Protective coating inside of Potable water tank

[ak1965]

We have a water tank that stores water for plant process aswell as drinking purpose. the tank is rmajor repair.

We need to protect the inside of this tank and wish to use a good protective coating that would not affect the potable water quality also.


Please suggest is it allowed to apply protective coating inside of a drinking water tank? if not, what is the alternative??

 

[hokie66]

Did you try a search of the site? There was a recent discussion on this very forum about coatings in potable water tanks.

 

[ak1965]

In view of the carcenogenic properties, Are Coal Tar coatings still allowed inside potable water tanks?

 

[babouic]

From TOTAL painting spec GS-EP-COR-352

Drinking water tank
Epoxy INTERLINE 975 400microns " The Water Quality Center certificate ref: P22368/C23593/2400
Epoxy Carboguard 891 2*125 microns " Health and safety report No AWWA C210"
Epoxy Cleankeep 550 cream 2*200microns " NSF certificate n° PM367 dated May 27, 2010"
...

ExxonMobil GP 29-02-02
Potable Water
NSF Epoxy Tankguard 412 2*200microns
NSF Epoxy Sigmaguard CSF 585 2*200microns
...

Chevron COM-SU-2.02-B
NSF approved Epoxy Amercoat 395FD 2*150microns
Hempel 85671 2*150microns
...

No coal Tar inside potable water tank.

 

[TomDOT]

I would definitely NOT use coal tar inside a potable water tank!

Epoxies are common, 100% solids epoxies are preferable - I've had reports on some certified potable water epoxies which were installed in cold weather with poor ventilation. Notable water quality complaints (taste, odor) resulted.