1、Manual of Petroleum Measurement Standards Chapter 12Calculation of Petroleum Quantities Addendum 1 August 2007SPECIAL NOTES API publications necessarily address problems of a general nature. With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed.
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12、., Washington, D.C. 20005. Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director. Generally, API Standards are reviewed and revised, reaffirmed, or withdrawn at least every five years. A one-time extension of up to
13、 two years may be added to this review cycle. Status of the publication can be ascertained from the API Standards Department, telephone (202) 682-8000. A catalog of API publications and materials is published annually and updated quarterly by API, 1220 L Street, N.W., Washington, D.C. 20005. Suggest
14、ed revisions are invited and should be submitted to the Standards and Publications Department, API, 1220 L Street, NW, Washington, D.C. 20005, standardsapi.org.Addendum 1 to API MPMS Chapter 12 Calculation of Petroleum Quantities 1 Guidance to Industry on the Application of API MPMS Chapter 11 Intro
15、duction After considerable time and effort, a revision of API MPMS Ch. 11.1 (Physical Properties DataTemperature and Pressure Correction Factors for Generalized Crude Oils, Refined Products, and Lubricating Oils) was published as an Adobe PDF file on CD with an accompanying executable program (for c
16、alculating and printing) in September 2004. Later that year, a CD with a Microsoft Excel Add-In was released, as was another CD with ANSI C-code subroutines. As users have started to implement the 2004 version of API MPMS Ch. 11.1, a number of concerns and questions have arisen on how the API MPMS C
17、h. 11.1 (2004) harmonizes with existing MPMS Standards, particularly API MPMS Ch. 12. MPMS Chapter Interrelationships Currently, the Manual of Petroleum Measurement Standards is organized into Chapters cov- ering general measurement areas and several of these Standards are interrelated. For instance
18、, numerous Standards reference API MPMS Ch. 11.1. There is at present consider- able uncertainty amongst users as to which takes precedence when Standards do not concur on a specific subject, in particular Chapters 11 and 12. When these differences occur the fol- lowing criteria should be applied. A
19、PI MPMS Ch. 11.1 is the primary standard for the determination of the temperature (CTL), pressure (CPL), and combined temperature and pressure (CTPL) correction factors for crude oil, refined products, and lubricating oils, either by presentation of specific imple- mentation procedures or by referen
20、ce to other publications. API MPMS Ch. 12 is the primary standard for the calculation of volume quantities. It deter- mines the discrimination levels (rounding) required for each input variable and correction factor in a specific volume calculation procedure, and the sequence and manner in which to
21、apply the appropriate parameters (RHO b , API b , RD b , CTL, F p , CPL, and CTPL). Note: While the determination of a combination pressure and temperature factor, CTPL, is specified in API MPMS Ch. 11.1, its application is not currently addressed in API MPMS Ch. 12 but will be upon the next revision. 8/07
