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Section 15060 <br /> PIPING SYSTEMS <br /> 2.03 DIELECTRIC ISOLATION <br /> A. General <br /> All buried metallic piping shall be dielectrically isolated from all other metal piping, <br /> hangers,brackets, steel reinforcing and all other metal structures. All piping shall be <br /> dielectrically isolated from piping or other materials constructed from dissimilar metals. <br /> B. Flange Insulators <br /> Flange dielectric insulation sets shall contain full faced gaskets, full length sleeves, and <br /> double insulating washers or as specifically indicated on the plans. Insulation material for <br /> the flange insulation sets shall be phenolic resin and flange faced gaskets shall be neoprene <br /> faced phenolic resin. All insulating materials shall be of a type designated by the <br /> manufacturer as suitable for use at the operating and test pressures specified in piping <br /> system specification sheets at the end of this section. <br /> C. Wall Penetrations <br /> All penetrations through reinforced concrete walls shall be constructed to prevent metal to <br /> metal contact between the pipe and reinforcing steel in the wall. Details shall be as shown <br /> on the plans. <br /> D. Insulating Unions <br /> Insulating unions shall meet Fed. Spec. WW-U-532, Class 1 requirements for dimensional, <br /> strength, and pressure requirements. insulation barrier shall limit galvanic current to i% of <br /> the short circuit current in a corresponding metallic joint. The insulating material shall be <br /> impervious to water. Each connector shall match the type of material to which it connects. <br /> E. Pipe Supports <br /> Any pipe hangers, supports, brackets and saddles installed on the buried side of dielectric <br /> insulators on the protected pipe shall be dielectrically isolated from the pipe by insertion of <br /> dielectric insulating material between the hanger and the pipe. <br /> PART 3 -EXECUTION <br /> 3.01 INSTALLATION <br /> A. Location <br /> Walnut Grove Sewer Project(Conformed) 15060-4 SA0160401 <br /> March 2008 nAsa0160401\specs\w9 conform\div 15\15060.doc <br />