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Rented mule
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Glad to have you on the forum! I've used garnet as an abrasive and it works great compared to sand, it's hard, produces very little dust (read, you can see what the hell you're doing) and can be reused 2-3 times.
 

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Saw some chat on this site regarding soda blasting and decided to join up. Here's my company web site- http://www.garnetsales.com

I've attended a few NACE and SSPC shows and am learning from end users like those on this forum.
Welcome abrasive guy
If you really want to talk with abrasive people like me then you MUST go here http://www.contractortalk.com/f95/ where lots of end users hang out.
Garnet gets pretty dusty too especially when you recycle it but still a great media for many types of substrates.steel grit is much better for visabilty but limited to certain substrates and expensive stainless steel grit is great as well but very expensive.
 

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I mostly use the SSPC-AB Type 2 abrasive in the form of slag (Kleen Blast). It can't be recycled like Type 1 Garnet, but has less silica and can still produce a 2 mil profile on steel.
 

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Last sub sea job we did NDT on structural
steel. After sub sea abrasive blasting by commercial diver's they did magna flux to check for cracks.

Nothing like inspection work, this is a couple pic's of our blast equipment and abrasive.

You may ask why IR 750's, to blast at 4+ atmospheres it takes extra CFM to blast subsea. 2 compressors for redundancy.

The work was performed offshore platforms.

image-2481640157.jpg



image-2135333109.jpg
 

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robladd said:
Last sub sea job we did NDT on structural
steel. After sub sea abrasive blasting by commercial diver's they did magna flux to check for cracks.

Nothing like inspection work, this is a couple pic's of our blast equipment and abrasive.

You may ask why IR 750's, to blast at 4+ atmospheres it takes extra CFM to blast subsea. 2 compressors for redundancy.

The work was performed offshore platforms.
That is some serious stuff !!!
 

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Rob,

Do the divers also apply a coating on the exposed substrate at sub sea after the test blast, or do they wait for dry dock? I've heard of some coatings that can be applied under water.
 

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Last sub sea job we did NDT on structural
steel. After sub sea abrasive blasting by commercial diver's they did magna flux to check for cracks.

Nothing like inspection work, this is a couple pic's of our blast equipment and abrasive.

You may ask why IR 750's, to blast at 4+ atmospheres it takes extra CFM to blast subsea. 2 compressors for redundancy.

The work was performed offshore platforms.

View attachment 10072



View attachment 10073
Sounds like fun.
I wonder how a 36k + psi uhpw would work in that environment.
 

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CApainter said:
Rob,

Do the divers also apply a coating on the exposed substrate at sub sea after the test blast, or do they wait for dry dock? I've heard of some coatings that can be applied under water.
Not on this inspection job, NDT and magna flux. Checking for structural integrity of the platform and components.
 

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ibsocal said:
Sounds like fun.
I wonder how a 36k + psi uhpw would work in that environment.
We use Cavidyne blaster first to clean the inspected area. Then abrasive blast to give the profile for magna flux.

It's a 3 step process, the magna flux is electro static and the flux will fill in any hairline cracks
 

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CApainter said:
Rob,

Do the divers also apply a coating on the exposed substrate at sub sea after the test blast, or do they wait for dry dock? I've heard of some coatings that can be applied under water.
We will disconnect and bring parts to the service prep and paint with 3M Scotch Kote 323i pipeline coating and reinstall.
 
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