The steel wire mesh skeleton composite pipe is made of carbon steel and is expressed by multiplying the big end diameter by the small end diameter. Steel mesh skeleton composite pipe standard: national standard, American standard, British standard and various non-standard high-pressure stamping.
The reducing forming process of the steel wire mesh skeleton composite pipe is to put the tube blank with the same diameter as the big end of the reducing pipe into the forming die. By limiting the axial direction of the tube blank, the metal moves along the die cavity and shrinks to form. According to the size of reducing pipe, it can be divided into one-time limited forming or multiple limited forming.
The steel mesh skeleton composite pipe is characterized by significantly higher strength than carbon steel with the same carbon content, good toughness and plasticity, good weldability and corrosion resistance.
Because one side of the steel mesh skeleton composite pipe is flat, it is convenient for exhaust or liquid drainage, and it is convenient for start-up and maintenance. Therefore, the liquid pipe of the horizontal device is generally steel mesh skeleton composite pipe. The roundness of reducer shall not be greater than 1% of the outer diameter of the corresponding end, and the allowable error shall be ± 3mm; If the selected diameter specification of the reducer is not consistent with the inner diameter of the process pipe, the reducer shall be reduced or expanded accordingly. If the pipe is reduced, whether the pressure loss caused by this will affect the process flow shall be considered.
In order to prevent the influence of the reducer on the dispersion of the flow field and the formation of pressure loss, thereby reducing the measurement accuracy of the electromagnetic flowmeter, the required center cone angle α Not more than 15 °, the smaller the better. There are two types: concentric and high-pressure. Concentric reducers are generally used on vertical pipes; The steel mesh skeleton composite pipe is used for horizontal pipe, and it shall be noted that the top is flat or the bottom is flat.
