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Southern Human Services Center Smith Sinnett /2020072 <br />HVAC and Roof Renovations Orange County,North Carolina <br />Hydronic Piping 23 21 13 - 7 <br />M.Make connections to equipment installed by others where said equipment requires piping services <br />indicated in this section. <br />N.Install firestopping to preserve fire resistance rating of partitions and other elements,using <br />materials and methods specified. <br />O.Slope piping and arrange to drain at low points. <br />P.Install piping to allow for expansion and contraction without stressing pipe,joints,or connected <br />equipment. Refer to Section 23 05 16. <br />Q.Welded Joints: <br />1.Use weld material diameter as procedurally required for type and thickness of work being <br />done. <br />2.Use sufficient argon pre-puge and argon post-purge for GTAW processes. <br />3.Clean tacks before welding out.Remove slag after each pass by grinding to avoid slag <br />inclusion. <br />4.Weld reinforcement shall not exceed limits established in ASME B31.1 <br />5.Brush each weld free of rust and paint with rust resistant product that matches surface color. <br />R.Grooved Joints: <br />1.Install in accordance with the manufacturer's latest published installation instructions. <br />2.Gaskets to be suitable for the intended service,molded,and produced by the coupling <br />manufacturer. <br />3.Pump drops shall be installed as a single manufactured assembly and should not be <br />disassembled for any reason.Roll grooved ends of spool piece cut to length to connect drops <br />to Victaulic Style 26,Vic-Header. <br />4.All installed grooved product installations shall be visually verified by confirming pad to pad <br />contact with positive or neutral offset. <br />5.A factory trained representative shall provide on-site training for contractor's field personnel in <br />the use of grooving tools and installation of grooved end products.The representative shall <br />periodically visit the jobsite and verify contractor is following best recommended practices in <br />grooved product installation. <br />S.Pipe Hangers and Supports: <br />1.Install in accordance with ASME B31.9,ASTM F708,or MSS SP-58. <br />2.Support horizontal piping as scheduled. <br />3.Place hangers within 12 inches of each horizontal elbow. <br />4.Use hangers with 1-1/2 inches minimum vertical adjustment. Design hangers for pipe <br />movement without disengagement of supported pipe. <br />5.Where several pipes can be installed in parallel and at same elevation,provide multiple or <br />trapeze hangers. <br />6.Provide copper plated hangers and supports for copper piping. <br />7.Cut hanger rods to within 1"of nut. <br />T.Provide clearance in hangers and from structure and other equipment for installation of insulation <br />and access to valves and fittings. Refer to Section 23 07 19. <br />U.Provide access where valves and fittings are not exposed. Coordinate size and location of access <br />doors with Section 08 3100. <br />V.Install valves with stems upright or horizontal,not inverted. <br />W.All trapeze hanger rods shall be cut to within 1"of the bottom nut. <br />END OF SECTION <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6