Bridge and Structural Inspection
Inspections are an integral process for the effective management of bridges.
Tru-Tec NDT provides comprehensive structural surveys and inspections to comply with statutory requirements. Bridge Inspections are an integral process for the effective management of bridges as stipulated in the code of practice for the management of highway structures.
Tru-Tec NDT provides inspections and surveys for:
Arch Bridges, Truss Bridges, Cantilever Bridges, Ties arch Bridges, Suspension Bridges and Cabled Stayed Bridges.
Each type of bridge requires different inspection methods and techniques which are systematically planned and applied by our ISO 9712 & ASNT Level 3 services department to ensure the methods applied are code compliant, effective and efficient.
Volumetric examination methods:
Volumetric inspections are implemented to ensure products are acceptable and are compliant to the required acceptance criteria using:
Manual Ultrasonic Testing (UT) – applied for the inspection of Weldments, corrosion mapping, thickness examination and lamination inspections.
- Time of Flight Diffraction (TOFD) – TOFD transmits ultrasonic waves which are diffracted and reflected sound waves separated by time. The difference in time is used to locate and size discontinuities. TOFD is used in the examination of piping and pressure vessels because of its advantages over pulsed echo which include, speed, objectivity, repeatability, insensitivity to weld surface condition and discontinuity orientation. Assessment of results can be interpreted in real time or recorded for post examination review. This technique can utilise automatic scanning system with an encoder to confirm 100 % coverage and eliminate human error.
Phased Array Ultrasonic Testing (PAUT) – PAUT uses phased array beams which can be steered, scanned, swept and focused electronically, unlike conventional single probe ultrasonic testing. The technique can be used for the inspection of welds, Wrought products and castings. Assessment of results can be interpreted in real-time or recorded for post-examination review. This technique can utilise automatic scanning system with an encoder to confirm 100% coverage and eliminate human error.
Radiography Testing (RT) – Applied to the examination of weldments.
Computer Radiography Testing (CRT) – Applied to the examination of weldments.
Surface examination methods:
Surface inspections are implemented to ensure products are acceptable and are compliant to the required acceptance criteria using:
Magnetic Particle Testing (MT) – Applied to Ferrous material, MT can be carried out using colour contrast and fluorescent techniques using portable yokes.
Liquid Penetrant Testing (PT) – Applied to non-ferrous material, PT can be carried out using colour contrast and fluorescent techniques.
Visual Testing (VT) – Applied to all material ensuring the surface condition is suitable for examination and ensuring visible defects are not present. Tru-Tec NDT also remotely visual examines internal bores and weldments using borescopes, which can record examinations.
Eddy Current Testing (ET) – Applied to coated surfaces, ET can effectively and efficiently detect surface breaking discontinuities without the need for coating removal and re-application.
Alternating Current Field Measurement (ACFM) – Applied to coated surfaces, ACFM can effectively and efficiently detect surface breaking discontinuities without the need for coating removal and re-application. ACFM can systematically measure the length and depth of surface-breaking discontinuities, which are recorded and reported for repeatable examination and remote witnessing/inspection of test results.
Drone Inspection – To employ remote visual inspection with thermographic imaging for surface breaking discontinuities. Tru-Tec NDT’s qualified personnel work in accordance with health and safety regulations, Civil Aviation Authority (CCA) & Permission for Commercial Operations (PfCO).
Hardness Testing – Tru-Tec NDT provides hardness testing in accordance with Rockwell, Brinell and Vickers.
Wire rope and cable examination.
Traditional wire rope inspection techniques do not adequately establish the internal condition of a wire rope. For rotation resistant, multi-strand ropes, difficulties in assessing the internal condition are of particular concern. Degradation of the inner strands will affect the distribution of forces in the rope, which significantly reduces the ultimate load-bearing capacity and increases the torsional moments on the outer strands, reducing fatigue life.
Tru-Tec NDT utilizes the latest cable inspection equipment to ensure 100% coverage of cable inspection detecting localised faults such as wire breaks and any loss in metallic area (LMA) caused by internal corrosion.