[What You Need To Know About Tank Calibration?]
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Petrospection is accredited by the National Association of Testing Authorities, Australia (NATA) as a metrology laboratory to perform the calibration of industrial storage tanks by strapping, optical reference line and liquid calibration methods, including: -
vertical cylindrical tanks (including cryogenic and pressurised tanks)
horizontal and inclined cylindrical tanks (including rail cars and isotainers)
Petrospection is the only tank calibration company in Western Australia holding NATA metrology accreditation for the local operation. The NATA signatories are based in the Perth head office.
However Petrospection are not confined to Western Australia. Many tanks have been calibrated by Petrospection as far a-field as the east and north coasts of Australia and the North West Pacific and New Zealand.
Vertical tanks requiring NATA endorsement are calibrated to ISO Standard 7507, IP 202/69 or API 2550.
Over the last five years, the ISO Standard has essentially superseded the other tank calibration methods in Australia and the surrounding region. The ISO Standard is based on the IP method, though it is better suited for computerisation than the IP method.
Horizontal tanks are essentially calibrated to API Standard 2551 for NATA endorsement.
The Petrospection software addresses the shortcomings of this standard by
incorporating the calculation of conical heads, all dished head variations and
tanks with a very high inclination (such as aviation tanks), while otherwise
remaining traceable to the Standard.
Tanks can also be calibrated without NATA endorsement, if required.
Petrospection are successful in the tank calibration industry because of their innovation and regard for detail. For example, by expanding the tank survey operation to collect a more comprehensive data set and through the development of specialised software, Petrospection have extended their services to include Tank Settlement and Roundness Survey reports (by request).
As terminal operators, Petrospection continuously refer to tank calibration tables and appreciate what information is relevant to tank operation and planning.
In addition to the volumetric information usually found in a tank calibration table, a Petrospection table includes comprehensive information about the height and type of internal tank fittings and a tank schematic showing the orientation and location of the fittings, along with other general information which may assist terminal operators.
Petrospection tables are in colour and the critical ranges such as liquid levels below the highest point of the floor, levels above maximum safe fill height and levels within the zone of partial displacement of the floating roof or blanket are highlighted and annotated in bold colour. The tables are also laminated as part of the standard service.
In addition to tank calibrations, Petrospection can also provide dipsticks (for smaller bulk tanks) in either square section aluminium or stainless steel. Aluminium dipsticks are computer scribed and engraved, while stainless steel dipsticks are hand scribed and stamped in our workshop. Stainless steel dip tapes can also be supplied for larger storage tanks.
Petrospection personnel are trained in the use of BA equipment and confined space entry.