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E. Dielectric Isolation <br /> All piping shall be dielectrically isolated from piping or other materials constructed from <br /> dissimilar metals in accordance with Section 13100. <br /> F. Standard Joint Protection (Buried Pipe) _ <br /> Exterior: After steel pipe sections has been laid, clean the exposed metal at the exterior <br /> space at the joint. Wrap the joint with a strip of woven fabric (diaper) and band around <br /> the pipe at each side of the joint. The fabric shall be of such a weave as to allow the <br /> escape of air and excess water but prevent escape of mortar. Pour the joint full of grout <br /> (1 part cement to 1 part fine aggregate with sufficient water to form a consistency of thick <br /> cream) through a space in the woven fabric slightly to one side of the top. Rod the grout <br /> with a beaded wire or chain as it is poured into the joint. Immediately after completing <br /> the exterior joint, place damp earth over and around the joint to prevent rapid drying. <br /> Interior: The inside joints of steel pipe 24 inches and larger shall be cleaned and <br /> thoroughly wetted before being filled with stiff cement mortar and finished off smooth by <br /> troweling or other equivalent method as approved. The inside joints of pipe less than <br /> 24 inches shall be mortared as specified in AWWA C205. Furnish sufficient swabs of the <br /> proper size and shape for use by the installation Contractor to remove excess mortar <br /> from the joints inside pipes with diameters less than 24 inches. These swabs shall be of <br /> rubber and capable of being inflated to the proper size for their intended use. The swabs <br /> shall be equipped with rings, straps, or similar devices which will permit a rope or cable <br /> to be attached to pull the swab through the pipe without deforming the swab to the point <br /> where the inside joint is not wiped clean. <br /> G. Steel Wall Pipe <br /> Fabricate of same material and thickness as connecting pipe, minimum thickness of <br /> 1/4-inch. Lining same as connecting pipe. Provide weep ring for all wall pipes to prevent <br /> water seepage with continuous fillet welded on each side all around. All penetrations <br /> through reinforced concrete walls shall be constructed to prevent metal to metal contact <br /> between the pipe and reinforcing steel in the wall. <br /> H. Pipe At Ground Level <br /> Buried pipe material, coating, and lining shall extend to 6" above grade and shall <br /> terminate with a flange connection equipped with an insulating kit. Exposed piping shall <br /> be all pipe more than 6" above grade. <br /> 2.05 PIPE TYPE C — POLYVINYL CHLORIDE PRESSURE PIPE AND FITTINGS (PVC) _. <br /> A. Pipe <br /> PVC pipe shall be Schedule 80 unless otherwise shown, Class 12454-B, rigid, <br /> unplasticized pipe made from polyvinyl chloride in accordance with ASTM D1784 and <br /> D1785. Joints shall be solvent weld, except that threaded or flanged joints are to be <br /> used where required at specific locations. <br /> Division III-153 NEI Phase II Water and Sewer — <br /> July 2007 CIP Nos.7468, 7589, 7590 <br />