Phased Array or TOFD Ultasonic testing

[ndeguy]

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

 

[doct9960]

Nigel,

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...

http://www.asnt.org/publications/materialseval/solution/jan05solution/jan05sol.htm

 

[MBlanchet]

Nigel,

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

http://www.harfangmicro.com