1 02/18 DUC-TITE PIPING SYSTEMS SPECIFICATIONS DUC-TITE shall be used where specified for chilled water or low temperature hot water service using a rubber ring joining method. Unless otherwise specified, all pipe, fittings, valves and accessories shall conform to the requirements of ANSI B31.1 and shall be of the proper type for pressure and temperature of the cooling or heating water. DUCTILE IRON CARRIER PIPE: Carrier pipe shall be Ductile Iron Pipe conforming to ANSI A21.51, and AWWA C151. Pipe shall be class 51 in sizes 3" and 4" and class 50 in sizes 6" - 18". RUBBER SEALING RINGS: Rubber sealing rings for DUC-TITE Piping shall be as specified under AWWA C104. CASING PIPE: The casing shall be [Polyvinyl Chloride (PVC)] pipe shall be of virgin PVC resin meeting the minimum classification requirements of ASTM D1784 or [High Density Polyethylene (HDPE)]. The casing and insulation system shall be suitable for H-20 wheel loading at three feet of cover. A two-foot burial depth may be acceptable when bedding and backfill materials meet highway requirements for stability and compaction. The casing thickness shall be as shown on page four. END SEALS: End seals for insulated DUC-TITE shall be compressed rubber. POLYURETHANE FOAM INSULATION: The insulation shall be Polyurethane Foam conforming and shall meet the following specifications: Type: Two component urethane Compressive Strength: 40 psi parallel min at 5% comp Shrinkage: None at 70ºF Free Rise Density: 2.0 to 3.0 lbs/cubic foot Aged "K" (70ºF - 72 hrs) 0.160 BTU•inch/hour•ºF•ft2 Closed Cell Content: 90% Insulation concentricity: Carrier Pipe shall be concentric to casing pipe. The allowable maximum deviation from centerline of carrier pipe shall be +\- 1\4 inch at the casing center point and +\- 1\16 inch at the end seals. CASING-TITE SEAL: The Casing-Tite seal shall be a 30 mil high temperature tape. The Casing-Tite seal is required on low temperature hot water service and optional on chilled water service.