- CLEANING & GAUGING
- CALIPER INSPECTION
- MFL INSPECTION
- TFI INSPECTION
- ULTRASONIC INSPECTION
- ULTRASONIC CRACK DETECTION
- EMAT INSPECTION
- TUBING INSPECTION
- PIPELINE INTEGRITY
- PETROTECH INTEGRITY SOFTWARE
- PIPELINE REPAIR
Our ultrasonic crack detection solutions focus mainly on liquid product pipelines, such as oil, petroleum products, water, free from gas ingress, or homogeneous liquid. In the case of gas pipelines, it is possible through liquid batching to adapt the process performance and provide accurate data collection and reporting.
INSPECTION & ACCURATE CRACK DETECTION
• During pipeline construction as a result of fabrication or welding (causing shrinkage crack in the vicinity of girth weld, lack of fusion, hook cracks, gouging)
• During pipeline operation due to mechanical stress or damage (causing fatigue cracks)
• With time due to corrosion (whether galvanic, process-related or environment-related)
Petrotech provides recommendations to the client to ensure prudent QA/QC procedures that minimize the creation of such structural anomalies during line pipe procurement and pipeline construction. Once a pipeline is commissioned ILI provides reliable means to identify the formation or propagation of such cracks or crack-like features before they become high risk for pipeline integrity.
Ultrasonic Crack Detection (UTCD) has been developed based on the basic principle of wall thickness measurement of pipelines through the use of Piezoelectric transducers – Piezoelectric crystals undergo a repeated change in size and shape with the application of AC voltage causing oscillation and generation of ultrasonic sound frequency.
These signals require a single-phase liquid medium between the transducer and pipe wall to filter noise during pulse-echo operation. For quickly scanning of a pipeline for wall thickness, a number of such transducers are mounted on an ILI tool perpendicular to the pipe wall surface. The ultrasonic pulse generated by the transducer is partially reflected by the inner pipe wall and partially reflected by the outer pipe wall thus causing a time differential for the return path of two echoes.
Petrotech developed its UTCD tool based on pulse-echo UT with maximum sensor spacing at 4mm for circumferential as well as longitudinal crack detection. This means that our UTCD tool provides unmatched resolution and the highest possible probability of crack (and metal anomalies) detection in the market for a single ILI run.