MEASUREMENT OF FLUID FLOW BY MEANS OF PRESSURE DIFFERENTIAL DEVICES INSERTED IN CIRCULAR CROSS-SECTION CONDUITS RUNNING FULL – PART 2: ORIFICE PLATES (ISO 5167-2:2003, IDT)
This Malaysian Standard specifi
This Malaysian Standard also provides background information for calculating the flowrate and is applicable in conjunction with the requirements given in MS ISO 5167-1.
This Malaysian Standard is applicable to primary devices having an orifice plate used with flange pressure tappings, or with corner pressure tappings, or with D and D/2 pressure tappings. Other pressure tappings such as “vena contracta” and pipe tappings have been used with orifice plates but are not covered by Malaysian Standard. This Malaysian Standard is applicable only to a flow which remains subsonic throughout the measuring section and where the fluid can be considered as single phase. It is not applicable to the measurement of pulsating flow. It does not cover the use of orifice plates in pipe sizes less than 50 mm or more than 1 000 mm, or for pipe Reynolds numbers below 5 000.es the geometry and method of use (installation and operating conditions) of orifice plates when they a
