Two independent centrifugal pumps with variable speed drives are used to control the flow rate through the rig. The tank has a multiple baffle and weir arrangement, which, together with the positive head curve characteristics of the pumps and long test section lengths, ensure ideal flow conditions are achieved.
Fiscal standard master meters provide the reference for flow and volume. These reference meters, along with pressure and temperature sensors, are all traceable to national standards, giving a verifiable accuracy of better than 0.25% for a flowmeter calibration. Higher accuracies will be achievable when the performance history develops. The system has been designed in conjunction with, and commissioned by, TUV NEL who are custodians of the UK national standards for flow measurement. The flow rig has a range of calibrated master meters giving a current calibration range from 2.5 to 4166 litres per minute (0.15 to 250 m3/hr). The rig is designed to calibrate flowmeters using both water and fuel oil. Most flow measurement devices can be calibrated using the flow rig, including liquid turbines, coriolis, positive displacement, vortex and differential pressure meters.
As part of its commitment to excellence in the flow measurement market Intervention Rentals operate a flow measurement calibration loop as part of its laboratory in the Lunan Bay facility. This class leading flow loop was designed with input from TUV/NEL; the holders of the UK national standard for flow measurement; to serve the oil and gas service market with a focus on fast turnaround while maintaining the high degree of professionalism required in this industry. With a usable flow range of 2.5 to 4166 Litres/Min most common meter ranges are accommodated for and Intervention Rentals range of available Flowline equipment most meter configurations are able to be interfaced. Fiscal accuracy meters allow calibrations to be carried out to an accuracy of 0.25%. The systems full stainless steel construction allows water or kerosene to be used as the calibration fluid. Furthermore, the modular design of the calibration loop allows for the calibration of all types of measurement technologies including coriollis, orifice plate, vortex, mag meters and ultrasonic metering.
The flow meter calibration requires more than dealing with the ranging and flowing of a fluid through a meter. All meters are given a full service and function prior to insertion into the loop allowing the lab technicians to identify any wear or damage that could impact a calibration thus minimising down time and saving costs associated unsuccessful calibration. Intervention Rentals extensive experience in flow measurement coupled with close working relationships with the industry’s leading manufacturers allows a service which belies the size of the company. With process of achieving ISO17025 certification well towards its target of late 2014 accreditation Intervention Rentals calibration services are ideally situated to provide calibration services to all flow measurement applications.