This standard deals with pipe provers and with their use for testing measuring systems for liquids other than water (hereinafter called “measuring systems”), in order to verify that they comply with the relevant metrological requirements in the Gulf Standard “Measuring systems for liquids other than water”. In clauses 2 and 3, metrological characteristics of pipe provers are summarized, including their calibration. In clauses 4 to 8, methods are given for testing the following measuring systems: • measuring systems on road tankers, • measuring systems for the unloading of road and rail tankers, ships’ tanks and tank containers, • measuring systems, for the loading of road and rail tankers, ships’ tanks and tank containers, • measuring systems on pipelines, • measuring systems for liquefied petroleum gas (LPG) under pressure, • LPG dispensers, • fuel dispensers, Other types of measuring systems or measuring systems for other kinds of liquids may generally be tested according to one of the above methods. However, when special methods should be used for a particular measuring system or certain liquid, they will be the subject of future amendments or separate standards. Many of the descriptions in this standard are referred to in the International Standards listed below in which more detailed information is found. • GSO …/…(1) Liquid hydrocarbons - Dynamic measurement - Proving systems for volumetric meters - Parts 1: General principles, 2: Pipe provers, 3: Pulse interpolation techniques, and 4: Guide for operators of pipe provers (draft)