LINING OR CLADDDING 1

[GabrieleB]

I have to specify internal surface protection for a carbon steel filter. The filter is working on a very high pressure (180 barg) and 80 °C temperature and is working with injection water an high percentage of chlorides.
To protect the internal surface I would suggest to use a cladding material like AISI 316 since a very high pressure service is usually not indicated for internal lining like glass flake or other lining material.
Anyway the Enginnering company has suggested the Vendor to use the glass flake. I'm not agree with this decision and my opinion is to go ahead with internal cladding, are you agree?
Thanks for responde.

Bye

 

[gr2vessels]

Gabriele,
Your determination is very strong and should be supported with a little bit of engineering.
The 316 cladding at 80 degt C and high??! percentage of chlorides is not suitable for your application. Please review the engineering recommendations for limits of use that 316 stainless steel in your environment. Perhaps a safe option could be the glass flake cladding or higher alloy cladding material for your filter.
If you'd give us the 'high percentage' chlorides value, I'm sure you could get some real good advice from this forum, plus the chance to learn some corrosion protection.
Cheers,
gr2vessels

 

[GabrieleB]

Chlorides content is tipical for a produced water (130.000ppm) but I forgot to highlight that oxigen content is taken at very low levels to avoid any problem with AISI 316 cladding material regarding pitting or Chlorides Stress Corrosion Cracking. Anyway what I know about internal lining is that with very high pressure and depressurization you may have big problems with internal coatings. What do you think about.

Thanks

 

[AK23Static]

GabrieleB,
I agree with you, internal linings during depressurization will not sustain. Further just to support your claim check if there is any Full vacuum design requirement wherin this internal linings will not survive for sure.

regards,
AK

 

[metengr]

If the stated chloride level is 130,000 ppm and not 130 ppm at 80 deg C and you have a near neutral pH, I would use C-276 cladding.