Carbon steel pipe is the most commonly and widely used in the gas project field.
Its main advantages are: high strength, good toughness, bearing stress, impact resistance and rigor, good plasticity, ease of welding and thermal processing, thin wall thickness, to save metal. But its poor corrosion resistance, need to have proper anti-corrosion measures. Steel pipe used in gas engineering are generally made of high quality low carbon steel (Q235) or low-alloy steel (16Mn).
Steel construction is the construction of a new type of energy saving and environmental protection system, known as the 21st century "green building". The steel construction is light weight, high strength, good seismic performance, energy saving, recycling, building structure, in line with the requirements of the development of energy efficient building and sustained and healthy economic development. The biggest advantage of the steel structure is to bring people to the building function, sensory requirements and economic requirements of a perfect combination. Steel tube structure, with its superior performance in recent years, application of the rapid development of the range of applications involving almost all structural areas, including housing construction, bridges, dams, offshore platform structure and tower masts and so on.
Steel with hollow sections is conveying fluid, such as the transportation of oil, gas, gas, water and some solid materials, pipes, etc.. Compared with the round steel and other solid steel in the flexural torsional strength, light weight, is an economic cross-section steel, widely used in the manufacture of structural parts and mechanical parts, such as drill pipe, automotive transmission, bicycle rack and construction using steel scaffolding. Steel pipe manufacturing annular parts, can improve material utilization, and simplify the manufacturing process, saving material and machining time, such as rolling sleeve ring, jack sets, has been widely manufactured steel pipe.
Large-diameter steel pipe with good adhesion, corrosion resistance, can be resistant to acid, alkali and other chemical corrosion, non-toxic, does not rust, wear resistance, impact resistance, strong permeability, smooth pipe surface will not adhere to any substance, can reduce the transmission of resistance, large diameter steel pipe improve flow and transmission efficiency and reduce the delivery pressure losses. Solvent-free coating, no oozing substance, and thus will not the transmission medium of pollution in order to ensure the purity and health of the fluid at -40 ℃ to +80 ℃ range of thermal cycles used interchangeably, not aging. no cracks, and thus can be used in the cold zone and other harsh environment. Large-diameter steel pipe is pipe that outside diameter is above 1000MM, large diameter coated steel pipe is coated with plastic on the basis of large diameter spiral welded pipe and high-frequency welded pipe from the solvent-free coating, small-diameter steel pipe no oozing substance and therefore not pollution transport media, thus ensuring the purity and health of the fluid, -40 ℃ to +80 ℃ range of thermal cycles used interchangeably, no aging, no cracks, and thus in the cold zone and other harsh environments to use.
The large diameter coated steel pipes are widely used in tap water, natural gas, petroleum, chemical, pharmaceutical, telecommunications, electricity, large diameter steel marine engineering field generally less than the outer diameter of the tubes 89 are collectively referred to as small-diameter steel pipe.