Advanced Ultrasonic Methods

Phased Array Ultrasonic Testing (PAUT) has become the new standard for ultrasonic weld examinations and an excellent way to perform high resolution corrosion mapping. 

This method uses an array of elements housed in a single probe that are pulsed by a computer to generate a desired ultrasonic beam.  An image is produced which aids in the characterization and sizing of flaws. PAUT can be digitally stored for review and permanent record.   

 Time of Flight Diffraction (ToFD) provides excellent detection and height sizing of flaws through the use of diffracted energy. ToFD is an excellent compliment to PAUT examinations.

Unlike UTSW and PAUT which use reflected ultrasonic energy, ToFD utilizes diffracted ultrasonic energy that emanates off the tips of flaws. With the use of the pitch-catch transducer setup and an amplifier, a gray scale B-scan image can be produced that provides height sizing accuracy of plus or minus 1 mm (reflective sizing can be accurate to plus or minus 3-4 mm). 

Automated ultrasonic Testing (AUT) is a type of ultrasonic testing technique that utilizes computerized methods to drive the ultrasonic scanning device around the part being scanned. Automated ultrasonic testing may include computer software that helps technicians while scanning a metal piece for defects. AUT lowers the ultrasonic scanning time for multiple applications.

Guided Bulk Wave (GBW) testing, also known as Short Range Ultrasonic Testing (SRUT), is a technique used to inspect the area near a transducer. It is a screening method that can detect discontinuities like corrosion, pitting, and erosion in walls with a thickness of 6 to 25 millimeters. SRUT is ideal for quickly detecting corrosion and erosion in accessible areas, such as annular rings, braces, brackets, saddles, and legs. 

Long Range UT (LRUT) Uses guided waves to cover long distances of material from a single inspection point. Long range ultrasonic testing provides rapid screening for corrosion and erosion in pipelines. Long range ultrasonic testing (LRUT), also known as guided wave ultrasonic testing, is a fast and cost-effective method for inspecting long lengths of pipe.  

  UTSW is an economical way for a full body weld examination, either in-service or new construction. 

This method uses a single element transducer to generate ultrasound that passes through the weld volume. Flaws can be characterized and height sized using an A-scan signal.