Aerial installation of beam straight-span pipeline in Guangping River Oil Pipeline Project

Guangping River beam span shared by Lanzhou-Chengdu Crude Oil Pipeline Project and Zhongwei-Guiyang Natural Gas Pipeline Project achieves positioning of crossing pipelines by using a winch for drawing prefabricated pipelines and aerial installation method. Characteristics of the installation technique are introduced and installation operation points are discussed, including accuracy control of hoist base, hoist operation control, span pipe section control, crane selection and safety control of thermal insulation operations. Main working procedures include preparation of installation, scaffolding erection, positioning of pipe supports, setup of the hoist, prefabrication of span pipe sections, aerial installation of span sections, welding of fire bends in compensation sections, fixing of anchor blocks, assembling of pipe pads, and fitting together of thermal insulation layers, pressure testing and drying. This technique can reduce the installation quantity and risk factors in aerial working, avoid repetition of scaffold platform erection, ensure operator safety to the maximum extent and achieve reduction of costs, thus being worth popularization and application.