Design and Construction Standards - Tualatin Valley Water District

Water Mains Section 3iii.iv.American Cast Iron Pipe CompanyGriffin Pipev. American Pipevi.District-approved equal4. Ductile iron pipe must be cement-mortar lined.5. A non toxic vegetable soap lubricant shall be supplied from the pipe manufacturerin sufficient quantities for installing the pipe.d. Ductile Iron Fittings1. Ductile iron fittings shall conform to ANSI/AWWA C110/A21.10 and/or ANSI/AWWAC153/A 21.53. Fittings shall have the following information cast upon them:i. Manufacturer’s identificationii. Country of manufactureiii. Pressure ratingiv. Number of degrees or fractions of a circle (bends)v. The District may require additional metallurgical documentation or othercertifications.2. Fitting joints shall have mechanical joint (MJ) ends, except where specifically shownor detailed otherwise.3. The pressure rating for all fittings shall be equal to or greater than the pressurerating of adjacent pipe.4. Liningi. Fittings shall have a fusion-bonded epoxy lining of six to eight mil nominalminimum thickness. Lining shall conform to the requirements ofANSI/AWWA C550 and C116/A21.16.ii. Alternatively, the fittings may be cement mortar lined to the same thicknessspecified for the pipe.e. Mechanical Joint Fittings and Restraints1. Mechanical joint fittings shall be ductile iron short pattern.2. Fittings shall conform to ANSI/AWWA C110/A21.10 and shall be of a class at leastequal to that of the adjacent pipe.3. Bolts shall be domestic Cor-Ten or ductile iron tee-head bolts.4. Mechanical Joint Restraints.i. “Megalug style followers,” which utilize individually activated wedges thatincrease resistance to pullout as pressure or external force is increased,shall be provided as joint restraint.TVWD Water System Standards June 2012 Page 3-4