◪ 1.The steel pipes used are all hot-pressed seamless steel pipes, all of which are made of Q235 and conform to GB700-88.
◪2.The pipe-to-pipe cross-links and pipe-to-connector connections may use butt welds or full-period fillet welds.
◪ 3.All butt welds must be cut-through welds. These welds are not specifically graded as Class 3.
◪ 4.The unwelded weld is a fillet weld with a weld not less than 4mm. All exposed openings have a sealing plate and a thickness of 4mm.
◪ 5.The bolts are not shown in the figure as galvanized ordinary large hex head bolts, in line with GB5780-86; nut in line with GB41-86.
◪ 6.Manual welding using E43xx welding rod, welding wire and flux used in automatic welding and semi-automatic welding shall ensure that the tensile strength of the deposited metal is not lower than that of the corresponding manual welding electrode.
◪ 7.The film cloth is made of white PVDF film material.
◪ 8.The material of the steel wire rope conforms to the universal wire rope standard "GB/T8918-1996". If this project is adopted, it is a hemp wire rope with a nominal tensile strength of 1570 and the surface is galvanized.
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