API MPMS Chapter 11.3.2 API Ethyle SECOND ED This standa suitable for ethylene (>9 phases. Giv is capable o properties u ethylene to uncertainty EOS results the primary api.org MPM ne De ITION | MAY 2 rd identifies a use in custod 9 %) in the g en flowing tem f calculating d sed to calcula custody trans statements in and do not in and seconda API MPMS 3.6 pdf free download.Manual of Petroleum Measurement Standards Chapter 3—Tank Gauging Section 6—Measurement of Liquid Hydrocarbons by Hybrid Tank Measurement Systems. 4 Definitions For the purpose of this standard, the following definitions apply: 4.1 HTMS: A Hybrid Tank Measurement System (HTMS) is a system which uses the product level measured by an auto- matic tank gauge (ATG