Our skilled technicians can calibrate mechanical, electrical and pressure equipment – whether owned by Blue Manta or the customer – and repair all high pressure equipment including pump systems, air systems and hydraulic systems. All calibration equipment is certified and traceable to national standards. The service can be provided both on and off site and we offer a 24 hour call out facility within the Nigeria. In addition to our internal calibration service, we can also supply calibration equipment and provide training to our client’s workforce on its use. Our sales staff and technicians can advise on all enquiries to ensure the service provided best meets the customer’s needs.
3.1 INSTRUMENT CALIBRATION
Most instruments need calibration and maintenance on a regular basis to maintain an optimum performance. ENVITE offers calibration devices and accessories for all probes. We can also calibrate your probes for you. We have a reminder service to help you remember that your instruments need calibration and maintenance.
The Rotronic calibration devices are small, airtight chambers that fit exactly to the respective probes. The lower part is a screw-mount lid, into which the humidity standard is filled, together with a textile pad. After a period of stabilization, typically 60 minutes at stable temperature, the required humidity value is attained. The instrument can now be calibrated against the humidity reference value. Calibration devices are available for the entire range of Rotronic products, and we can also supply calibration devices for third party probes.
The inner volume of the calibration device should not be too big; it should not exceed 50 ml of free space when the probe is mounted. When the volume is too big, the correct humidity may eventually not be generated and the calibration will be wrong.
ENVITE instrument is well equipped for calibration, maintenance and repair of measuring and control instrumentation. All calibrations by Envite are traceable to national and international standards. For pressure instruments we can also provide a calibration certificate. Envite has its own measuring laboratories and facilities to carry out calibrations. We can also carry out on-site calibrations. We have a reminder service to help you remember that your instruments need calibration and maintenance.
RELIEF VALVE TESTING AND CALIBRATION
The ENVITE Relief Valve Testing Service is used to test and recalibrate the set pressure of relief valves and also to carry out leakage tests in accordance with API 527.
The equipment package is approved by Lloyds for Zone 1 operation and consists of a haskel gas booster pump, pressure accumulator and control panel.
The relief valve under test is pressurised very slowly with nitrogen and the pressure monitored on two 150 mm test grade (+ 1/4% FSD) pressure gauges and recorded on a chart recorder. The set pressure is established from the chart recorder. The leak rate, at 90% of the set pressure is then measured by using a bubbler (as defined by API 527) and a flowmeter.
When a relief valve has been leak tested or recalibrated a certification of calibration/ test is issued and the relief valve identified and locked with a lead seal.
We are also sole distributors for Dickson Data, a US based company that are producers of Dickson Chart Recorders, Data Loggers and Software, which gives customers innovative solutions in the recording and monitoring of temperature, humidity, pressure and a variety of other variables.
3.2 INSTRUMENT LEASING
In addition to Envite internal calibration service, Envite can also supply calibration equipment and provide training to our client’s workforce on its use. Our sales staff and technicians can advise on all enquiries to ensure the service provided best meets the customer’s needs.
We lease gauges, temperature and pressure recorders, temperature data logger, pressure data logger, humidity data logger, temperature and pressure probes.
3.3 TESTING AND CERTIFICATION
Envite Nigeria Limited conduct specialized inspection such as MPI and UT for other servicing companies. On conclusion of the above inspection activities, a pressure testing of the chicksan, swivel, pop joint, hoses etc is carried by our operational team to ensure the integrity of the MPI and UT inspection.
However, should the client decide to carry out the pressure testing herself, then an Envite inspector must witness the testing operation, especially at test pressure and hold period. On the basis of been an eye witness, Envite inspector shall issue a certificate, authenticating the testing operation. See below pictures of a typical testing spread under depressurization in a customer’s site.
3.4 STANDARD TEST BAY SERVICES
Envite offers on-site test bay services, our test bay are built in portable offshore container or test cabin as Envite test bay is called. This portable container can be move from one location to another for easy client attention and quality delivery, taken into consideration importance of time in the oil and gas industries.
This services can be made available in all production platforms, FPSO, construction site etc, for the calibrations of pressure gauges, pressure recorders, multimeters, torgue wrenches, dew point meters, gas testers, elcometers, positest adhesion tester, measuring scales etc. Kindly see our 20 feet mobile calibration laboratory as shown in the pictures below. .