Hot-rolled seamless steel pipes are made of a single piece of metal with no seams on the surface, called seamless steel pipes.
According to the production method, seamless pipes are divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes,extruded pipes and pipe jacking. Seamless steel pipes are divided into two types: round and special-shaped according to the cross-sectional shape. The maximum diameter is 650mm and the minimum diameter is 0.3mm. Depending on the application, there are thick-walled and thin-walled tubes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, petrochemical cracking pipes, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors and aviation. A steel pipe without seams along the perimeter of its cross-section. The materials are ordinary and high-quality carbon structural steel (Q215-A~Q275-A and 10~50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc.
The use, it is divided into two categories: general use (for water, gas pipelines and structural parts, mechanical parts) and special (for boilers, geological exploration, bearings, acid resistance, etc.). The outer diameter of the hot-rolled seamless pipe is generally greater than 32mm, and the wall thickness is 2.5-200mm. The outer diameter of the cold-rolled seamless pipe can reach 6mm, the wall thickness can reach 0.25mm, and the thin-walled pipe can reach 5mm. Rolling has higher dimensional accuracy than hot rolling Material: Carbon seamless steel pipe and alloy seamless steel pipe. Main use: conveying water, gas, oil, etc. Structural seamless tube included. Conveying fluid seamless pipes and boilers Tube. Services: Black painting, oiling, cutting to specified length, sealing