Stainless steel thick-walled steel pipes refer to stainless steel pipes with a wall thickness of 10-50.0mm. Those with a wall thickness of 50mm or more are called extra-thick-walled stainless steel pipes. The manufacturing process of stainless steel thick-walled steel pipes is to use steel ingots or solid tube blanks to perforate them into capillary tubes, and then hot-roll, cold-roll, or cold-draw them. The specifications of stainless steel pipes are expressed in terms of outer diameter * wall thickness in millimeters.
Hot-rolled stainless steel seamless pipes are generally produced on automatic pipe rolling units. The solid tube blank is inspected and surface defects are removed, cut into the required length, centered on the perforated end of the tube blank, and then sent to the heating furnace for heating and piercing on the punching machine. It continues to rotate and advance during piercing holes. Under the influence of the rollers and the end, the tube blank is hollow gradually, which is called a gross pipe. Then it is sent to the automatic pipe-rolling machine to continue rolling. *The wall thickness is evened by the leveling machine, and the diameter is determined by the sizing machine to meet the specification requirements. The use of continuous pipe rolling units to produce hot-rolled thick-walled stainless steel pipes is a more advanced method.
Thick-walled stainless steel pipe production process flow:
Hot rolling (extruded seamless steel pipe): round tube blank → heating → perforation → three-roll cross rolling, continuous rolling or extrusion → disturbing → sizing (or diameter reduction) → cooling → straightening → hydraulic test (or Flaw detection)→marking→warehousing
Post time: Jan-22-2024