Abstract: A fastener assembly for securing a first structure to a second structure. The fastener assembly generally includes a bolt, a nut, and a locking washer. The locking washer has a plurality of side walls and corner regions. The locking washer has an eccentric aperture, meaning an aperture that is off-center or not aligned with the center of the locking washer. The locking washer is rotatable between an initial position wherein a first side wall does not engage the second structure, an intermediate position wherein a first corner slidably engages the second structure, and a locked position wherein a second side wall engages the second structure. The side walls have numerous teeth configured to engage the second structure in the locked position. In the locked position, the locking washer exerts both a clamping force and a gripping force to fixedly secure the first structure and the second structure.

Abstract: Prefabricated insulated pipeline section having a one-piece cast cured and dried insulative liner formed of lightweight aggregate in a foamed portland cement paste binder bonded to the inner surface of a tubular outer casing. The liner composition may be cast in place between the liner and the pipe, and wet cured at elevated temperature. Bonding between the pipe and the liner composition is avoided by employing a cement cure retarder on the outer surface of the pipe or by mechanically debonding the pipe from the liner during curing. After curing, the pipe is withdrawn to expose the inner surface of the liner to permit rapid drying at elevated temperature. The prefabricated insulated sections permit simplified pipeline construction at reduced cost as compared with traditional methods of applying half shells of insulation to the pipeline on site.

Abstract: Prefabricated insulated pipeline section having a one-piece cast cured and dried insulative liner formed of lightweight aggregate in a foamed portland cement paste binder bonded to the inner surface of a tubular outer casing. The liner composition may be cast, in place between the liner and the pipe, and wet cured at elevated temperature. Bonding between the pipe and the liner composition is avoided by employing a cement cure retarder on the outer surface of the pipe or by mechanically debonding the pipe from the liner during curing. After curing, the pipe is withdrawn to expose the inner surface of the liner to permit rapid drying at elevated temperature. The prefabricated insulated sections permit simplified pipeline construction at reduced cost as compared with traditional methods of applying half shells of insulation to the pipeline on site.