Initially, the main method was conventional ultrasonic testing, but other techniques that have been evaluated in the intervening years include radiographic testing and thermography. However, the principal technique since 2003 has been phased array ultrasonic testing (PAUT), primarily for the inspection of plastic pipe joints.
The increasing number of applications for plastic material has demanded the development and evaluation of new inspection techniques, and TWI continues to explore new and improved ways of carrying out NDT on plastics.
Phased array ultrasonic testing inspection of polyethylene pipe joints
TWI has optimised inspection techniques and systems for the inspection of plastic pipe joints for a large range of material grades and pipe sizes. The PolyTest inspection system enables the testing of pipelines in situ, without the need for downtime.