scope:

INTRODUCTION

With the recent emphasis on reformulated gasolines, there is an increasing demand to use methyl tert-butyl ether (MTBE) as a blending agent for reformulated gasolines. The accurate transfer of MTBE requires that the volume being transferred be temperature compensated back to customary reference conditions. Within the United States, those conditions are 60°F and the maximum of saturation pressure or atmospheric pressure. Most other countries have reference conditions of 15°C and the maximum of saturation pressure or atmospheric pressure.

PURPOSE

The purpose of this addendum is to provide the users of the API Manual of Petroleum Measurement Standards Chapter 11.1, "Volume Correction Factors," Volume III (Table 6C) and Volume IX (Table 54C), "Individual and Specialized Applications," with revised volume correction factor tables for methyl tert-butyl ether (MTBE). These tables are used for calculating the volume of mixtures composed predominantly of MTBE at standard conditions from volumes at other conditions. These tables apply to commercially available mixtures containing at least 85 weight percent MTBE.

SAFETY CONSIDERATIONS

This standard does not purport to address the safety problems, if any, associated with the use of this publication. It is the responsibility of the user of this standard to establish the appropriate safety and health practices and to determine the applicability of regulatory limitations prior to its use.