Weld defects in new build for CCG

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JK
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Weld defects in new build for CCG

Postby JK » Sun Aug 19, 2018 4:05 am

44 meters of weld defects.
The ship was floated out months ago and sent to Victoria for outfitting.
Big $$ involved.

https://www.cbc.ca/news/politics/shipbu ... -1.4788322

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The Dieselduck
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Re: Weld defects in new build for CCG

Postby The Dieselduck » Sun Aug 19, 2018 7:44 am

<facepalm>
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Merlyn
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Re: Weld defects in new build for CCG

Postby Merlyn » Sun Aug 19, 2018 10:16 am

It's that old adage yet again?
" Birdshit Welding "
Remembering The Good Old days, when Chiefs stood watches and all Torque settings were F.T.

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JK
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Re: Weld defects in new build for CCG

Postby JK » Mon Aug 20, 2018 5:46 am

The Dieselduck wrote:<facepalm>



Exactly!
access tanks, remove outfitting, weld grinding, reweld, retest, reinstall, recoat, heat affected zones.

It is LR oversight, so there must have been QA involved. Was it the yard or outside contractors? I wonder how many lawsuits are happening right now.

Plus they started the 2nd ship, probably cutting for the 3rd ship.
The implications are staggering.

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Big Pete
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Re: Weld defects in new build for CCG

Postby Big Pete » Mon Aug 20, 2018 10:22 am

As I understood the original article, it was fully automated Robot Welding, so it should have followed the programmed procedures exactly, so what caused the problem??
Excessive welding current set on machines? Wrong choice of welding wires? or poor quality plate/ filler rods? Did they increase the welding current, transit speed and feed to try and weld faster to meet production targets?

Lots of questions, we will all have to wait for the answers, if we ever get any.

BP
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JK
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Re: Weld defects in new build for CCG

Postby JK » Wed Aug 22, 2018 4:05 am

It would all go back to the original weld procedures and if they were followed.
In Canada we have the CWB, the Canadian Welding Board, which regulates the industry, the training of apprentices,weld inspectors, standards and procedures.
Then there is Class inspection, in this case LR, which may be someone who isn’t a weld inspector following Class rules. I’d be curious how they are managing that because I’m sure CWB would not be eager to have the welding industry standards upset by government building ships. It’s a conundrum.
I hope it does come out. CBCs reporting is sadly lacking, there’s no investigative journalism anymore. They accepted at face value the yard comments.


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