Note PWHT is a very important factor that can have a significant effect on the integrity and reliability of the vessel. Omitted or improperly performed…

Attaching a support skirt to a pressure vessel does not involve a pressure containing weld. Nevertheless, the skirt attachment weld must be made properly to…

ASME Code, Section VIII, Division 1, has recently changed the requirements for NDE to permit spot RT of girth welds (Category B welds) when full…

The cylindrical shell and head components are joined together with girth welds (Category B welds). These welds are usually made using a welding procedure employing…

ASME Code, Section VIII, Division 1, does not require any NDE of nozzle welds (Category D welds), regardless of the extent of RT and the…

Nozzle welds (Category D welds) can be the most difficult welds to make. More flaws are encountered in these welds than in longitudinal welds (Category…

ASME Code, Section VIII, Division 1 (Paragraphs UW-11 and UCS-57), requires RT examination of longitudinal welds for shell components of carbon steel vessels exceeding 1¼-inches…

The plate materials for cylindrical shell components are rolled (formed) into cylindrical shapes with the required diameters, and the bevels (joint preparations) for the longitudinal…

Nozzles built-up from rolled and welded plate with plate flanges will generally be required for larger diameter openings, when standard pipe sizes and ANSI B16.5…

The fabricator must procure the pipe and forged pipe flanges according to the materials specified in the vessel drawing as designated by “SA Specifications” in…