• High Pressure Coriolis Flowmeter Suitable for Custody Transfer Released

Flow Level Pressure

High Pressure Coriolis Flowmeter Suitable for Custody Transfer Released

Apr 10 2015

Endress+Hauser (USA) announces the Proline Promass O Coriolis flowmeter for use in corrosive, high pressure and high temperature environments in the oil and gas industry. All materials that can come in contact with gasses and fluids are manufactured from super duplex stainless steel with 25% Cr (25 Cr duplex), which offers high protection against saline seawater, hydrogen sulphide, chloride, carbon dioxide and other corrosive materials found in crude oil and natural gas. The T316L stainless steel external design also resists corrosion from salt and sea water exposure.

The 25 Cr duplex sensing tube fulfils all requirements in accordance with NORSOK M-630 and NACE MR175/MR103; as well as corresponding Pressure Equipment Directives like PED Cat. III, ASME, CRN and AD2000. This makes the O suitable for use on offshore drilling platforms, floating production storage and offloading (FPSO) facilities, on-shore well fields, custody transfer systems and refineries.

The Promass O was also designed to handle the increasing pressure and temperature requirements of today’s oil and gas exploration environments. As easily-accessible resources are depleted, drilling is moving into deeper and more unfavorable environments. Oil and gas from such holdings often contain poisonous and chemically corrosive substances under very high pressures.

The Promass O handles pressures up to 3,742 psi (258 Bar) and process temperatures from -40 to 392F (-40 to 200C). Both are available in lines sizes of 3, 4 and 6 inch diameters.

Every flowmeter is subjected to rigorous testing on accredited (ISO/IEC 17025) and fully traceable calibration facilities to a maximum measured error of ±0.05%. The Promass O is approved for United States custody transfer per API MPMS Chapter 5.6 and AGA 11; NTEP and Measurement Canada weights and measures approvals are pending.

Promass O output configuration options include digital communications, supporting Foundation Fieldbus, Profibus PA or DP, EtherNet/IP or Modbus RS485 installations. Promass O analogue outputs for 0-10 kHz phase shifted pulse/frequency are also available when custody transfer proving requirements are mandated.

When using the 4-20mA output with HART, intrinsically safe applications for Class 1 Division 1 and other hazardous locations can be satisfied. Promass O has been submitted for a SIL-2 rating for critical applications and complies with NE43 (NAMUR) safety standards, including operating down to 3.6 mA in a fail-safe condition.

Both have built-in diagnostics, and display clear English text errors and root causes on local displays in case of a fault. The flowmeters can also be commissioned and diagnosed with Endress+Hauser’s FieldCare software. If servicing is needed, its DAT function automatic data backup ensures automatic reconfiguration of a repaired or new meter without the need for recalibration.

Promass O simultaneously measure mass flow, fluid density and temperature, are highly immune to external disturbances such as pipeline vibration, and are stable under changing process conditions such as pressure, density, temperature or viscosity. 


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