This standard describes the requirements for the materials and application of a
cement-mortar lining to the inside surface of 4-in. (100-mm) and larger new and old
steel, ductile-iron, and cast-iron water pipelines that have been previously installed, as
well as related work. The application requirements are (1) that the lining of straight
pipe sections and long radius bends shall be performed by a machine that progresses
uniformly through the pipe, applies cement mortar against the pipe surfaces, and is
provided with an attachment for mechanically troweling the mortar to obtain a
smooth lining of uniform thickness with smooth transitions over joints; and (2) that
the lining of bends, specials, and areas adjacent to valves shall be machine sprayed
and hand troweled or, where machine placement is impractical, shall be performed
manually.