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Flowtech Measuring Instruments Pvt. Ltd.
ORIFICE FLANGE ASSEMBLY

ORIFICE FLANGE ASSEMBLY

Product catalog summary

Overview: The document provides technical specifications and details for "FLOWTECH" Orifice Flange Assemblies, which are used to measure the flow of liquids, gases, and steam in pipelines ranging from 2” to 32” in size. These assemblies are designed to offer accurate flow measurement with minimal maintenance and cost.

Specifications:

Design: Conforms to ISA RP 3.2, DN 1952, BS 1042, ISO-5167 standards.
Orifice Bore: Complies with ISO 5167 / BS 1042.
Accuracy: Within ± 1%.
Vent/Drain: Provided as per customer requirements, not drilled for orifice bores smaller than 25.4 mm.
Size Range: 50 mm to 800 mm.
Materials: Flanges made from A105, SS304, SS316, SS316L, CS, and other materials upon request. Orifice plates available in SS-304, SS-316, SS-316L, Hastelloy C, PP, PTFE.
Gaskets: Made from CAF, SS Spiral Wound + CAF, PTFE, PVC, Rubber, and other materials as requested.
Stud/Nut: ASTM A193 Gr.B7/ASTM A194 Class 2H.
Bore Calculation: ISO 5167-2003.
Types: Square Edge Concentric, Quadrant Edges, Conical entrance, Eccentric.
Pressure Tapings: Flange Taps/Corner Taps for 2" to 16", D x D/2 for sizes above 16".

Components and Features:

The assembly includes a mainline orifice plate sandwiched between two orifice flanges, with a tag plate indicating details like Tag NO, Orifice ID, Pipe ID, and Plate Material.
Pressure Tapings: Three types are used - Corner Tapping (1 ½” to 12”), Flange Tapping (2” to 20”), and D & D/2 Tapping (20” to 24”).
Main Line Orifice Plate Types: Square Edged Concentric, Eccentric, Quadrant Edge, and Conical Entrance, each suited for different flow conditions and fluid types.

Installation and Dimensions:

Weld neck orifice flanges are butt-welded into the pipeline and available in classes 150, 300, and 600, with raised face (RF) and ring type joint (RTJ) versions.
Tables provide bolt sizes, weights, and dimensions for weld neck orifice flanges in 300 lb RF and 600 lb RF configurations.

Additional Information:

Specifications are subject to change without notice.
FLOWTECH is an ISO 9001:2015 certified company with a global export presence and local dealers across various Indian cities.
Online calibration of flowmeter sizes 40 NB to 300 NB is available through high accuracy ultrasonic flowmeter at the site upon request.

Catalog excerpts

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.

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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) ACCURACY...

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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, high...

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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

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

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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.

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All Flowtech Measuring Instruments Pvt. Ltd. catalogs and technical brochures

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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