API 621 (Reconditioning of Valves)

API 621: Reconditioning of Metallic Gate, Globe, and Check Valves

API RP 621 offers a maintenance-focused framework for evaluating and reconditioning metallic gate, globe, and check valves that an owner intends to return to service.

It supports decisions on inspection, repair work, and the condition of existing valves, helping maintenance teams document the approach used to extend service life within an operating facility.

The guidance is directed toward appropriate end-user valve refurbishment rather than preparing used equipment for resale or redesigning new valves.

Because a reconditioned valve may not meet all requirements applicable to a new valve, asset owners should use the practice alongside the facility’s engineering, inspection, and acceptance criteria.

Scope

The 2018 edition’s stated subject can be understood through these practical coverage points:

• Guidance for reconditioning heavy-wall metallic gate, globe, and check valves made from carbon steel, ferritic alloy steels, stainless steel, and nickel alloys.
• Application to specified ASME pressure classes and to flanged or butt-weld cast or forged valve designs covered by the recommended practice.
• Refurbishment of an owner’s existing valves for continued use in that owner’s facility, with attention to the repair and inspection process.
• Exclusions for used or surplus valves prepared for resale and for modifications to new valves; reconditioned equipment should not automatically be treated as equivalent to new-valve product certification.

File Specifications