This standard is applicable to single-phase measurement techniques upstream of the custody transfer points where custody transfer conditions are not possible. The standard presents single-phase flow measurement used in the allocation process and located downstream of the first stage of separation on a production facility. This standard addresses common allocation single-phase flow measurement devices for liquid hydrocarbons@ water@ and gas including ancillary flow measurement systems such as fuel@ flare@ and recirculation. This standard discusses configuration and operation of flow measurement equipment@ fluid properties@ production processing@ associated flow conditions@ and their effects on the quality of the flow measurement results. This standard discusses the possible impacts on these devices during inefficient and/or ineffective separation.