Arrays of sensors allow for leak and crack propagation detection on critical pipelines. This technique is most commonly implemented in areas of concern either in the form of permanent online monitoring or temporarily during start-up or shut-down procedures. This technique has a unique synergy with pressure tests as it can provide defect propagation information during the pressure test.
Dolphin G3 / Duet Tube Inspection
The Dolphin G3™ is a non-invasive inner tube material inspection solution for tubes smaller than 4” inner diameter. The Dolphin G3™ allows for fast inspection of boilers, fin-fans and other heat exchangers regardless of tube shape or material. For a more comprehensive inspection which includes the inner and outer diameter inspection the Duet™ system may be used.
The Duet™ System utilizes acoustic and ultrasonic inspection techniques to not only inspect the inner and outer diameter tube material, but also to detect any flow blockages in the tube. Both systems are simple to operate and achieve automated analysis and report generation, thus allowing for less dependency on operator expertise.
Automated UT - B/C Scan
Larger pipelines allow for a computer controlled crawler with magnetic wheels which allows for up to millions of ultrasonic thickness measurements to be taken without scaffolding or rope access requirements. On smaller diameter pipelines, a handheld UT thickness scanner may be implemented to obtain B-SCAN data.
PEC (Pulsed Eddy Current)
Failure of steel piping systems can be caused by corrosion of the steel under passive fire protection or insulation and visual signs of degradation may not be evident.
Pulsed Eddy Current (PEC) technology can help detect such hidden corrosion before it becomes a potentially expensive and hazardous problem. PEC utilizes changes in induced magnetic fields to obtain an average remaining wall thickness reading over a small area.
Guided Wave Ultrasonics (GUL)
The restrictions of traditional NDT inspection methods have prompted the use of Guided Wave UT (GUL) Inspection on large sections of piping systems. The benefits of this inspection over conventional NDT include:
- Large sections of piping can be inspected rapidly and safely often with no scaffolding
- Minimal insulation removal for Corrosion Under Insulation (CUI) inspections Localized damage can be pinpointed and characterised as to length and depth
A complete API570 inspection may be carried out along with calculations to provide a comprehensive fitness for service study on the pipeline.