1 02/18 WELD-TITE PIPING SYSTEMS SPECIFICATIONS WELD-TITE shall be used where specified for condensate, low temperature hot water, or chilled water service, using a welded 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 heating or cooling system. STEEL CARRIER PIPE: Carrier pipe shall be black steel per ASTM A-53, Grade B [welded][seamless] or ASTM A-106 [seamless], schedule [40] (standard weight for 12” - 24”) or schedule [80] (extra heavy weight for 10” - 24”). 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 thickness for PVC casing shall be as shown on page three. Consult manufacturer for HDPE dimensional data. RUBBER END SEALS: Rubber end seals for insulated WELD-TITE shall be a high temperature (HT) heat resistant Ethylene Propylene Diene Monomer (EPDM) molded rubber compound. All surfaces shall be smooth and free of voids. POLYURETHANE FOAM INSULATION: The insulation shall be Polyurethane Foam 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 the centerline of the carrier pipe shall be plus or minus 1/4 inch at the casing center point and plus or minus 1/16 inch at the end seals. CASING-TITE SLEEVE: The Casing-Tite sleeve shall be of virgin PVC Resin meeting classification requirements of ASTM D1784. CASING-TITE SEAL: The Casing-Tite seal shall be a 30-mil high temperature tape. INSULATED FITTINGS: Fittings may be pre-insulated by Thermal Pipe Systems, Inc. using the same insulation thickness and casing as the pipe. Where necessary, laid-up fiberglass casing will be substituted on all or part of the fitting. End seals on fittings shall be the same as used on the pipe. If specified, fittings may also be field insulated using formed urethane sections and high temperature tape.