalized and then PWHT to the Normalizing Temperature. Would this Procedure result in a Normalized and …

Jan 18, 2012 · The extra time for PWHT is typically for notch toughness properties because notch toughness may degrade over extended PWHT time. This is why I asked about impact testing. …

Jun 27, 2017 · PWHT is often done on stainless steel when required by Owner or Owners' Engineers; e.g.,. solution annealing, stabilization treatments, primarily where corrosion service …