API MPMS Chapter 6.4A PDF
This standard is part of a set of documents that details the minimum requirements for metering systems in single-phase liquid applications. This standard (Chapter 6.4A) details the specific requirements for the design, selection, and operation of lease automatic custody transfer (LACT) metering systems.
This standard serves as a guide in the selection, installation, and operation of lease automatic custody transfer (LACT) metering systems. This standard does not endorse or advocate the preferential use of any specific type of metering system or metering system components.
In general, metering system installations have to meet certain fundamental requirements, including proper selection, sizing, and installation of metering system components, as well as inclusion of adequate protective and readout devices. Descriptions of metering system components are included either in this standard or other API MPMS chapters.
Parts of Chapter 6 describe metering system design, selection, and operation. Chapter 6.1A describes the general considerations applicable to all metering systems, and shall be consulted together with Chapter 6.4A (this section) when designing, selecting, and operating LACT measurement systems. When aspects are covered under the scope of other chapters of the API Manual of Petroleum Measurement Standards (MPMS), and to avoid replication and conflict, they are not covered by this standard. In these cases, this standard provides limited information and refers the user to those chapters.
For guidance on the design, selection, and operation of truck and rail loading and unloading systems, including truckmounted meters, refer to Chapter 6.2A. For guidance on the design, selection, and operation of pipeline and marine loading/unloading metering systems, refer to Chapter 6.3A.
