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Hi-Spec Systems
we are specialised in the design, development and manufacture of Phased Array and Time-of-Flight Diffraction (ToFD) ultrasonic inspection systems.
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Technical Discussions
Fred Schuster
Consultant,
Canada, Joined Dec 2015, 3

Fred Schuster

Consultant,
Canada,
Joined Dec 2015
3
18:52 Dec-27-2015
crack in Jumbo beam access hole

I was inspecting a w14x342 column per AISC Specification for Steel Buildings, J1.6 "heavy shapes" with MT.

A 8mm crack turned up traverse to the web in the base metal. I had the welder grind it a little bit and it continues. Now I can have the shop extend the access hole dimension following AWS D1.1, 5.17 dimension limits. However is there a way with AWS D1.1 shear wave probes I can present to the EOR to locate the extent of the crack in the base metal?

 
 Reply 
 
Babu
India, Joined Oct 2015, 8

Babu

India,
Joined Oct 2015
8
10:52 Dec-29-2015
Re: crack in Jumbo beam access hole
In Reply to Fred Schuster at 18:52 Dec-27-2015 (Opening).

Dear friend,

Why can't you use the PT to check the depth of the crack approximately. i.e (width of the bleed out penetrant = depth of the crack).

Regards,

K.Babu

 
 Reply 
 
Michel Couture
NDT Inspector,
consultant, Canada, Joined Sep 2006, 889

Michel Couture

NDT Inspector,
consultant,
Canada,
Joined Sep 2006
889
15:04 Dec-29-2015
Re: crack in Jumbo beam access hole
In Reply to Babu at 10:52 Dec-29-2015 .

Babu,

Can you explain to me your bases for estimating the crack depth with PT based on the width of the crack being equal to the depth. From everyone I know, PT has been known as a method where depth cannot be evaluated.

 
 Reply 
 
Babu
Babu
16:35 Dec-29-2015
Re: crack in Jumbo beam access hole
In Reply to Michel Couture at 15:04 Dec-29-2015 .

Dear Sir,

I have already told it is approximately equal. I knew it we can not judge exact depth of the crack.

Regards,

K. Babu.

 
 Reply 
 
Fred Schuster
Consultant,
Canada, Joined Dec 2015, 3

Fred Schuster

Consultant,
Canada,
Joined Dec 2015
3
20:59 Dec-29-2015
Re: crack in Jumbo beam access hole
In Reply to Babu at 16:35 Dec-29-2015 .

zoom image



Actually the 8mm was smaller. I was estimating it. It was maybe 75% of the web thickness.
 
 Reply 
 

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