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Updated On: October 22, 2013
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.
Provides safe, factory-floor-like working conditions. Can be engineered to fit almost any shape, structure or size. Modular platform easily assembled from just a few basic components. Excellent containment. Applications include vessels, offshore rigs and bridges.