API MPMS 4.9.1 pdf download

API MPMS 4.9.1 pdf download.Manual of Petroleum Measurement Standards Chapter 4—Proving Systems a. The manual-return unidirectional prover, sometimes referred to as the measured distance, is an elementary form of an in-line prover that uses a section of pipeline as the prover section. Prover detector switches that define the calibrated volume of the prover section are placed at selected points along...