API RP 582 Fourth Edition 2023 PDF

This recommended practice provides supplementary guidelines and practices for welding and welding-related topics for shop and field fabrication, repair, and modification of the following: pressure-retaining equipment; tanks and attachment welds; nonremovable internals for process equipment; structural items attached and related to process equipment; and other equipment or component items when referenced by an applicable purchase document.

This document is general in nature and augments the welding requirements of ASME Boiler and Pressure Vessel Code (BPVC) Section IX, ISO 15614, and similar codes, standards, specifications, and practices, such as those listed in Section 2 of this document. The intent of this document is to be inclusive of chemical, oil, and gas industry standards, although there are many topics not covered herein.

This document is based on industry experience. Restrictions or limitations may be waived or augmented by the owner/operator or purchaser.