All vitrified clay pipe and fittings shall be of one class designated "extra strength,"
of the best quality, vitrified, homogenous in structure, thoroughly burned throughout
their entire thickness, impervious to moisture, sound, and free from cracks, checks,
blisters, broken extremities or other imperfections, and must give a metallic ring
when struck with a hammer. Pipe shall be bell-and-spigot pipe unless otherwise approved.
Pipe ends shall be square with the longitudinal axis, and sockets shall be true, circular
and concentric with the barrel of the pipe. The thickness of the shell, the depth
of the socket and the dimension of the annular space shall be within the limits of
permissible variation to dimension standards of the specifications of the Clay Pipe
Institute, 2600 Wilshire Boulevard, Los Angeles, California 90057, and to the applicable
provisions of ASTM designation C-200, for the size of pipe indicated on the plans.
All pipe and special fittings shall comply with the applicable provisions of the vitrified
clay pipe specifications of the Clay Pipe Institute in respect to the hydrostatic
pressure test, size, shape and three-edge bearing load test and all other requirements
of such specifications.
(Ord. No. 90-11, § 10, 3-6-90)
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