ASME STP/PT-033

Description / Abstract: This report is a review of the literature on post weld heat treatment of steels used in ASME Code construction. Based on this review, recommendations are made for use by the ASME Code writing committees on issues that these committees should consider. Examples of changes include the elimination of a mandatory PWHT for steels used in all lethal service and the use of fracture mechanics studies to justify departures from present ASME Code rules when a PWHT is not needed to address issues such as dimensional control and/or stress corrosion cracking.