Coating/Lining of Drain Pit 1

[nickypaliwal]

Our client has a pit with HCL, NaOH, NAOCL, FeCl3 coming from different lines in different proportions in a concrete tank.

Which type (coating or lining or composite) and material of protection should be provided to prevent the concrete surface. Similar damage has occurred in an already existing pit with similar chemicals.

 

[EdStainless]

An acid resistant lining.
Look for ones suitable for use with the HCl.
There are some multilayer epoxy systems that might be suitable for this service.

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Plymouth Tube

 

[SJones]

Start with EN 14879-1, 14879-3 and 14879-5 as the opening requirements for discussion with suppliers and applicators. Then assess the qualifications of the products and the application personnel to arrive at a final choice.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

 

[nickypaliwal]

I have gone through EN 14879-1/3/5. I did not understand from the codes that which lining needs to be applied. It talks about whether we cn go for coating or lining. Also talks about method of application but do not tells about the material of lining. It has given options of PVC, HDPE etc. But does not specify the material for use with particular chemicals.

 

[SJones]

I omitted EN 14879-6 - Combined lining with tile and brick layers which will add to your selection quandary. The protection system that needs to be selected is the one that offers the required performance for the lowest life cycle cost. So, you will need objective evidence of system performance in the identified chemicals, operational damage tolerance, maintenance requirements and so on. It would be a good idea to start gathering such data from manufacturers and suppliers. For coatings, Part 3, clause 8 details the testing and data requirements for suitability verification. The failure analysis of the indicated incident would also be helpful in preventing repetition. Sub-subclause 3.2.1 of the end user's specification might also provide sufficient guidance to make a selection.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

 

[rajenmenon13]

A combination of vinyl ester thick film lining with acid resistant tiles on top would be a good option depending on severity of different acid content.

 

[URIEng]

Also consider polyurea specifically tailored to the situation. Nukote XT+ would probably be the one, but before talking to anyone try and get percentage ranges of the chemicals and temperature as they have other products that may be more specifically suitable. Polyurea will be a one pass, fast return to service solution, and if specified correctly should outlast the epoxy solutions many times over.

 

[bimr]

Atlas makes a nice product for that application:

http://www.atlasmin.com/products/corrosion_resistant/linings_membranes.asp

 

[KyleFlanagan]

Hi Nicky,

Do you know what the concentrations of chemicals listed are? Belzona supply epoxy linings which are used frequently for protection of primary and secondary containment areas against such chemicals. If you can provide some more information or drop me an email we can help out; kflanagan@belzona.com

 

[nickypaliwal]

Hi Kyle, I am aware of a few products of Belzona. I worked in RIL and have some experience with Belzona coating. However I have not experienced any coating for Drain Pit. Can you throw some light on your product.