About this document
PWHT Requirements per API 650 by hgagselim2012 is a document available to read on EtoBox.
The document discusses the post-weld heat treatment (PWHT) requirements for openings as per API-650. It states that PWHT is only required if the shell material is over 25mm thick and the opening diameter is 12 inches or larger. It further specifies that openings meeting these criteria must be prefabricated into the shell or thickened insert plate and thermally stress-relieved at 600-650°C for 1 hour per 25mm of thickness before installation. Exceptions are provided for flange welds and other attachments if
- Author
- hgagselim2012
- Language
- EN