Standard Guides:WeldingPipingASMEAPIAsset Matrix
Time-of-Flight Diffraction
AdvancedUltrasonic • TOFD

Time-of-Flight Diffraction (TOFD)

Method Overview

Precision diffraction-based flaw sizing and monitoring, providing high-accuracy weld integrity assessments.

Core Method Specifications

Technique IDTOFD
AcronymTOFD
CategoryAdvanced
ModalityUltrasonic
Default Report TemplateTOFD-Standard-Template

Target Applications & Governing Standards

2 Scopes Configured
Pressure Vessels
API 510 ASME Code Case 2235
Target Assets / Components:
Heavy Wall Pressure VesselsReactor Shell Welds
Detectable Defects & Anomalies:
• Volumetric Weld Flaws• Height/Length Sizing• Through-Wall Cracking
Piping & Loops
API 570 ASME B31.3
Target Assets / Components:
Thick-Wall Piping CircuitsHeaders
Detectable Defects & Anomalies:
• Root Crack Growth• Thermal Fatigue Cracks

Technique-to-OEM Compatibility Matrix

Verified manufacturers, instrument models, and diagnostic portals supporting TOFD.

4 Verified OEMs
Sonatest

Sonatest

High performance ultrasonic instruments, phased array flaw detectors, and UT transducers.

Modalities:UTPAUTTOFDDCUT
OEM Profile Sonatest Support Hub
OEM Site
Zetec

Zetec

Advanced eddy current and ultrasonic NDT technology for power generation, oil & gas, and aerospace.

Modalities:UTPAUTTOFDETRFET+1 more
OEM Profile Zetec Technical Support
OEM Site

Evident Scientific

OEM Manufacturer for TOFD inspection systems.

Verified Partner

Waygate Technologies

OEM Manufacturer for TOFD inspection systems.

Verified Partner
ASME Sec V & ISO 9712 Qualified
Rent TOFD Instruments OEM Hardware CatalogPost TOFD Project Scope
AI-Assisted Technical Reference & Regulatory DisclaimerEducational & Reference Only

Technical articles, damage mechanism guides, inspection scopes, engineering formulas, and code summaries published across the NDT Exchange knowledge base are synthesized with the assistance of Artificial Intelligence (AI) and specialized industrial engineering reference models.

While all content is cross-referenced against authoritative standards (ASME, API, AWS, ISO, ASTM, NACE/AMPP), it is provided strictly for educational, preliminary scoping, and reference purposes. It does not constitute formal professional engineering advice, procedure qualifications (WPS/PQR), or certified inspection sign-offs. Always verify testing parameters, wall thickness sizing, and flaw acceptance criteria against the latest governing code edition and consult a certified Level III, Professional Engineer (PE), or certified inspector (API 510/570/653, AWS CWI, CSWIP) prior to field execution.