Pressure vessel's welds are often thick, so are the welds on bigger diameter pipes meant for high pressure services. Inspection of these welds with radiography testing require long exposure times. The speed of construction today and the criticality of these equipments require high accuracy defect sizing and high inspection speed.
TIME OF Flight Diffraction (TOFD), the most advanced method of ultrasonic testing used in different oil and gas sectors is the one point solution for this problem.
This principle applies two ultrasonic probes on either side of the weld. Defect sizing is based on position mapping of the diffraction signals.
Our trained and experienced team of engineers headed by ASNT Level III is able to detect and size accurately the defects in welds of pipes or plates of carbon steel, alloy steel and duplex stainless steel materials.
With the help of most advanced software immediate on screen results, hard copy print outs can be provided.
Phased array is widely used for nondestructive testing (NDT) in several industrial sectors, such as construction, pipelines, and power generation.
This method is an advanced NDT method that is used to detect discontinuities i.e. cracks or flaws and thereby determine component quality.
Due to the possibility to control parameters such as beam angle and focal distance, this method is very efficient regarding the defect detection and speed of testing.
Apart from detecting flaws in components, phased array can also be used for wall thickness measurements in conjunction with corrosion testing.
PAUT can be performed on carbon, steel, stainless steel, DSS, ASS. Pipe dia-0.84 inches to flat surface.
Corrosion Mapping by ultrasonic's is a nonintrusive technique which maps material thinness using ultrasonic techniques. Variations in material thickness due to corrosion can be identified and graphically portrayed as an image.
The technique is widely used in the oil and gas industries for the in-service detection and characterization of corrosion in pipes and vessels. The data is stored on a computer and may be color coded to show differences in thickness readings.
U-Sonix has got the following the corrosion mapping solutions.
Although most ultrasonic flaw detection and thickness gaging is performed at normal environmental temperatures, there are many situations where it is necessary to test a material that is hot. This most commonly happens in process industries, where hot metal pipes or tanks must be tested without shutting them down for cooling, but also includes manufacturing situations involving hot materials, such as extruded plastic pipe or thermally molded plastic immediately after fabrication, or testing of metal ingots or castings before they have fully cooled. Conventional ultrasonic transducers will tolerate temperatures up to approximately 50℃ or 125℉. At higher temperatures, they will eventually suffer permanent damage due to internal disbonding caused by thermal expansion. If the material being tested is hotter than approximately 50℃ or 125℉, then high temperature transducers and special test techniques should be employed.
This application note contains quick reference information regarding selection of high temperature transducers and couplants, and important factors regarding their use. It covers conventional ultrasonic testing of materials at temperatures up to approximately 500℃ or 1000℉. In research applications involving temperatures higher than that, highly specialized waveguide techniques are used. They fall outside the scope of this note
Performing ultrasonic phased array inspections on high-temperature parts and components poses certain challenges. Piezoelectric elements and internal connections in typical phased array probes are sensitive to heat and can be damaged by high temperatures. To help mitigate this problem, Olympus developed a new tool that enables manual phased array inspection at temperatures up to 150℃