Alderley

Technical excellence: delivered

Application NotesPropane Metering

Project Name:Prelude FLNG EPCI Project

Location:Block WA-371, East Browse Basin, offshore north west Australia

EPC Contractor/Consultants:Technip France

End User:Shell Development Australia

Scope of ApplicationA cryogenic export metering system for propane, operating at -41°C and up to 3300m³/h flow rate, utilising coriolis mass flow meters in 4 x 33% configuration with a master meter stream that can be connected in series. The scope of supply also includes a metering control system, incorporating Alderley’s Hawk Supervisory System.

Alderley has also supplied an insulated export metering system for butane and an export metering system for condensate as part of this project.

Prelude FLNG

Alderley

www.alderley.com

Rev. 06.01.17

Applicable Standards

AGA 8: Super Compressibility Calculation of Natural Gas and Other Related Hydrocarbon Gases

API MPMS Chp. 4.5: Proving System, Section 5 - Master Meter Provers

API MPMS Chp. 5.6: Metering, Section 6 - Liquid Metering Measurement of Liquid Hydrocarbons by Coriolis Meters

API MPMS Chp. 6.5: Metering Assemblies, Section 5 - Metering Systems for Loading and Unloading Marine Bulk

Carriers

API MPMS Chp. 12.2: Calculation of Petroleum Quantities, Section 2 - Using Dynamic Measurement Methods and

Volumetric Correction Factors (Part 1 - Part 3)

ISO 3171: Petroleum liquids - Automatic pipeline sampling

ISO 6974-1: Natural gas - Determination of composition with defined uncertainty by gas chromatography.

Part 1: General guidelines and calculation of composition

ISO 6974-2: Natural gas - Determination of composition with defined uncertainty by gas chromatography.

Part 2: Uncertainty calculations

ISO 6976: Natural gas - Calculation of calorific values, density, relative density and Wobbe index from

composition

ISO 10790: Measurement of fluid flow in closed conduits - Guidance to the selection, installation and use of

Coriolis meters

OIML R117-1: Measuring Systems for Liquids other than Water

• 4 x 33% DN250 (10” NB) ANSI 150 meter streams with DN200 (8” NB) cryogenic coriolis mass flow meters

• 1 x DN250 (10” NB) ANSI 150 master meter streams with DN200 (8” NB) cryogenic coriolis mass flow master meter

• 4 x DN250 (10” NB) ANSI 150 reduced bore motor-operated cryogenic ball valves with single- piston-effect seals

• 9 x DN250 (10” NB) ANSI 150 reduced bore motor-operated cryogenic ball valves with double- piston-effect seals

• 5 x DN250 (10” NB) ANSI 150 air-actuated cryogenic butterfly flow balancing valves

• 5 x DN20/DN25 (0.75”/1” NB) ANSI 150 thermal expansion relief valves

• Gauge pressure transmitters, 4-20mA output

• Temperature transmitters, 4-20mA output, with RTD

• Small bore cryogenic valves for drain, vent and instrument isolation

Main Equipment