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API MPMS 18.1 2002 Edition, April 1, 1997
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Manual of Petroleum Measurement Standards Chapter 18-Custody Transfer - Section 1-Measurement Procedures for Crude Oil Gathered from Small Tanks by Truck
Includes all amendments and changes through Reaffirmation Notice , February 2012
Additional Comments: H18012
Page Count:24
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Scope and Field of Application

These procedures are organized into a recommended sequence of steps for manually determining the quantity and quality of crude oil being transferred under field conditions. These measurements and tests are performed by crude oil truck drivers (COTDs) and other parties who are responsible for the custody transfer and for recording the results of the measurements and tests on run tickets.

Since the ownership of the crude oil being gathered may change and the custody is always passed from the storage tank to the transporting truck as the crude oil passes the tank's last Þxed outlet flange, accurate custody transfer is extremely important to both the shipper and the carrier. Therefore, all measurements shall be taken carefully and completed to the full satisfaction of all parties or their authorized representatives.