Pipe and couplings covered by these requirements are designated as Class 100, Class 150, and Class 200 for maximum working pressures of 100, 150 and 200 pounds per square inch (psi), respectively. Requirements for the installation and use of asbestos-cement pressure pipe and couplings are included in the Standard of the National Fire Protection Association for Outside Protection, NFPA No.24. Published 2/28/1975.
Pipe and couplings covered by these requirements are designated as Class 100, Class 150, and Class 200 for maximum working pressures of 100, 150 and 200 pounds per square inch (psi), respectively. Requirements for the installation and use of asbestos-cement pressure pipe and couplings are included in the Standard of the National Fire Protection Association for Outside Protection, NFPA No.24. Published 2/28/1975.