inspector, [and coating systems manufacturer's representative ]shall have a
pre-application coating preparatory meeting. This meeting shall be in
addition to the pre-construction conference. Specific items addressed
shall include: work plan, safety plan, inspection standards, inspector
qualifications and tools, test procedures, environmental control system,
safety plan, and test logs. Notify Contracting Officer at least ten days
prior to meeting.
PART 2
PRODUCTS
2.1
ROOF JOINT SEALANT
Industrial grade, two component, minimum 95 percent solids by volume,
polysulfide type caulking material that has a minimum history of 10 years
acceptable service in water tanks. Sealant shall be compatible with the
epoxy primer and suitable for direct application to prepared steel
surfaces. Sealant shall contain no more than 0.06 percent by weight Lead ,
no more than 0.06 percent by weight Cadmium, and no more than 0.00 percent
by weight Chromium.[ Sealant shall be certified in accordance with NSF 61.]
2.2
COATING SYSTEM
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NOTE: Include bracketed text for new construction
only.
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Alternate systems or products will not be considered. All primer,
intermediate, and topcoat materials shall be manufactured by one
manufacturer. [The entire coating system is intended to be applied in the
field. Alternatively, surface preparation may be accomplished in the shop,
following all temperature, humidity, and testing requirements listed
herein, followed by an application of a hold-primer. Upon completion of
field fabrication, all shop-applied coatings shall be removed, surfaces
prepared to SSPC SP 5, and the specified coating system applied. Adjust
all shop preparation to avoid conflicts with final surface preparation
requirements.]
[2.2.1
NSF Certified Polyamide Epoxy Coating System
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NOTE: Choose the NSF Certified Polyamide Epoxy
coating System where required. Remove Table I when
NSF coating specified.
**************************************************************************
Select a commercially available, three coat polyamide epoxy coating system
that is certified in accordance with NSF 61 for contact with potable water
in water storage tanks of the size being coated. The coating system shall
be suitable for application in three even coats of 50-100 microns 3-5 mils
dry film thickness (DFT), for a total minimum of 225 microns 9 mils DFT.
][2.2.2
MIL-DTL-24441 Epoxy System for Potable Water Tanks
**************************************************************************
NOTE: Choose this system, MIL-DTL-24441 Type III
(/20 and /22), for potable water where certification
to NSF 61 is not required. Edit Table I to match.
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SECTION 09972
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