HM 47. Recommended operational practice for proving LPG meters (Formerly PMM Part X, S13 )

Overview:

This publication was reapproved in 2022.

This publication addresses the proving of LPG meters on vehicles, in distribution terminals and refineries. It looks at methods currently employed within the industry, and its primary objective is to promote uniformity and consistency in both meter proving and the interpretation of results.

In order to ensure that an LPG meter is reading accurately, it is necessary to periodically carry out a test or series of tests in which its readings are compared with measurements obtained from proving equipment that is traceable to national standards. For satisfactory results skilled personnel should carry out proving in accordance with an agreed procedure based on this document.

Sets out guidelines for proving against volumetric and gravimetric devices. Recent developments are addressed, such as the use of load cells to measure the mass of LPG in storage or vehicle tanks.

Essential reading for all involved with the measurement of LPG and the proving of LPG meters.