A proposed ASTM International standard will provide best practices for companies that coat pipe with porcelain enamel (glass) lining. Such lining has been used in municipal wastewater, sewage treatment and other water-related industries since the 1960s. Subcommittee B08.12 on Materials for Porcelain Enamel and Ceramic-Metal Systems is developing the standard.

Porcelain enamel lining acts as a deterrent to interior clogging in piping because of its hardness and improved flow characteristics, says ASTM member Charles Baldwin.

“Porcelain enamel lining applied to the internal surfaces of ductile iron pipe, steel pipe, fittings and valves has been successfully used for more than 50 years,” says Baldwin. Porcelain lined pipes help to minimize maintenance operations and costs, while protecting metal pipe interiors from corrosion.

The proposed standard (WK49160, Practice for Casting Preparation and Test Procedure of Porcelain Enamel Lined Pipe, Fittings and Valves for Use in the Municipal Wastewater, Sewage and Water Treatment Industry) will be used by specifiers, designers, consulting engineers and municipalities. It will serve as a quality control guide in developing project specifications, as well as by manufacturers who make products to meet the specifications.

“Using the proposed standard, once it is approved, will assure that sound, proven manufacturing processes and final quality control procedures are undertaken by all participating manufacturers of the product, ensuring the continued effectiveness and longevity of porcelain enamel lined pipe,” says Baldwin.

To contact the author of this article, email engineering360editors@globalspec.com