Abstract: A polyvinyl chloride ("PVC") elbow connector for joining rail and post members of PVC gate structures, a customizable PVC gate structure incorporating said elbow connector, and a method of constructing PVC gate structures. The elbow connector comprises a molded body shaped to correspond to the gate post and rail members with legs projecting at a ninety degree angle and flanges extending from the inside wall of the end of each leg. The flanged elbow connectors permanently mate with the PVC post and rail members to provide a strong, durable and seamless connection, and facilitate the fabrication of customized gate structures in the field without the cost and delays associated with special order factory gates. According to one embodiment, the gate structure includes metal U-channel inserts positioned snugly within each rail member for added strength and support. The flanged elbow connectors are of one-piece molded construction and gate components are fabricated from virgin PVC impregnated with UV ray inhibitors.

Abstract: An offshore system for laying a continuous length of pipe on the sea bottom from a pipe-carrying reel adapted to be mounted on a carrier vessel having an improved pipe handling and conditioning apparatus for working on the unspooled pipe. The improved apparatus includes a pipe straightener for imparting a reverse plastic bending moment to the unspooled pipe passing therethrough, and which comprises at least two pairs of pipe support rollers, each pair being aligned along the pipe path and mounted for rotational movement about respective rotational axes normal to the pipe path and parallel to the plane of the deck of the carrier vessel, and for pivoting movement about a pivot axis located between and substantially parallel to the respective rotational axes.