Utrustning för petroleum- och naturgasindustri

1.1 This document describes the design, use and calibration of volumetric measures (capacity measures)which are intended for use in fixed locations in a laboratory or in the field. It also covers portable and mobilemeasures. The scope covers applications particularly, but not exclusively, in the petroleum industry.Volumetric measures are classified as test measures or prover tanks depending on capacity and design.

1.2 The document excludes pressurised measures as used for LPG and LNG and measures for cryogenicliquids. Measures described in this document are primarily designed, calibrated and used to measurevolumes "to deliver", i.e. wetted and drained for a specified time before use. Many of the provisions willhowever apply equally to measures which are used "to contain", i.e. to measure a volume using a clean anddry measure.

1.3 Annex A provides a reference for formulae describing the properties of water and other materials used to define volume. This includes density, thermal expansion, compressibility and viscosity for pure, impureand saline water. It also provides property information for hydrocarbon liquids and materials used toconstruct measures.

1.4 Guidance is given regarding commonly expected uncertainties and calibration specifications.