Carbon steel tube is an economic steel, the product of steel and its variety of specifications are extremely wide, and its performance requirements are also varied. Carbon pipes can be used to transport fluids and powdery solids, exchange heat energy, and manufacture machinery parts and containers. The use of steel pipes to manufacture building structure grids, pillars, and mechanical supports can reduce weight, save 20 to 40% of metal, and realize factory-mechanized construction. The manufacture of highway Bridges with steel pipes can not only save steel, and simplify construction, but also greatly reduce the area of protective coating, saving investment and maintenance costs. The components of high-quality erw steel pipe are generally standard parts, so the design of the components of the pressure pipe is mainly the selection of its standard parts, carbon pipe pressure rating is also the determination of its standard parts level.
First of all, the nominal pressure expressed by the standard pipe fittings is the nominal pressure level also called mapress carbon steel tube pressure level; the wall thickness level expressed by the standard pipe fittings is the wall thickness level; we usually carbon seamless steel pipe by the standard pipe fittings in the nominal pressure level and the wall thickness level jointly determined by the pipe pressure characteristics called pipe pressure level parameter. The parameter that can reflect the pressure-bearing characteristics of the pipe is called the pressure rating of the pipe. The determination of pressure level is the basis of tube carbon steel design, but also the core of the design. It is the pressure pipeline layout, and pressure pipeline stress calibration design prerequisites, but also affects the pressure pipeline infrastructure investment and pipeline reliability of important factors.
In engineering, process operating parameters should not be directly as carbon steel tube material design conditions, because it is necessary to consider the fluctuation of process operations, the impact of connected equipment, environmental impact, and other factors, and based on process operating parameters to give a certain amount of safety as a design condition. The design conditions mentioned here mainly refer to the design pressure and design temperature. high carbon steel tube pressure should not be lower than the normal operation, by the internal or external pressure and temperature constitute seamless carbon steel pipe for sale components of the maximum wall thickness or the highest nominal pressure rating conditions. Considering the medium of static liquid column pressure and other factors, we design the pressure should generally be slightly higher than external pressure and temperature constitutes the most demanding conditions of the maximum working pressure.
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