Services

Specialized & Advanced Inspection

Screening, mapping and material verification techniques applied where conventional spot inspection alone does not answer the integrity question.

Capabilities

Targeted Techniques for Difficult Scopes

Availability of each technique is confirmed against the specific scope, equipment requirement and personnel certification at enquiry stage.

GWT

Rapid screening of long pipe runs from a single test location to identify areas requiring detailed follow-up inspection.

Working Principle: Low-frequency guided ultrasonic waves propagate along the pipe wall. Reflections from cross-sectional changes indicate features and potential metal loss.
Typical Indications: Areas of metal loss
Corrosion under insulation indications
Cross-section changes
Applications: Insulated pipe runs
Road and pipe rack crossings
Buried and inaccessible sections where applicable
Equipment: Guided wave collars and instrumentation appropriate to pipe diameter and coating.
Reporting: Screening results with distance-referenced indications and follow-up recommendations.

Guided wave is a screening technique; indications are normally confirmed by direct inspection methods.

Encoded ultrasonic thickness mapping to quantify and visualise the extent of wall loss over a defined area.

Working Principle: Automated or semi-automated scanning captures thickness data on a grid, producing a colour-coded thickness map of the inspected area.
Typical Indications: Localised pitting
General wall thinning
Erosion-corrosion patterns
Applications: Vessel shells and heads
Tank floors and shells where accessible
Piping and elbows
Equipment: Encoded scanners with ultrasonic instrumentation configured for thickness acquisition.
Reporting: C-scan thickness maps with minimum thickness values and area references.

In-situ hardness measurement to verify material condition after welding or heat treatment.

Working Principle: Portable hardness testers apply a controlled indentation or rebound measurement, converted to a hardness scale.
Applications: Post-weld heat treatment verification
Weld and heat-affected-zone checks
Material condition assessment
Equipment: Portable hardness testers suited to the component geometry and surface condition.
Reporting: Measured values against the specified hardness limits for the material and procedure.

PMI

Verification of alloy composition to confirm that installed materials match the specification.

Working Principle: Portable analysers determine elemental composition, allowing the alloy grade to be identified or verified on site.
Applications: Incoming material verification
Weld consumable and installed alloy checks
Material traceability programmes
Equipment: Portable alloy analysers with calibration verification.
Reporting: Component-referenced composition results and grade confirmation.

HDT

Detection of discontinuities in protective coatings and linings prior to service.

Working Principle: A test voltage appropriate to the coating thickness is applied across the coating; a discharge indicates a discontinuity.
Applications: Pipeline coatings
Tank and vessel linings
Structural protective coatings
Equipment: Low- and high-voltage holiday detectors set to the coating specification.
Reporting: Location and quantity of discontinuities with repair references.

Execution

Describe the asset, the damage mechanism of concern and the access constraints.