In order to ensure the reading accuracy of orifice flowmeter, the installation of orifice flowmeter should pay attention to the following points: the installation position of orifice should be in the straight pipe section, and there should be no protruding plastic, welding marks and dirt in the pipe with a distance of ten times the pipe diameter in front of the orifice and five times the pipe diameter behind the orifice. The installation direction of the orifice plate should not be mistaken, and the sharp edge of the inlet should correspond to the flow direction of the fluid; The center of the orifice plate must coincide with the center of the pipe. The orifice plates of different fluids cannot be installed incorrectly, because the coefficient K in the flow calculation formula is related to factors such as fluid density.
In June 2016, the fifth air separation plant KDON (AR) 30000/70000-900 of Kaifeng DEAR air separation plant for Hebei Anfeng iron and Steel Co., Ltd. was successfully started up at one time, and qualified oxygen and nitrogen products were successfully debugged. The output and purity of the products reached and exceeded the technical indicators required by the contract. After more than two months of normal operation, in September 2016, the argon system was put into operation and the argon indicators were tested to meet the standards, and the argon output was stable at 950nm ³/ H above, the purity is greater than 99.999%. Win users' praise again.
