Phased Array or TOFD Ultasonic testing
Phased Array or TOFD Ultasonic testing
(OP)
Has anybody come across either of these methoods being used on AWS D1.1. structures, either alone or supported by Pulse-Echo? I dont have a copy of AWS D1.1 to hand - is there any mention of these methods in the spec?
Nigel Armstrong
Karachaganak Petroleum
Kazakhstan





RE: Phased Array or TOFD Ultasonic testing
I have a copy of AWS D1.1:2000. Annex K describes alternative techniques for UT, but it does not specifically mention phased array or time of flight diffraction.
This ASNT article might give you some insights... ht
RE: Phased Array or TOFD Ultasonic testing
The copy of AWS D1.1:2006 does mention both Phased Array and TOFD techniques in the section 6.36 Advanced Ultrasonic Systems.
These alternative methods can be used in a proposed procedure that the Engineer has to approve. Phased array can show “experimental evidence” that the required beams can be provided as per code requirements. S-scan and L-scan imaging just happen to offer more beams than those requested.
Marc-Antoine Blanchet
HARFANG Microtechniques Inc
www.harfangmicro.com