Ultrasonic characterization of the PVC welded materials

Article refers to ultrasonic parameters identification and measures the relevant ultrasonic parameters in the detection of the integrity state of the welded materials pipe type from plastic PPR. To achieve the target values for acoustic parameters in case of ultrasonic wave propagation through studied samples literature review was performed first. There were identified the main elaboration processes of polyvinyl chloride, possible welding techniques, specific defects that may occur after joining processes as well as their ultrasound manifestation. There are presented the theoretical considerations regarding ultrasound propagation equations in samples in order to create theoretical model of the welded joint with related acoustic parameters. An experimental plan was then realized to determine the integrity state of the joined material on different welding regimes. It was also designed and realized a semi-automated ultrasonic control system A Scan type and B Scan type to simplify and streamline control operation. At the end, conclusions are taken regarding the quality of the joint of the plastic PPR pipe type samples by studying their acoustic parameters.