Large Tanks with Water from Reverse Osmosis Evaporators

April 5, 2009

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1.1 This T&E PPI provides requirements for cleaning, surface preparation and painting of potable water tanks, 1000 gallons or larger, that are filled with water from reverse osmosis evaporators.

The coating described herein is NOT to be installed in smaller tanks, and should not be put in potable water tanks with ships that have flash type evaporators.

4.14.1 Prior to use, painting equipment (pumps, hoses, and so forth) shall be flushed clean to remove any residual contaminants or other foreign matter.

4.14.2 Cleaner used shall be as recommended in the paint manufacturer’s ASTM F 718 sheets, Ref.

MAINTAIN AMBIENT AND SUBSTRATE TEMPERATURE OF AT LEAST 50ยบ F OR HIGHER THROUGHOUT CURING.

7.2 DRY FILM THICKNESS MEASUREMENTS: Accomplish IAW Ref 2.b, record measurements in Appendix 4.

Curing time may be accelerated only by increasing the substrate temperature IAW “Curing Table” of Ref.

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