(a) General.
(1) Pipe and fittings 3-inch to 64-inch shall conform to C150 and C151 and the following requirements:
a. Minimum pipe pressure class shall be based on pipe size, depth of bury and laying conditions in accordance with AWWA C150 and C151.
b. Pipe shall be designed for an operating pressure of 150 psi plus a surge allowance of 100 psi.
c. Interior shall be lined with cement-mortar with seal coat in accordance with AWWA C104.
(b) Ductile-iron pipe for below ground service shall have push-on joints, conforming to AWWA C150 and C151, and to the following requirements.
(1) Provide mechanical joint fittings.
(c) Ductile-iron pipe for above ground service shall have flanged joints, unless noted otherwise on the drawings, conforming to AWWA C115.
(d) Fittings for ductile-iron pipe shall conform to AWWA C110, or C153 and to the following requirements:
(1) Joint type shall be as specified above for the supplied ductile-iron pipe.
(2) In lieu of exterior asphaltic coating and interior cement lining, fittings may be provided with a 6-8 mil nominal thickness fusion bonded epoxy coating inside and out in conformance with AWWA C550.
(3) Fittings shall be made of ductile-iron.
(e) Ductile iron pipe on piers shall have restrained joints as recommended by the pipe manufacturer.
(f) Special pipe joints.
(1) Restrained.
a. Provide restrained joint pipe at fittings and valves on water mains. Length of restrained pipe shall be as calculated by the design engineer and approved by the city. Restrained joints shall be Snap-Lok (Griffin Pipe), Flex Ring and Lok-Ring (American), TR Flex (U.S. Pipe) or approved equal.
b. Restrained joint pipe and fittings shall meet all AWWA standards and other requirements as specified above for standard ductile iron pipe and fittings unless addressed herein.
c. Field made joints are allowable but should be avoided where possible. Careful planning to locate field cuts in standard pipe sections is preferred. For field made joints in restrained piping, use field weldments or an insert equal to TR Flex Gripper Rings or approved equal. Gasket type field made joints will not be allowed.
d. Restrained joint fittings shall be provided by the restrained joint pipe supplier where located within restrained joint pipe sections. Fittings shall be of the same model and type as the pipe supplied from the pipe manufacturer.
e. Restrained joint fittings may be push-on joint type.
f. Megalugs, Series 1100, as manufactured by EBAA Iron Sales or approved equal shall be allowable for restraint where approved by the city.
g. Tees for hydrants do not have to be restrained along the main line except where they are within required restrained length of nearby fittings or valves.
h. Contractor shall develop a field layout schedule and drawing for restrained joint pipe installations.
(Ord. of 11-7-16; No. 10-16)