100% volumetric coverage of plate, forging, pipe, and component material at sensitivity levels and spatial resolutions that contact UT cannot consistently achieve — detecting inclusions, laminations, segregation bands, and internal discontinuities that determine whether a material is genuinely fit for its intended application.
Material quality cannot always be
verified from the surface. Inclusions, laminations, segregation bands,
porosity, and internal discontinuities that determine fitness for specific
applications are only accessible to volumetric inspection — and only detectable
at the sensitivity and spatial resolution that immersion scanning provides.
Immersion UT scanning submerges
the component in a water bath and scans it with a focused or unfocused UT beam
under computer control. The water coupling provides consistent, highly
reproducible acoustic coupling across the entire scan surface — eliminating the
couplant variability and probe contact pressure variation that limits contact
UT sensitivity on large areas. Scan parameters — transducer frequency, focus
depth, index pitch, and scan speed — are selected and documented for each
material type and inspection objective.
The result is 100% volumetric
coverage at sensitivity levels and spatial resolutions substantially better
than contact UT can achieve on the same material — with every detected
indication three-dimensionally located, sized, and reported against the applicable
material specification acceptance criteria.
•
Incoming plate and forging
material qualification inspection — pre-fabrication acceptance
•
Seamless and welded pipe
volumetric inspection for high-consequence applications
•
Aerospace and defence
material acceptance testing — airframe, engine, and structural components
•
Nuclear and high-integrity
pressure vessel component material analysis
•
Clad and lined material
bond integrity assessment — explosion-bonded and weld-overlay clad plate
•
Failure investigation —
internal discontinuity characterisation and fracture origin identification
•
Research and development
material characterisation — new alloy qualification and process development
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ASTM A435 — Standard
Specification for Straight-Beam Ultrasonic Examination of Steel Plates
•
ASTM A578 — Standard
Specification for Straight-Beam UT Examination of Rolled Steel Plates for
Special Applications
•
ASTM E114 — Standard
Practice for Ultrasonic Pulse-Echo Straight-Beam Contact Testing
•
ASTM E1001 — Standard
Practice for Detection and Evaluation of Discontinuities by the Immersed UT
Method
•
EN 10307 — Non-destructive
testing — Ultrasonic testing of steel flat products of thickness ≥6mm
•
ISO 10893-8 —
Non-destructive testing of steel tubes — UT for the detection of laminar
imperfections
•
ISO 17025 — Laboratory
accreditation requirements for all scanning operations