FLOWMETERS

IN-HOUSE FLOWMETER CALIBRATION RIG

Intervention Rentals In-house flowmeter calibration rig, currently using water as the test fluid, has been constructed using a stainless steel tank and pipework.

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.

PRESSURE GAUGES

Intervention Rentals calibration laboratory is equipped to perform calibrations on a variety of pressure instrumentation and gauges in pressures up to 350 Barg. Industry standard Hydraulic Deadweight testers are utilised throughout the lab due to their unmatched stability, repeatability, and accuracy. Their simple operation coupled to the afore mentioned characteristics allow for a quick turnaround of instrumentation calibrations while maintaining high degree of accuracy.

In addition to dead weight testers a range of Digital Air calibrators are also available with ranges extending up to 2500 mBarg allowing calibration across lower pressure ranges. The integrated digital control allows highly accurate calibrations on small resolution gauges where a deadweight tester’s broader range may not be ideal.

Calibration parameters are configurable to reflect the criticality required from the instrumentation. Intervention Rentals calibration lab can accommodate calibrations ranging from industry standard 5 point calibrations all the way to multi point/multi pass calibrations.

Intervention Rentals commitment to service excellence has seen them achieve the industry standard ISO 9000/9001 accreditation. Further to this the process for accreditation in accordance to ISO 17025 for pressure and flow calibrations is well under way with a view to accreditation being in place towards the end of 2014.

WEIGHT INDICATORS

Intervention Rentals calibration laboratory is equipped to perform calibrations on a variety of weight indication equipment from simple load cells to drilling rig load indicators. Depending on the utilisation of the weight indicator a calibration methodology/technology is selected to best suit the requirement. From there the same industry leading service is applied as is given to a standard pressure calibration.

Calibration parameters are configurable to reflect the criticality required from the instrumentation. Intervention Rentals calibration lab can accommodate calibrations ranging from industry standard 5 point calibrations all the way to multi point/multi pass calibrations.

Intervention Rentals commitment to service excellence has seen them achieve the industry standard ISO 9000/9001 accreditation. Further to this the process for accreditation in accordance to ISO 17025 for pressure and flow calibrations is well under way with a view to accreditation being in place towards the end of 2014.

CHART RECORDERS

Chart Recorders play a critical role in the monitoring and documenting of a variety of operations and as such require regular maintenance and periodic recalibration.

Intervention Rentals calibration lab are equipped to provide fast turnaround calibration services helping minimise the downtime required. The extensive range of deadweight testers and digital calibrators allow the best calibration technology to be selected based on the equipment requirements and configurations. Intervention Rentals are ISO 9000/9001 accredited and are on course for a 3rd quarter accreditation to ISO17025 for pressure and flow calibrations.

DIFFERENTIAL PRESSURE

By the nature of their function calibrations of Differential Pressure equipment require a different approach to that of a static pressure calibration. Intervention Rentals range of digital air calibrators allow differential pressure calibrations to be performed to pressures ranges in the inches of water column. The digital air calibrators highly sensitive instrumentation give excellent repeatability and the resolution makes calibrations at very low differential pressures a possibility regardless of the static pressure range of the instrument. Intervention Rentals lab technicians are able to tailor the calibration process to suit the instruments application and level of criticality; multiple data points can be taken for both rising and falling pressures and additional passes across the instruments full measuring range can be accommodated. Intervention Rentals commitment to service has resulted in accreditation to ISO9000/9001 and work is under way to have ISO 17025 accreditation in place in 2015 for both pressure and flow calibrations.

Intervention Rentals
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