This practice describes general procedures and equipment for automatically obtaining samples of liquid petroleum and petroleum products@ crude oils@ and intermediate products from the sample point into the primary container. This practice also provides additional specific information about sample container selection@ preparation@ and sample handling. If sampling is for the precise determination of volatility@ use Practice D5842 (API MPMS Chapter 8.4) in conjunction with this practice. For sample mixing and handling@ refer to Practice D5854 (API MPMS Chapter 8.3). This practice does not cover sampling of electrical insulating oils and hydraulic fluids. Units??The values stated in either SI units or US Customary (USC) units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore@ each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Except where there is no direct SI equivalent@ such as for National Pipe Threads/diameters@ or tubing. This standard does not purport to address all of the safety concerns@ if any@ associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. *A Summary of Changes section appears at the end of this standard