Ultrasonic Testing (UT)
Internal flaw detection and thickness measurement for critical components.
UT supports weld inspection, lamination checks, thickness surveys and quality control for fabricated and in-service assets — with full traceability and documented reporting.
Overview
What our UT service covers
From single-weld inspection to full thickness-survey campaigns, we handle the complete UT workflow — equipment, personnel, reporting and follow-up.
What UT Detects
Ultrasonic Testing uses high-frequency sound waves to locate and characterise internal and near-surface defects that are invisible to the naked eye. Our technicians identify:
Applications
UT is suitable for a broad range of metallic and non-metallic components across fabrication, maintenance and statutory inspection scopes:
How We Work
Every UT job follows a structured, documented process to ensure repeatable, defensible results:
Reporting
All UT results are compiled into a formal inspection report including component identification, scanning coverage map, reflector details, acceptance/rejection per applicable code, and technician certification details. Reports include:
Techniques Available
UT methods we deploy
We select the most appropriate technique based on geometry, material and acceptance standard.
Pulse Echo (PE)
The standard single-probe technique for general weld and thickness inspection. Detects reflectors parallel and perpendicular to the beam path.
Tandem / Pitch-Catch
Two-probe configuration for detecting vertical planar defects in thick sections — especially effective on weld root and mid-wall cracks.
Angle Beam (Shear Wave)
Uses 45°, 60° or 70° probes to scan welds from the parent material surface, covering the full weld cross-section per AWS and ASME code requirements.
Straight Beam (Normal)
Detects laminations, inclusions and measures accurate wall thickness — ideal for plate inspection and pre-weld material verification.
Immersion UT
Component immersed in water for consistent coupling — used on forgings, bar stock and precision machined parts requiring fine-grain scanning.
Thickness Survey (CML)
Grid-based wall-thickness measurement at Condition Monitoring Locations (CML) for pressurised equipment and piping — supports RBI and corrosion trending.
Step-by-Step
Our inspection process
A clear, repeatable workflow ensures every inspection is safe, accurate and code-compliant.
Requirement Review & Procedure Preparation
We review client drawings, material certificates, applicable codes (ASME Sec V, IS 4260, AWS D1.1) and define the examination volume, probe selection, scanning pattern and acceptance criteria before mobilisation.
Surface Access & Preparation
Scanning surfaces must be free of loose scale, spatter and coatings that impair sound coupling. We verify surface condition, weld geometry and access clearances to plan the scan zone layout and probe angles.
Equipment Calibration
Flaw detectors are calibrated using code-specified reference blocks (IIW, DSC or customer-provided). Distance Amplitude Curves (DAC) or TCG corrections are established. All calibration records are retained as part of the inspection package.
Scanning & Signal Evaluation
Technicians scan the examination volume using the approved index point and beam angles. All indications exceeding the evaluation threshold are recorded with location, depth, amplitude and extent before applying acceptance criteria.
Flaw Characterisation & Sizing
Recorded indications are characterised by type (planar, volumetric, geometric) and sized using 6 dB drop, 20 dB drop or DAC-based methods per the applicable code to support accept/reject decisions.
Report Issue & Client Sign-off
A formal UT report is issued covering all examination details, calibration data, indication records, sketch of coverage, and final accept/reject conclusion signed by a certified Level II or Level III technician.
Codes & Standards
We work to your specification
Our procedures can be written and qualified to any of the following standards based on your project requirements.
Article 4 — UT for Pressure Vessels & Boilers
Div 1 & 2 — Pressure Vessel Fabrication
Structural Welding Code — Steel
Indian Standard for UT of Welds
UT of Welds — General Rules
UT of Fusion-Welded Joints
Piping Inspection Code — In-service
Welded Tanks for Oil Storage
Industries Served
Sectors we inspect across Maharashtra
Our UT teams are experienced across the full range of industrial fabrication and in-service inspection environments.
Oil & Gas / Petrochemical
- Pressure vessel fabrication QC
- Pipeline girth weld inspection
- In-service corrosion survey
- Tank floor & shell inspection
Power & Energy
- Boiler drum & header welds
- Turbine shaft & rotor inspection
- Steam pipe thickness survey
- Heat exchanger tube inspection
Heavy Engineering & Fabrication
- Structural steel weld QC
- Crane & lifting equipment
- Forging & casting inspection
- Pre-weld material lamination check
Automotive & Manufacturing
- Component weld inspection
- Axle & driveshaft flaw detection
- Die and mould inspection
- Incoming raw material verification
Infrastructure & Construction
- Bridge structural weld audit
- High-rise structural connection QC
- Pre-stressed concrete duct inspection
- Anchor bolt & rebar testing
Pharmaceuticals & Food
- SS vessel & reactor weld QC
- Hygienic piping inspection
- Thickness survey for corrosion control
- Regulatory compliance documentation
Get a Quote
Request your UT inspection quote
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