|Plastic Piping Systems Committee Approves Standard for Sewer Line Rehabilitation
Keeping pipes properly connected is clearly an important aspect of any sewer maintenance system. A new ASTM International standard, F 2561, Practice for Rehabilitation of a Sewer Service Lateral and Its Connection to the Main Using a One-Piece Main and Lateral Cured-in-Place Liner, has been developed that makes the process of keeping sewer pipelines connected more effective. Practice F 2561 is under the jurisdiction of Subcommittee F17.67 on Trenchless Plastic Pipeline Technology, which is part of ASTM International Committee F17 on Plastic Piping Systems.
Practice F 2561 covers requirements and test methods for the reconstruction of a sewer service lateral pipe and its connection to the main pipe without excavation. This is done using a resin-impregnated one-piece main and lateral cured-in-place lining that is installed into the piping by means of air or water inflation and inversion. This installation, when cured, is a continuous, one piece, tight fitting, corrosion-resistant lining that extends over a predetermined length of the lateral pipe and the adjacent section of the main pipe.
“The typical application of the standard will be to renew a lateral pipe and provide a verifiable non-leaking connection to the main pipe by simultaneously renewing a short section of the main at the full circumference,” says Larry Kiest, CEO and president, LMK Enterprises, Inc. “It is a practical application, as the entire renewal process is accomplished with no excavation of any kind.”
Kiest notes that F 2561 is based on engineering practices in which the user can design a liner for external and hydrostatic loading by calculating the depth of the pipe, the water table and the flexural modulus versus the thickness of the cured-in-place pipe. “This standard eliminates the guessing and wishful thinking and puts proven materials and installation methods in the hands of the user,” says Kiest.
While some homeowners may need to maintain a lateral sewer pipe (or a portion of one), Kiest says municipal agencies or owners of collection systems are most likely to maintain lateral pipes in the right of way, and would benefit most from the use of F 2561. //
Technical Information: Larry Kiest, Jr., LMK Enterprises, Inc., Ottawa, Ill.
ASTM Staff: Robert Morgan
Upcoming Meeting: Nov. 13-16, November Committee Week, Atlanta, Ga.