Seamless steel pipe is a kind of round, square and rectangular steel with hollow section and no joints around Seamless steel pipe is made of steel ingot or solid tube blank through perforation, and then hot rolled, cold rolled or cold drawn Seamless steel pipe has a central control section and is widely used as a pipeline for conveying fluid. Compared with solid steel such as round steel, the steel pipe has the same bending and torsional strength and is lighter. It is an economic section steel. It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel pipe used in construction
Hydraulic cylinder seamless steel pipe is suitable for oil, hydraulic cylinder, mechanical processing, thick wall pipeline, chemical industry, electric power, boiler industry, high temperature, low temperature and corrosion resistance seamless steel pipe, and it is suitable for petroleum, aviation, smelting, food, water conservancy, electric power, chemical industry, chemical fiber, medical machinery and other industries.
The inner and outer plastic-coated steel pipes are made by melting a layer of polyethylene (PE) resin, ethylene-acrylic acid copolymer (EAA), epoxy (EP) powder, and non-toxic polycarbonate with a thickness of 0.5 to 1.0mm on the inner wall of the steel pipe. The steel-plastic composite pipe composed of organic substances such as propylene (PP) or non-toxic polyvinyl chloride (PVC) not only has the advantages of high strength, easy connection, and resistance to water flow, but also overcomes the corrosion of steel pipes when exposed to water. Pollution, scaling, low strength of plastic pipes, poor fire-fighting performance and other shortcomings, the design life can be up to 50 years. The main disadvantage is that it must not be bent during installation. During thermal processing and electric welding cutting, the cutting surface should be painted with the non-toxic normal temperature curing glue provided by the manufacturer to repair the damaged part.
Alloy seamless steel pipe is a kind of seamless steel pipe, and its performance is much higher than that of ordinary seamless steel pipe.