(1) OUTSIDE CASING: Heavy wall fiberglass pipe to protect the insulation from ground water and earth loads. (2) INSULATION: Primary insulation is high temperature calcium silicate rated a 1200ºF. Secondary insulation is polyurethane foam to provide highly efficient insulation and support for the carrier pipe along the entire length. Insulation in the coupling is refractory cement. (3) CARRIER PIPE: Carbon steel with metalized ends to convey saturated steam. (4) PUSH JOINT COUPLING: Casing: Heavy wall FRP pipe to stabilize coupling during expansion and to protect the lock block and coupling area from earth loads. Lock Block: Reinforced refractory composite to lock bronze coupling into casing and provide insulation to the coupling. Bronze Coupling: Machined bronze casting to join two sections of carrier pipe with sealing rings contained in grooves. (5) SEALS: End Seal: High temperature elastomer at each end of the pipe lengths to protect insulation from ground water infiltration. Primary Seals: Teflon V-Ring supported by stainless steel to provide seal between carrier pipe and bronze coupling. Secondary Seal: High temperature elastomer o-ring on the bronze coupling to align pipe and provide backup pressure seal. External Seal: 30 mil High Temperature Tape applied circumferentially around the pipe and coupling casing joint as an additional seal where ground water is severe. Tape not shown. NOMINAL PIPE SIZE (IN.) CARRIER O.D. (IN.) CASING O.D. (IN.) THICKNESS WEIGHT (LBS./20 FT.) CALCIUM SILICATE (IN.) FOAM (IN.) CASING (IN.) 3 3.50 8.38 1.00 1.25 0.185 268 4 4.50 9.38 1.00 1.25 0.185 358 6 6.63 12.50 1.50 1.19 0.250 638 8 8.63 16.50 2.00 1.69 0.250 930 10 10.75 18.50 2.50 1.13 0.250 1286 12 12.75 20.50 2.50 1.13 0.250 1554 NOTE: All dimensions are in inches unless otherwise noted. Standard lengths are 20'-0", special lengths are available. Weights are approximate. SUPER TEMP-TITE®