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…
Category: Fabrication
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…
Nozzles for pressure vessels can also be fabricated from standard size pipe and ANSI piping flanges, or from rolled-and-welded plate with plate flanges, as shown…
Integrally reinforced nozzles are recommended for shell components that are 2-inches thick and greater, or that have maximum design temperatures of 650°F and higher. These…
Elliptical and spherical heads for pressure vessels can be formed from one piece of plate by “pressing.” Plate of the required thickness is first cut…
Cylindrical ring courses for pressure vessels are most frequently fabricated by a process referred to as “rolling and welding.” Plate with the required thickness is…