WFMT 2

[Corgas]

We need to inspect several pressure vessels using WFMT.

It is not a secret that surface preparation is critical to the sensitivity of this NDE method.

At the same time, we want to reduce downtime due to surface prep.

Can you share what preparation methods are you using?

Thanks,

Corgas

 

[metengr]

Grit blast or flapper wheeling with care to avoid polishing surface oxide.

 

[Corgas]

metengr :

we use both too.

any particular brand of grit blast that you prefer?

Thanks,

Corgas

 

[metengr]

Corgas;
It has been a while; I believe it is still black beauty (sp ?) because it really does a nice job of cleaning heavy oxide build-up on power boiler and piping components. Just curious, are you in Power Generation or petrochemical sector?

 

[Corgas]

Background is Chemical and Petrochemical but switched to oil & gas....

we are going in to check for Wet H2S cracking.

By the way, all the links that you post are very usefull!!!

Thanks,

Corgas

 

[stanweld]

Corgas,
In your case, solvent cleaning & power wire brushing will normally suffice. If you have scaling, refer to metengr.

Are you ispecting the entire vessel ID surface or the usual suspects (nozzle welds)?

 

[Corgas]

stanweld (Materials):

Partial inspection, basically due to extend of normal surface preparation

Thanks,

Corgas