Insufficient standard orifice meter scale instrument installation of treatment

Abstract: the insufficient standard orifice meter scale instrument installation disposal way information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Instrument application range is very wide, is a petrochemical, environmental protection, building materials, food, electric power, metallurgy, light industry, municipal and national defense industries such as one of the common devices in the automation control, instrumentation personnel mainly involved in instrument selection, installation, maintenance and troubleshooting, etc. More flow meter manufacturers choose model price quote you are welcome to inquire, here is insufficient standard orifice meter scale instrument installation disposal way article details. Instrument's application range is very wide, is a petrochemical, environmental protection, building materials, food, electric power, metallurgy, light industry, municipal and national defense industries such as one of the common devices in the automation control, instrumentation personnel mainly involved in instrument selection, installation, maintenance and troubleshooting, etc. , instrument installation appears to be relatively simple, in fact, if the instrument installation specification, light causes inaccurate measurement, high failure rate, maintenance quantity increase, or may cause unplanned parking, even cause safety accidents. Orifice meter improperly installed, is not possible, the following specification even errors, which may lead to a measurement error. 1, straight pipe before and after the orifice plate is not in conformity with the requirements: the role of the straight pipe before and after the orifice plate is in order to guarantee the stability of the flow of the fluid in the pipeline, but often turn on due to the process piping, bifurcate, meet resistance, stable fluid disturbance becomes, resulting in measurement errors. Eliminating method is in accordance with requirements of the pipe before and after, the reasonable design the installation position of the throttle device. 2, orifice upstream and downstream surface damaged or orifice flange gasket: protrude the pipe orifice in transportation and construction personnel in the process of the orifice plate installation, easy to cause surface damage or a convex flange gasket pipe upstream and downstream, resulting in measurement errors. Elimination method is to improve the technical quality of the construction personnel and sense of responsibility. Construction personnel in the inspection hole carefully before install the orifice plate, if discover the orifice upstream and downstream surface is damaged, should be replaced in a timely manner; The installation should avoid to damage the hole in the process of orifice plate; When installing the flange gasket, want to make the center line of the flange gasket and the center line of the pipeline. 3, orifice upstream and downstream face pack: before installation, should correctly identify the direction of the flow direction of medium in pipeline and the orifice, otherwise will lead to the measured value is low. This is because the workers' carelessness, eliminating method is when installing a orifice plate, make it says on the orifice plate & other; +” The surface at the upstream side of flow. 4, different orifice plate is installed wrong location: particularly prone to this kind of situation in commissioning phase. In the trial stage, the process piping to scavenging for many times, frequent disassembling orifice. If the orifice size, slightly do not pay attention to errors will occur and change the orifice plate can be back to normal. Therefore in order for the instrument play zui greater function and role, and the correct selection is the primary condition, correct installation is the decisive factor. Orifice meter before installation note: 1, before installation, process piping should be purging, are attached to the instrument to prevent retention of ferromagnetic material in the pipeline, affect the performance of the instrument, even damage the instrument. If unavoidable, should be installed at the entrance of instrument magnetic filter. The instrument itself not to participate in the first sweep gas, so as not to damage the instrument. 2, instrument before to the process piping installation, should check for any damage. 3, instrument installation forms can be divided into vertical and horizontal installation, if it is perpendicular to the type of installation, shall ensure that the center of the instrument perpendicular to the vertical Angle is less than 2 & deg; ； If it is a horizontal installation, shall ensure that the level of the instrument center line and the horizontal Angle is less than 2 & deg; 。 4, instrument of the upstream and downstream piping should be the same as the instrument of caliber, connecting flange or thread should be with the instrument flange and match, the gauge length of straight pipe upstream shall ensure that at least is 5 times of nominal diameter, the downstream straight pipe length is greater than or equal to 250 mm. 5, because the instrument is through the magnetic coupling transmission signal, so in order to guarantee the performance of the instrument, install around at least 250 px, ferromagnetic materials are not allowed to exist. 6, the measuring gas meter, is under pressure from a specific calibration, if the export of gas in the instrument direct emissions to the atmosphere, will produce pressure drop on the float, and cause data distortion. If this is the working condition, a valve should be installed at the export of instrument. 7, installed in the pipeline instruments should not be the role of stress, the instrument gateway should have the appropriate pipe supports, can make the instrument in the zui small stress state. 8, installation of PTFE ( Ptfe) The lining of the instrument, be especially careful. Due to the pressure, under the action of PTFE will deformation, so the flange nut don't screwed too tight. 9, with a liquid crystal display instrument, try to avoid direct sunlight display when installation, reduce the service life of the LCD. 10, medium at low temperature measurement, the model should be chosen.

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