See www.cofrac.fr for scope (it may be communicated on request)
TRAPIL’s meter calibration station was the first calibration laboratory in France to be approved by the French Accreditation Committee (COFRAC) for “liquid flow measurement – dynamic volume and mass measurement,” under the number 2-1194 (see www.cofrac.fr for scope). Leveraging our technical competencies and improvements driven by quality management systems, we have since teamed up with the French National Measurement and Testing Laboratory (LNE) to become the national benchmark for measuring the flow of liquids other than water.
The laboratory’s quality management system, based on standard NF EN ISO/IEC 17025 and specific recommendations, is regularly audited by COFRAC. COFRAC accreditation means that the accuracy of our calibration services is recognized by other countries under mutual recognition agreements between accreditation organizations.
Calibration Areas
The following tables provide details of our prover loop capacities.
| Installations |
|
|
| Volume flowrates |
10 to 600 m3/h |
60 to 2,500 m3/h |
| Mass flowrates |
7.5 to 520 t/h |
45 to 2,200 t/h |
| Pressure |
1 to 12 x 105 Pa |
| Temperature |
Not regulated, usually between 5 and 35°C |
| Instrument assembly |
Flanges up to 150 mm |
Flanges up to 400 mm |
Flange range from 150 to 900 ANSI and other standards |
The following products are available for the loops:
| Product |
Unleaded gasoline |
Jet fuel |
Home heating oil |
Light crude |
Heavy crude |
Oil |
Water |
| Viscosity at 20°C (mm2/s) |
0.5 to 0.7 |
1.5 to 2.0 |
3.5 to 8.0 |
8.0 to 20.0 |
20.0 to 50.0 |
70.0 to 120.0 |
1 |
| Approximate specific gravity (kg/m3) |
750 |
800 |
850 |
890 |
900 |
910 |
1000 |
Dynamic Volume Measurement
Calibration services are performed using two one-way pipe provers with a nominal standard volume of 2.5 to 10 cubic meters. Procedures and calculations are performed in compliance with ISO standards 4267 and 7278, as well as the main recommendations of organizations including the International Organization for Standardization (ISO), the International Organization of Legal Metrology (OIML) and the American Petroleum Institute (API).
| Product |
Unleaded gasoline |
Jet fuel |
Home heating oil |
Light crude |
Heavy crude |
Oil |
Water |
10” prover loop uncertainty
(E-4 Vm) |
±5.2 |
± 4.6 |
±4.4 |
±4.4 |
±4.4 |
±4.4 |
±4.4 |
20” prover loop uncertainty
(E-4 Vm) |
±4.7 |
±4.1 |
±3.9 |
±4.4 |
±4.4 |
±4.4 |
±3.92 |
Mass Flowrate Measurement
Mass flowrate calibration is performed using an indirect method and is not covered by the accreditation. The principle consists of volume flowrate calibration supported by sampling of the product in order to determine its specific gravity. This determination is performed by TRAPIL’s COFRAC-accredited specific gravity calibration laboratory.
This method’s applications include calibrating and adjusting flowmeters.
Final uncertainties are calculated on a case-by-case basis.
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