Short Range Ultrasonic Testing (SRUT)
Short-Range Guided Wave is a technique which uses low frequency sound waves to flood the wall thickness of a pipe or a plate, and then reflect back at interfaces such as cracking or corrosion/pitting. This technique is to be used as a screening tool used on wall thickness range of 6 to 16 mm. Generally detected discontinuities are reported in the percentage remaining wall thickness and categorized into various severity level. This test method can locate the discontinuity location and size to an accuracy of ±10%.
Advantages of TOFD
- Most ideal for rapid detection of corrosion and erosion including sizing in accessible areas for up to 2metres length under structures e.g. Annular rings, Braces, brackets, saddles, legs etc.
- Tank Floor Annular Plate Testing
- Testing Concrete Coated Interfaces
- Testing Under Pipe Supports
- Tank Dyke Piping Interfaces
- Scan Under Vessel Supports.
Limitations:
- Short Range Ultrasonic testing (SRUT) can be conducted at ambient temperature only.
- Wall thickness measurement accuracy is ±10% as compared to conventional ultrasonic testing.
- Although SRUT can detect discontinuities on the internal or external wall, this test method cannot discriminate between the inner wall or outer wall discontinuities.
- Short Range Ultrasonic testing (SRUT) can be conducted on 6 to 16 mm thickness range
