Specifications include, but are not limited to: SPECIFICATIONS FOR 4-INCH TO 16-INCH UNRESTRAINED PUSH-ON DUCTILE IRON PIPES: PIPE PROPERTIES All ductile iron pipe shall be manufactured in accordance with and meet all requirements of ANSI/AWWA C151/A21.51. Ductile iron shall have 60,000 psi minimum tensile strength, 42,000 psi minimum yield strength, 10% elongation and minimum 7 ft/lb Charpy test value. Pipe barrels shall maintain the dimensional tolerances as specified for full-length pipe spigots in Table 1 of ANSI/AWWA C151/A21.51. All pipe barrels shall be 100% gauged for the entire pipe length so that pipe diameter and roundness shall not impede assembly into adjoining pipe, fitting or valve bell regardless of what section of the barrel is used. Gauged pipe shall be identified with a ½” green stripe painted around the circumference of the pipe near the spigot end.