_JPG.jpg)
Long Range Ultrasonic Testing (LRUT)
Long range ultrasonic testing is a rapid way of screening for corrosion in pipelines. The method enables screening of up to 100 meters of pipeline in one test, i.e. 50 meters in both directions. With this highly advanced testing method, customers will receive an accurate status report of their pipelines. The Long Range Ultrasonic Technique (LRUT) is designed to inspect 100% of a pipe segment from one single location.
Benefits of GWUT:
-
More than 100 times faster than traditional ultrasonic methods
-
Up to 100 meters screening distance on pipelines above ground
-
Up to 10 meters screening distance on pipelines buried in the ground
-
Possibility to do sub-sea scanning
-
Saves time since there is no need to remove insulation, apart from 1 meter for the transducer ring
-
Easy to screen wall penetrating pipelines (both built-in and sleeved penetrations)
Guided Wave Ultrasonic Testing (GWUT)
Guided waves are a form of ultrasonic waves which are sent along the length of a pipe to get information about the condition of it. The Rapid Flow Pipe Screening System is placed around the pipe and guided waves are sent in both directions along the pipe.
_jp.jpg)
Benefits of GWUT:
-
In-service Inspection
-
Reduction in cost of gaining access to the pipes for inspection.
-
Avoidance of removal and reinstatement of insulation or coatings (where present), except for the area on which the transducers are mounted.
-
The ability to inspect inaccessible areas, such as at clamps and sleeved or buried pipes.
-
The whole pipe wall is tested, thereby achieving a 100% examination.
Torsional or longitudinal guided waves are induced into the pipe body and propagated along the entire pipe segment under inspection. When these guided waves identify an anomaly or a pipe feature, they convert into laminar waves and reflect back to the tools’ original location. Using a laptop, these signals are digitally captured. The time-of-flight for each signature is calculated to determine its distance from the tool. The cross-sectional area is calculated by amplitude followed by estimating the circumferential extent by the focused beams (broken down into octants) to determine the significance of the defect.
GWUT’s primary application is in the Oil and Gas Refining, Petrochemical, Storage, Offshore and Pipeline Transportation industries among others. More specifically, the tests are used as part of ECDA and ICDA methodologies where access to piping systems are difficult such as:
-
Insulated Pipe in Refineries
-
Offshore Pipeline Risers
-
Cased Road or Railway Crossings
-
Loading Lines and associated Pipework
-
Tank Dyke Pipeline Crossings
-
Above Ground or Buried Flow Lines
-
River or Bridge Pipeline Crossings
