ABB FPD160 Orifice Flange Assembly

Overview

The ABB FPD160 Orifice Flange Assembly is a foundational primary flow element designed to deliver exceptional accuracy and reliability in differential pressure (DP) flow measurement systems. Engineered by ABB, a global leader in industrial instrumentation, the FPD160 series provides a complete, ready-to-install solution that includes the orifice plate, specialized weld-in flanges, gaskets, nuts, bolts, and jacking screws. Seven Star LLC, a premier supplier of advanced industrial instrumentation, proudly distributes the FPD160 to demanding sectors across the Sultanate of Oman and the broader GCC region.

Unlike standalone orifice plates that require custom pipeline modifications, the FPD160 assembly is a comprehensive package designed for seamless integration. The inclusion of heavy-duty jacking screws allows maintenance teams to safely and easily separate the flanges to inspect or replace the orifice plate without dismantling major pipeline sections. This significantly reduces maintenance downtime and ensures continuous operational efficiency in critical processing plants.

Measurement Principle

The FPD160 operates on the proven principle of differential pressure flow measurement. By introducing a deliberate restriction (the orifice plate) into the pipeline, the fluid velocity increases as it passes through the bore, causing a corresponding drop in static pressure. The precise differential pressure created across the plate is directly proportional to the square of the flow rate.

To accurately capture this differential pressure, the FPD160 flanges are machined with highly precise, integral tapping points (tapping size and thread type specified at order, for example 1/2 in. NPT). These tappings connect directly to a secondary DP transmitter, which calculates the exact volumetric or mass flow. Because the entire assembly is manufactured to strict ISO 5167:2003 tolerances, the resulting measurement is incredibly accurate and repeatable, making it a widely used primary element for differential pressure flow measurement.

Engineering Design & Materials

The mechanical architecture of the ABB FPD160 is engineered to withstand extreme pressures and corrosive environments. The flanges are designed in strict accordance with ASME B16.36, ensuring they meet the highest global standards for pressure-retaining components. Customers can select from Raised Face (RF), Flat Face (FF), or Ring Type Joint (RTJ) flange configurations to perfectly match their existing piping infrastructure.

Material selection is equally robust. The orifice plate itself is typically machined from high-grade 316 Stainless Steel to resist erosion and chemical attack, while the flanges can be specified in Carbon Steel, Stainless Steel, or exotic alloys depending on the application. To accommodate a vast array of fluid dynamics, ABB offers multiple orifice profiles, including concentric square-edge for clean fluids, quarter-circle for viscous liquids, and eccentric or segmental profiles for dirty, particulate-laden media.

Key Features

• Complete, ready-to-install assembly including orifice plate, ASME B16.36 flanges, gaskets, and all necessary mounting hardware.
• Integrated jacking screws engineered into the flanges to drastically simplify plate inspection and replacement, minimizing facility downtime.
• Manufactured in strict compliance with ISO 5167:2003 standards for guaranteed differential pressure measurement accuracy.
• Available with multiple plate profiles (Concentric, Quarter-circle, Conical, Eccentric, Segmental) to handle clean, viscous, or contaminated fluids.
• Flange configurations available in Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ) to suit diverse piping architectures.
• Machined with highly accurate integral tappings (1/2 in. or 3/4 in., specified at order) for immediate connection to DP transmitters.
• Orifice plates feature an integral data tab for instant identification of tag numbers and bore sizes without removing the plate from the line.

Industrial Applications

The rugged dependability of the ABB FPD160 Orifice Flange Assembly makes it ubiquitous across heavy industries. In the oil and gas refineries of Oman, these assemblies are critical for measuring the flow of high-pressure steam, natural gas, and refined hydrocarbons where extreme temperatures and volatile conditions prohibit the use of fragile electronic inline meters.

Furthermore, the petrochemical and chemical processing sectors rely heavily on the FPD160 due to its availability in exotic, corrosion-resistant materials and specialized plate profiles designed for heavily contaminated slurries. Seven Star LLC provides comprehensive procurement support for these complex assemblies, ensuring that EPC contractors and facility engineers receive the exact material and dimensional specifications required for their unique flow applications.

Sizing, Pressure Classes, and Material Options

ABB publishes the ABB FPD160 orifice flange union across an unusually wide dimensional envelope, which is one of the reasons it appears on so many refinery and utility line lists. Concentric square-edge assemblies are catalogued from DN 15 (1/2 in.) through DN 900 (36 in.), with narrower size ranges applying to the conical entrance, quarter-circle, eccentric, and segmental plate profiles. Pressure classes cover ASME Class 300, 400, 600, 900, 1500, and 2500, so a single product family can serve everything from a low-pressure utility header to a high-pressure gas or steam service without introducing a second supplier and a second set of certification paperwork.

Material breadth is equally deliberate. Plates and flanges are available in 316/316L stainless steel and carbon steel as standard, with duplex and super duplex, Alloy 625, and chrome-moly (CrMo) grades offered where chloride attack, sour service, or elevated-temperature creep rule out the standard grades — a genuinely relevant consideration for seawater-adjacent and sour gas duties in Oman. Gaskets are supplied asbestos-free, typically as spiral wound construction with alloy windings matched to the process. Tapping arrangements can be specified as one, two, three, or four sets, in threaded female, nipolet, or socket-weld form, allowing a single assembly to serve a duty transmitter, a check transmitter, and a local indicator from the same primary element.

Specification and Installation Notes

Two points are worth settling at the enquiry stage. First, the FPD160 designation refers to the complete orifice flange union — plate plus matched flange pair, bolting, gaskets, and jacking bolts — whereas ABB’s FPD150 designation covers the orifice plate supplied on its own for installation into existing flanges. Ordering the wrong one is the single most common procurement error on this product family, and it is easily avoided by confirming whether the pipeline flanges are being replaced or retained.

Second, differential pressure primary elements only deliver their published uncertainty when the upstream and downstream straight-run requirements of ISO 5167 are respected. Bends, tees, reducers, and partially open valves upstream of the plate distort the velocity profile and introduce error that no amount of transmitter accuracy can recover, so the plate location should be fixed against the standard’s straight-length tables during the piping design rather than after installation. Seven Star LLC reviews line size, beta ratio, design flow, and available straight run with the specifying engineer before quoting, ensuring the ABB FPD160 assembly supplied to sites in Muscat, Sohar, and Salalah is dimensionally and metallurgically correct for the service the first time.

Technical Specifications

Request a Quote for ABB FPD160 Orifice Flange Assembly

To specify the exact dimensions for your pipeline, request a formal quotation, or download the comprehensive technical datasheet for the ABB FPD160 Orifice Flange Assembly, please consult the industrial instrumentation experts at Seven Star LLC today. As a premier supplier of advanced flow measurement technologies in Oman and the GCC, our engineering team is ready to assist you in selecting the perfect primary element for your process control requirements.

Related Products

• ABB-Thermal mass flowmeter Sensyflow FMT700-P and FMT700-P Compact
• ABB-Swirl flowmeter SwirlMaster FSS450
• Yokogawa ROTAMASS Total Insight Coriolis Mass Flowmeter
• Emerson Rosemount 8700 Magnetic Flowmeter
• Endress+Hauser Prosonic Flow 92F Ultrasonic Flowmeter
• Endress+Hauser t-mass 65F Thermal Mass Flowmeter