NDT Procedure Compliance Guides

A complete guide to the mandatory elements, common gaps, and corrective actions required for ASNT SNT-TC-1A compliant written practice and NDT procedures.

Every mandatory element required by ASME Section V Articles 1, 4, 5, 6, 7, and 9 — with a practical checklist to catch non-compliances before your Level 3 review.

Understand the fundamental differences between ASNT SNT-TC-1A employer-based certification and ISO 9712 / PCN third-party central certification, and which applies to your procedures.

Based on AI review of hundreds of NDT procedures, these are the most frequently found non-compliances across UT, RT, MT, PT, and advanced methods — with exact corrective actions.

Phased Array UT procedures face stricter requirements than conventional UT. This guide covers every mandatory element under ASME Code Case 2235, ASME Section V Article 4, and ISO 13588.

Time of Flight Diffraction (TOFD) procedures require specific elements beyond conventional UT — including D-scan documentation, dead zone analysis, and TOFD-specific calibration. This guide covers all mandatory requirements.

A full guide to writing ASME Section V Article 2 and API-compliant RT procedures — covering source selection, IQI calculation, geometric unsharpness, film processing, and the most frequently failed RT procedure elements.

ECT procedures for heat exchanger tube inspection under ASME, API 510, and EPRI guidelines. Covers frequency selection, calibration standards, probe selection, signal analysis, and reporting requirements.

When written procedure compliance alone is not enough, ASME requires physical demonstration. This guide explains when PQD is mandatory, how to plan a mock-up demonstration, and what your procedure must document.

Everything your PT procedure must contain under ASME Section V Article 9 and ISO 3452 — penetrant families, mandatory dwell times (minimum AND maximum), developer requirements, lighting conditions, and the most common liquid penetrant non-compliances found during Level 3 review.

Your Written Practice is the legal foundation every NDT procedure rests on. This complete guide covers every mandatory section required by ASNT SNT-TC-1A — training hours by method and level, examination types, minimum passing scores, certification periods, eye examination requirements, and the deficiencies that cause Written Practices to fail audit.

Corrosion mapping using ultrasonic thickness measurement is one of the most common NDT applications in oil & gas. This guide covers mandatory procedure elements for C-scan corrosion mapping under API 653, ASME, and offshore inspection standards — including grid spacing, minimum thickness calculations, scan coverage, and data recording.