A connection method for large-diameter pipeline installation

Abstract

This technology relates to the construction field of pipeline installation engineering, and specifically relates to a connection method for large-diameter pipeline installation. According to the characteristics of small axial force of the pipeline in large-diameter pipeline engineering, the circumferential seam full welding of metal steel pipe joints is optimized as a composite joint. , that is to take rib plate reinforcement at the joint or weld the local circular seam to offset the influence of the pipeline axis tension, and then use epoxy and glass cloth or carbon fiber cloth to form a "glass fiber reinforced plastic" flexible joint on the outer wall of the joint, which can not only assist the pipeline The axial force is mainly used for anti-seepage of the pipeline, and meets the requirements of the temperature expansion and deformation of the pipeline line; the inner wall of the joint is filled and smoothed with epoxy asphalt filler without damaging the protection of the pipeline coating. , so as to complete the stress-free butt joint of the joint and form a composite joint connection. The joint connection formed by the above method can also enhance the ability to resist temperature expansion and deformation in the axial direction.

Description

technical field [0001] The technology relates to the construction field of pipeline installation engineering, in particular to a connection method for large-diameter pipeline installation. Background technique [0002] Under normal circumstances, pipe installation welding has a wide range of applications and can be used for the connection of various diameters of metal pipes; other connection methods are selected according to the size of the pipe diameter and the requirements for disassembly, among which screw connection, adhesive connection, thin-walled stainless steel Pipe connections, copper pipe connections, hot melt connections, ferrule connections are mostly used for small diameter pipes and special pipe connections; welded connections and socket connections are mostly used for large diameter pipe connections; flange connections and groove connections are more suitable for small and medium-sized pipes. Diameter pipe connection, but also easy to install and remove. [0...

AI Technical Summary

Problems solved by technology

For the connection of steel pipe joints with larger diameters, because the circular weld seam to be welded is long, not only the construction cost of the weld seam is high, but the flaw detection is difficult to detect, and the simultaneous operation of adjacent weld seams interferes with the arc flash and hurts the eyes of the operator, which affects the construction. progress, and the welders must obtain the corresponding qualifications, and the construction skills are high; when PCCP and other material pipes are used for socket connection, the ellipticity of the pipe forming is required to be high, otherwise it will be necessary to adjust the pipe several times for butt joint trial, and it is easy to cause The rubber water stop ring is damaged, making it difficult to install

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