Basic knowledge of the airport chair steel pipe

by:OUHE     2020-06-20
Basic knowledge of steel pipe steel pipe: the airport chair is a hollow section of strip steel, according to the different cross section shape can be divided into round tubes, square tubes, hexagonal tubes and other various profiled steel pipe, according to the different processing technology and divided into two categories: no 鏠 steel pipe and welded steel pipe. 1. Seamless steel pipe - - - - - - - - - - - - - Hot rolling pipe, cold rolled, cold drawn tubes, extruded tube 2. Welded steel pipe - - - - - - - - - - - - - Hot rolling welded pipe, cold rolled tube welding ( 一) According to the technological points - - - - - - - - - - - - - - - - - - - Arc welding pipe, electric resistance welding ( High frequency and low frequency) Welded pipe and gas welding tube, furnace ( B) According to the weld points - - - - - - - - - - - - - - - - - - - Straight seam welded pipe, spiral welded pipe ( C) According to the classification of wall thickness - - - - - - - - - - - - Thin-walled steel tube ( ≤ 4㎜) , thick wall steel pipe seamless steel pipe: seamless steel tube is a hollow section, there is no seam surrounding strip steel. Steel pipe is hollow section, a large number of used in pipes conveying fluid ( Such as natural gas, coal gas, water and part of the solid material pipe) Compared to solid steel, seamless steel pipe and round steel, the bending torsional strength phase at the same time, the weight is lighter, is a kind of economic cross section steel, widely used in the manufacture of structural and mechanical parts, can improve the utilization rate of materials, simplify the manufacturing process, material saving and processing time. According to the different cross section shape can be divided into round pipe, square tube and special-shaped tube. Welded steel pipe, welded steel pipe and welded pipe, is to use steel plate or steel strip after crimp forming after welding of steel pipe, welded steel pipe production process is simple, high production efficiency, variety specification, funds for equipment is less, but the general strength is lower than the seamless steel tube.
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