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JUL-AUG 2018

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38 INTECH JULY/AUGUST 2018 WWW.ISA.ORG SPECIAL SECTION Figure 13. Tank inventory parameters and calculations in DCS two-wire GWR for inventory tank gauging, as long as the vendors demonstrate a full compliance to API MPMS chap - ter 3.1B requirements. ACKNOWLEDGMENT The author would like to acknowledge the support of the Saudi Aramco Riyadh Refinery management, and to ac- knowledge Riyadh Refinery automation engineers Fawaz AlHadlaq and Khalid Batoq for their assis- tance in preparing this article and their commit- ment to conducting the pilot testing and building a new milestone. n ABOUT THE AUTHOR Fawaz AlSahan, CAP (Fawaz.sahan@aramco.com), is the chairman of Saudi Aramco instrumentation stan- dards. Fawaz is a certified engineering consultant (SCE) with 20 years of experience in instrumentation and automation. Fawaz has delivered many techni- cal papers and presentations, taught several courses, and holds three patents. View the online version at www.isa.org/intech/20180806. Figure 12. Manual gauging compared to GWR reading RESOURCES API MPMS chapter 3.1B, Standard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Tanks by Automatic Tank Gauging API MPMS chapter 7, Temperature Determination API MPMS chapter 12.1.1, Calculation of Static Petroleum Quantities-Upright Cylindrical Tanks and Marine Vessels ISO 4266-1: Measurement of Level in Atmospheric Tanks ISO 4266-4: Measurement of Temperature in Atmospheric Tanks ISO 11223: Measurement of Content of Vertical Storage Tanks by Hydrostatic Tank Gauging SAES-J-100 Process Measurement Standard Date Tank # Transmitter tag Transmitter reading (M) Hand dipping Difference (mm) 8 Mar 2015 945-V6 Z41-LI-4444 10.752 10.765 13 RYT-70 Z41-LI-1111 10.780 10.775 5 10 Mar 2015 D-006 Z41-LI-2222 10.790 10.782 8 RYT-70 Z41-LI-1111 10.54 10.535 5 11 Mar 2015 RYT-72 Z41-LI-3333 5.564 5.562 2 RYT-70 Z41-LI-1111 10.510 10.505 5 D-006 Z41-LI-2222 9.162 9.161 1 18 Mar 2015 RYT-72 Z41-LI-3333 4.995 4.986 9 945-V6 Z41-LI-4444 7.502 7.515 13 19 Mar 2015 D-006 Z41-LI-2222 10.876 10.871 5 RYT-70 Z41-LI-1111 10.328 10.344 16 23 Mar 2015 RYT-72 Z41-LI-3333 10.946 10.938 8 945-V6 Z41-LI-4444 14.018 14.029 11 26 Mar 2015 D-006 Z41-LI-2222 6.300 6.309 9 RYT-70 Z41-LI-1111 10.188 10.198 10 2 Apr 2015 RYT-72 Z41-LI-3333 11.155 11.143 12 945-V6 Z41-LI-4444 12.672 12.680 8 D-006 Z41-LI-2222 3.975 3.990 15 RYT-70 Z41-LI-1111 6.972 6.983 11 5 Apr 2015 D-006 Z41-LI-2222 13.731 13.725 6 RYT-70 Z41-LI-1111 11.167 11.170 3 RYT-72 Z41-LI-3333 7.479 7.473 6 945-V6 Z41-LI-4444 11.647 11.654 7

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