API RP 572 – Inspection of Pressure Vessels

Systematically assess your pressure vessel inspection programme against API RP 572 — covering inspection planning and intervals, inspector qualifications, pre-inspection preparation, external visual inspection, internal visual inspection, NDE method selection and application, shell and head thickness measurement, nozzle and manway inspection, weld inspection, corrosion allowance assessment, inspection of vessel internals and supports, fitness-for-service evaluation, pressure testing, and inspection records management.

API RP 572 (3rd Edition) Companion to API 510 NDE – UT / RT / PAUT / TOFD CML Thickness Measurement Fitness-for-Service (API 579) Auto-Save Enabled

Showing all API RP 572 inspection topics.

All vessel zones shown.

Overall Progress

✓ Compliant: 0 ~ Partial: 0 ✗ Gap: 0 — N/A: 0 ○ Not Assessed: 0

⚙️ Inspector / Company & Pressure Vessel Details

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API 510 Inspection Status

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Scope of Assessment

TOPIC: GeneralPlanning QualificationPrep ExternalInternal NDEThickness WeldsCorrosion FFSPressure Test InternalsRecords All Shell Heads Nozzles Welds Internals External

Pressure Vessel Inspection Programme Report

Section-by-section compliance overview for API RP 572 Inspection of Pressure Vessels.

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📊 Section Compliance Rate

🔴 Identified Gaps & Actions

ISO Xpert – Your API RP 572 Pressure Vessel Inspection Partner

Expert pressure vessel inspection programme consulting — API RP 572 gap analysis, inspection plan development, NDE programme review, CML optimisation, corrosion rate review, fitness-for-service support, and API 510 inspection engineer training. Headquartered in London, serving clients globally.

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Last Updated: April 2025 | ISO Xpert Ltd

For legitimate internal pressure vessel inspection programme assessment only. Results are indicative. API RP 572 is the property of the American Petroleum Institute (API). ISO Xpert Ltd is not affiliated with API. Governed by the laws of England and Wales.

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API RP 572 Inspection of Pressure Vessels — Frequently Asked Questions

Authoritative answers about API RP 572 Inspection of Pressure Vessels, inspection intervals, qualifications, RBI, and ISO Xpert consulting.

What is API RP 572?

API RP 572 is the American Petroleum Institute Recommended Practice for Inspection of Pressure Vessels. It provides guidance on inspection techniques, methods, and practices for pressure vessels in refinery and petrochemical service. While API 510 defines the inspection code requirements (intervals, authority, record-keeping, fitness-for-service), API RP 572 provides the practical how-to guidance for conducting inspections of each vessel component.

What NDE methods are covered in API RP 572?

API RP 572 covers all major NDE methods applicable to pressure vessel inspection including: visual examination (VT); ultrasonic testing (UT) — manual A-scan, phased array (PAUT), time-of-flight diffraction (TOFD), and automated UT for scanning; radiographic testing (RT) — film and digital/computed radiography; magnetic particle testing (MT); liquid penetrant testing (PT); eddy current testing (ET); acoustic emission testing (AET); and remote field testing (RFT) for tubes.

What is a CML in pressure vessel inspection?

A Corrosion Monitoring Location (CML) is a specific location on a pressure vessel or piping system where periodic thickness measurements are taken to monitor metal loss from corrosion or erosion. CMLs are strategically located at areas of expected highest corrosion activity (low-flow areas, water accumulation points, injection points, areas downstream of turbulence). The number and location of CMLs should be established based on the damage mechanisms expected from the service conditions, API RP 571 knowledge, and historical inspection data.

How does API RP 572 relate to API 510?

API 510 (Pressure Vessel Inspection Code) defines the mandatory requirements for pressure vessel inspection in operating facilities — inspection intervals, inspector qualifications, alteration and repair procedures, fitness-for-service evaluation criteria, and documentation. API RP 572 is the companion recommended practice that provides technical guidance on how to perform each type of inspection, select appropriate NDE methods, interpret findings, and plan the inspection programme. Both should be used together for a complete pressure vessel inspection programme.

Can ISO Xpert help with API RP 572 pressure vessel inspection programmes?

Yes. ISO Xpert provides API RP 572 pressure vessel inspection programme gap analysis, inspection plan development, NDE programme review, CML optimisation, corrosion rate calculation review, fitness-for-service assessment support, and inspector training. Contact us at info@iso-xpert.com or call +44 7853 109840.

API RP 572 – Inspection of Pressure Vessels

⚙️ Inspector / Company & Pressure Vessel Details

Pressure Vessel Inspection Programme Report

ISO Xpert – Your API RP 572 Pressure Vessel Inspection Partner

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API RP 572 Inspection of Pressure Vessels — Frequently Asked Questions

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