ORIFICE FLANGE ASSEMBLY
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DESCRIPTION “FLOWTECH” make “ORIFICE FLANGE ASSEMBLIES” measuring flow of various Liquids, Gases & Steam from 2” to 32” line sizes. It gives an acceptable level of uncertainties at lowest cost and long life without regular maintenances. Orifice Plates are most commonly used as primary element for flow measurement in pipelines based upon the principle of measurement of ‘Differential Pressure’ created when an obstruction is placed in the fluid flow, due to increase in fluid velocity. The orifice plate dimension is based on BS/ISO- 5167 specification.

OPERATING PRINCIPLE When fluids is flowing from main pipeline. Orifice plate restricts the flow and develops the Differential Pressure which is proportional to the square root of the flow rate. DESIGN STANDARDS The traditional orifice flange assembly consists of a pair of flanges, orifice plate, bolts, nuts, gaskets, jacking screws and plugs, (where requested). The flanges are generally weld neck design, but other options are available, such as Slip-on and threaded. (A) DESIGN Confirming to ISA RP 3.2, DN 1952, BS 1042, ISO-5167 (B) ORIFICE BORE :- Confirming to ISO 5167 / BS 1042 (C)...

PRESSURE TAPINGS : - There are three types of Pressure Tapings are used. (a) CORNER TAPPING : - These are mainly used for line sizes from 1 ½” to 12”. (b) FLANGE TAPPING : - These are mainly used for line sizes from 2” to 20”. (c) D & D/2 TAPPING : - These are mainly used for line sizes from 20” TO 24”. GASKETS, STUDS, NUTS & JACK SCREW : - For details please refer the Material of Construction section. MAIN LINE ORIFICE PLATE : - There are various types of Orifice Plates. (A) SQUARE EDGED CONCENTRIC: - These are commonly used for Flow Measurement. Its main features are simple structure,...

WELD NECK ORIFICE FLANGE ASSEMBLIES Weld neck orifice flanges are butt-welded into the pipeline. The inside diameter (or the schedule) of the pipe should be specified when ordering. Weld neck orifice flanges are available in classes 150,300 & 600. Raised face (RF) and ring type joint (RTJ) versions can be supplied. Bolt sizes, weights and important dimensions of orifice flange assemblies are shown in the following tables. DIMENSIONAL DETAILS 300 # WNRF

NOTE : ALL THE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

FLOWTECH MEASURING INSREUMNTS PVT. LTD. AN ISO 9001: 2015 COMPANY Works : 900/2/B, GIDC, Makarpura, Vadodara - 390010. Gujarat (India) Website : www.flowtech-instruments.com.www.flowtechinstruments.in Exporters to : BANGLADESH - DUBAI - EGYPT - FRANCE - INDONESIA - KUWAIT - MALAYSIA -NEPAL NIGERIA - POLAND - SARJAH - SINGAPORE - SRI LANKA - SOUTH AFRICA - THAILAND Local Dealers : AHMEDABAD - ANKLESHWAR - BHOPAL - CHENNAI - GANDHIDHAM HYDERABAD - INDORE - MUMBAI Note : DOING ONLINE CALIBRATION OF FLOWMETER SIZE 40 NB TO 300 NB THROUGH HIGH ACCURACY ULTRASONIC FLOWMETER AT SITE ON REQUEST.