The ERW steel pipe & tube rolling mill is a series of pipe machines, which use a certain width of steel strip to manufacture longitudinal welded pipes.
The erw steel pipe production line is to form various metal pipe raw materials (plain carbon steel, aluminum, stainless steel, non-ferrous metals, etc.) through extrusion deformation and other means (round pipe, square pipe, special-shaped pipe, etc.), using resistance welding technology for welding, sizing the welded pipe through squeeze rollers (making various pipe diameters), and cutting the pipe to length (according to the required length) through a computer flying saw to obtain a complete set of metal pipe products Production equipment.
First, the uncoiled steel coil is unwound and flattened into a steel strip. The flattened steel strip will be inserted into the forming machine, and the rollers in the machine will bend the steel strip into a circular tube shape, and then send the circular tube into welding Box, where high-frequency or solid-state welding machine is used for welding. The pipe is formed into the desired shape (round/square/rectangular, etc.) or size in the setting machine. Finally, cut the pipe to a certain length and tie it up.
The complete erw steel pipe production line mainly includes: decoiler-strip leveling-shearing butt welding machine-material cage / storage looper-forming machine-welding machine-burr removal-sizing machine-flaw detection-flying saw cutting -Initial inspection-steel pipe straightening-pipe section processing-hydraulic test-flaw detection and so on.
The related equipment of the erw steel pipe production line is mainly CNC cabinets, including: high-frequency main cabinet, high-frequency inverter cabinet, speed control cabinet (also commonly known as "drag"), computer flying saw CNC machine (also called "computer flying saw Console") etc.
Tips: In case ASTM A53 Grade B in ERW (electric resistance welded) pipe, the weld seam shall be done the heat treatment with a minimum 1000°F [540°C]. In this way the no untempered martensite remains.
In case ASTM A53 B erw pipe in cold expanded, then expansion should not exceed 1.5% of the required OD.