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ITEM: 43203 This standard provides minimum requirements for coal-tar
protective exterior coatings and interior linings used in the potable
water supply industry for buried steel water pipelines. Sections
4.3 through 4.5 and Sec. 4.8 cover the requirements for hot-applied,
coal-tar enamel and its exterior and interior application to pipe,
special sections, connections, fittings, and field procedures. Section
4.6 covers the requirements for hot-applied, coal-tar base tapes
for application to special sections, connections, and fittings.
Section 4.7presents alternative coal-tar coating systems, wraps,
and procedures for external coating systems that provide additional
coating protection for use in severe trench locations. All AWWA
steel pipe coating standards are written for and based on the service
temperature of potable water. For operating temperatures higher
than the normal temperature of potable water, consult the manufacturer
for recommendations concerning temperature limitations for coal-tar
protective coatings and linings. Topics covered include: storage
conditions; government regulations; and, safety and environmental
considerations. The purpose of this standard is to provide the minimum
requirements for coal-tar protective coatings and linings for steel
water pipelines - enamel and tape - hot applied, including materials,
application, verification, and delivery. |