API 510-2022 (2023) PDF

Full title and description

API Standard 510 — Pressure Vessel Inspection Code: In‑service Inspection, Rating, Repair, and Alteration, 11th Edition (API 510:2022) including Errata 1 (2023). The code provides requirements and guidance for the in‑service inspection, assessment, repair, alteration and rerating of pressure vessels and their pressure‑relieving devices used primarily in hydrocarbon and chemical process service.

Abstract

API 510 specifies inspection planning, inspection interval determination, inspection techniques, assessment of inspection results, repair and alteration procedures, and rerating methods to maintain the integrity and safe operation of pressure vessels. The 11th edition incorporates updated condition‑monitoring practices and an expanded section for analysis of inspection results; Errata 1 (March 2023) corrects select items from the 2022 text (Errata 2 was issued in 2025).

General information

• Status: Current / Active (11th Edition with published errata adjuncts).
• Publication date: 11th Edition published October 2022; Errata 1 issued March 2023 (and Errata 2 issued June 2025).
• Publisher: American Petroleum Institute (API).
• ICS / categories: 23.020 (Fluid storage devices) — relevant subcategories for stationary tanks and pressure vessels (e.g., 23.020.10 / 23.020.30).
• Edition / version: 11th Edition (API 510:2022), includes Errata 1 (2023) and Errata 2 (2025).
• Number of pages: 83 pages (main document); errata adjuncts are 1 page each.

Scope

Applies to in‑service pressure vessels and associated pressure‑relieving devices used in hydrocarbon and chemical process industries; it also can be applied to other process vessels at owner‑operator discretion. The code covers vessels built to construction codes (e.g., ASME Section VIII Divisions 1 and 2), non‑code vessels, jurisdictional specials and nonstandard vessels that remain in service. Decommissioned vessels removed from asset records are not within the “in‑service” scope.

Key topics and requirements

• Inspection planning and program requirements (internal, external and special inspections).
• Methods for determining inspection intervals and fitness‑for‑service assessments.
• Acceptance criteria and analysis of inspection results (condition monitoring and assessment).
• Requirements for repairs, alterations, rerating and recordkeeping.
• Use of pressure‑relieving devices (PRDs) and coordination with PRD inspection/maintenance.
• Interfaces with certification and qualification programs for pressure vessel inspectors (e.g., API ICP/API 510 certification).

Typical use and users

Used by owner‑operators, inspection agencies, plant engineers, maintenance and reliability teams, pressure‑vessel inspectors, repair/alteration contractors, and regulators to plan and execute in‑service inspection programs and to assess vessel fitness for continued service. It is commonly referenced in regulatory incorporations and company mechanical integrity programs.

Related standards

Commonly used alongside: ASME Boiler and Pressure Vessel Code (construction rules), API RP 572 (Inspection Practices for Pressure Vessels), API 570 (Piping Inspection Code), NBIC (National Board Inspection Code) and other API recommended practices addressing corrosion, welding, and inspection techniques. Regulatory references and incorporations vary by jurisdiction.

Keywords

pressure vessel, in‑service inspection, inspection intervals, repair, alteration, rerating, PRD, condition monitoring, API 510, mechanical integrity, fitness‑for‑service.

FAQ

Q: What is this standard?

A: API 510 is the American Petroleum Institute’s in‑service inspection code for pressure vessels — it establishes requirements for inspection, assessment, repair, alteration and rerating to maintain safe operation.

Q: What does it cover?

A: It covers inspection planning and execution, inspection intervals, acceptance criteria, condition assessment and the procedures for repair, alteration and rerating of pressure vessels and their pressure‑relieving devices while in service.

Q: Who typically uses it?

A: Owner‑operators, plant engineers, maintenance and reliability personnel, inspection agencies, repair contractors, certified pressure vessel inspectors and regulators. It also underpins API’s ICP inspector certification programs.

Q: Is it current or superseded?

A: The 11th Edition (API 510:2022) is the current edition; it includes Errata 1 (March 2023) and later Errata 2 (June 2025) as adjunct updates. Users should confirm they are working from the edition and errata set adopted by their jurisdiction or organization.

Q: Is it part of a series?

A: Yes — API 510 sits within API’s family of fixed‑equipment inspection standards and is frequently used with API RP 572 (pressure vessel inspection guidance), API 570 (piping) and other API recommended practices and API certification programs.

Q: What are the key keywords?

A: Pressure vessel, inspection, in‑service, repair, alteration, rerating, PRD, mechanical integrity, API 510, condition monitoring.