API MPMS Chapter 14.1:2016

The purpose of this standard is to provide a comprehensive guideline for properly collecting, conditioning, and handling representative samples of natural gas that are at or above their hydrocarbon dew point.The standard considers spot, composite, continuous, and mobile sampling systems. This standard does not include sampling of liquid streams.This standard includes comments identifying special areas of concern or importance for each sampling method included. It is intended for custody transfer measurement systems and may be applicable to allocation measurement systems.The accuracy of moisture determinations from samples collected using the recommendations in this standard has not been determined.This standard does not include sampling multi-phase flow (free liquid and gas) or supercritical fluids.