A New Portable Instrument for Orifice Geometric Parameters Measurement

摘要

According to statistics, about 90% natural gas flow meters used in America and Canada are orifices. In China, the figure is approximately 85%. As we know there are 8 geometric parameters primarily affect the orifice measurement performance. And in the past, some parameters can be measured by several large instruments in labs, but the others such as upstream edge radius cannot be given the quantitative value. It only estimated by experiences. Now all of the values are obtainable due to the development of the new portable 8 geometric parameters measurement instrument, which make use of the photoelectric induction technology. It is easy to operate and carry. A number of experiments have indicated it is accurate and reliable. Recently we are popularizing the new instrument in the field widely.