Definition
Seamless pipe is a long steel bar with a hollow section and no joints around it.
Characteristics
Seamless pipe is directly processed through perforation, hot rolling, cold rolling or cold drawing process, no welded joints, so it has high strength and sealing.
seamless pipe has high tensile strength and yield strength, can withstand greater external force without deformation or rupture, suitable for high pressure, high temperature and other harsh working conditions of pipeline transportation system.
seamless pipe is easy to cut, strong weldability, can be easily processed into the required length and shape, to meet the specific size requirements of different engineering and manufacturing projects.
seamless pipes can be made of a variety of corrosion-resistant materials, such as stainless steel, alloy steel, etc. These materials themselves have good corrosion resistance and can resist the erosion of acids, alkali, salt and other chemical substances.
The production process of seamless pipe adopts advanced rolling and processing technology, which can precisely control the dimensional parameters of the outer diameter, inner diameter and wall thickness of the steel pipe
The inner wall of the seamless pipe is smooth and the roughness is low, which makes the fluid flow in the pipe with less resistance and can achieve more efficient transportation.
Classification
By production method：
can be divided into hot rolled seamless steel pipe, cold rolled seamless steel pipe, cold drawn seamless steel pipe, extrusion seamless steel pipe and so on.
According to section shape:
It can be divided into circular seamless steel pipe and shaped seamless steel pipe, of which the shaped pipe has square, oval, triangle, hexagonal and other complex shapes.
By usage：
It can be divided into general purpose seamless steel pipe and special seamless steel pipe. General purpose seamless steel pipe is used for conveying fluid, structural parts, etc. Special seamless steel pipe is used for boiler, geological exploration, bearing, acid resistance and other special purposes.
