SECTION 09973 INTERIOR COATING OF WELDED STEEL PETROLEUM FUEL TANKS (cont.)

Fuel Tank Specification, Section 09970 INTERIOR

COATING OF WELDED STEEL PETROLEUM FUEL TANKS, except

the Air Force uses an epoxy topcoat.

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NOTE: The metric standard for measuring coating

thickness is microns (25.4 microns=1 mil - use

nominal 25 microns=1 mil).

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NOTE: The designer should not alter the products and

processes specified herein without careful

evaluation.

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NOTE: This specification is for a 3 Coat, thin film

system, which is compliant with EPA VOC regulations

as of June 2000.

- Epoxy Coats 350 g/l 2.8#/gal max. VOC

The designer shall review state and local,

regulations and determine whether the coating in

this Section complies with restrictions on volatile

organic components (VOC) and other chemical

constituents.

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NOTE: Previous versions of this specification have

included a requirement for surfaces to be abrasive

blasted to SSPC SP 7, inspected, and repaired, prior

to coating. That requirement has been removed from

this specification, and if required for a repair

project, it should be included in the structural

repair Section of the project specification. Tailor

the paragraph to the needs of cleaning that will be

required in preparation for repairs, and note that

the abrasive blasting for inspection should be

accomplished in such a manner that it does not

conflict with any surface condition requirements in

this Section, such as creating excessive surface

profile that may require excessive primer thickness.

For repair projects, specify appropriate portions

of the steel surfacing requirements (according to

NACE RPO178) from Section 13205 STEEL TANKS WITH

FIXED ROOFS.

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NOTE: Designs for fuel tank linings should be based

on recent inspections. Wherever possible, a coating

inspection, or coating condition survey (CCS), as

described in Section 09971 EXTERIOR COATING OF STEEL

STRUCTURES, should be accomplished prior to

designing a coating project for fuel tank interiors.

SECTION 09973

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