Flowmetering Orifice plate flowmeters
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Pipe sizes available Tab handled plates with or without carriers are available to suit the following pipe sizes: DN25, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500 and DN600. (1”, 1½”, 2”, 2½”, 3”, 4”, 5”, 6”, 8”, 10”, 12”, 14”, 16”, 18”, 20” and 24”)
Connections Tab handled plates and carriers are available to suit the following flange specifications: EN 1092 PN16, PN25 and PN40. BS 10 Table H.
ASME B 16.5 Class 150, 300, 600. Japanese Industrial Standard JIS 20. Korean Standard KS 20.
Materials Tab handled orifice plate
BS 1449 S 316 (Stainless Steel Grade 316)
Carrier
Passivated zinc plated carbon steel
Gaskets
Exfoliated graphite
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Pressure tappings When the tab handled orifice plates are used without the optional carrier, it is the responsibility of the user to provide appropriate presssure tappings in either his flanges or upstream and downstream pipework in line with BS 1042/ISO 5167. The optional carrier assembly incorporates upstream and downstream pressure tappings threaded ½" NPT. These tappings are 25.4 mm either side of the orifice plate face in line with the requirements of BS 1042 /ISO 5167.
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions supplied with the product. Installation note:
It is important that all details of the installation conform to BS 1042 /ISO 5167. Of special note, is the long, straight lengths of pipe that must be present upstream of the orifice plate. As an approximate guide, 20 to 30 pipe diameters upstream and 5 downstream should be adequate but it is recommended that reference is made to the relevant standard (BS 1042 / ISO 5167). A summary of the basic requirements is included with the M410 equipment. Maintenance note: A visual inspection of the orifice plate should be made at regular intervals to check for dirt build-up, damage or a loss of sharpness of the upstream edge of the plate. Replacement orifice plates and gaskets are available from Spirax Sarco. How to specify Orifice plate primary element with/without optional carrier assembly conforming to BS 1042 / ISO 5167.
Associated equipment Item
Description
EL2211
Temperature sensor/transmitter
EL2230 EL2600
Temperature sensor/transmitter
Pressure transmitter
For a general description of Spirax Sarco orifice plate flowmetering systems, see TI-P176-03 (density compensated system) and TI-P176-01 (non density compensated system).
EL2810
Temperature sensor/transmitter
F50C
Isolation valve
M610
Transmitter assembly
M750
Display unit
M850
Steam flow computer
TI-P176-02 EMM Issue 6
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M410 Orifice Plate Flowmeter and Carrier Assembly
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