During the day LBNiW’s inspectors would perform UT, MT, field hardness testing and PMI. Our service delivery included:
- UT of 1100+ welds
- MT of 1400+ welds
- HT of 1200+ welds
- PMI 200+ inspection points
We assigned two specialists with a broad spectrum of qualifications to perform daily tasks required by the project. All tests have been performed according to EN 12952-6 or EN 13480-5 and project’s test plan.
Magnetic particle testing and field hardness testing were performed on all PWHT joints. Hardness testing by ultrasonic contact impedance (UCI) method was used. Our hardness testing specialists are well-trained and experienced with the UCI method, additionally, our HT procedure takes into account additional considerations for hardness measurements on the P91 material grade that was used on superheaters and main steam pipes.
Ultrasonic testing was performed on welds above 8mm thick. 100% of welds on live steam lines were UT tested. The scope of UT testing on other piping systems would vary from 10% to 100% depending on the applicable EN norms or project’s test plan.
Positive material identification PMI on welds was primarily used to confirm that proper filler metals were used for critical welds. Random PMI testing was conducted on the superheaters and 100% verification on the main steam pipes.