Tank Gauging Standards Paper updated January 2007 Reference: American Petroleum Institute (API) Manual of Petroleum Measurement Standards Chapter 1 Vocabulary Chapter 2.2A Measurement and Calibration of Upright Cylindrical Tanks by the Manual Strapping Method; 01-Feb-1995 Chapter 2.2B Calibration of Upright Cylindrical Tanks Using the Optical Reference Line Method; 1st Edition, 01-Mar-1989 Chapter 3 Tank Gauging Chapter 3.1A Standard Practice for Manual Gauging of Petroleum and Petroleum Products in Stationary Tanks; First Edition 01-Dec-1994; Current Revision, dated 5 8/05 Chapter 3.1B Standard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Tanks by Automatic Tank Gauging; Second Edition, 01-Jun-2001; Revision 1, Reaffirmed 10/06 Chapter 3.2 Chapter 3.3 Chapter 3.4 Chapter 3.5 Chapter 3.6 Tank Gauging--Gauging Petroleum and Petroleum Products in Tank Cars, Revision 1995; Reaffirmed 3/01 Standard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Pressurized Storage Tanks by Automatic Tank Gauging, Revision 1996; Reaffirmed 10/06 Standard Practice for Level Measurement of Liquid Hydrocarbons on Marine Vessels by Automatic Tank Gauging; First Edition, April 1995; Reaffirmed 2/06 Standard Practice for Level Measurement of Light Hydrocarbon Liquids Onboard Marine Vessels by Automatic Tank Gauging; First Edition, March 1997; Reaffirmed 3/01 Measurement of Liquid Hydrocarbons by Hybrid Tank Measurement Systems. First Edition, April 2001; Reaffirmed 10/06 (Note: One of two (API 3.6 & 16.2) methods approved for volume measurement by API) Chapter 7 Temperature Determination; June 2001 1
Chapter 7.1 Static Temperature Determination Using Mercury-in-Glass Tank Thermometers; 01-Feb-1991 Chapter 7.2 Dynamic Temperature Determination; Second Edition, March 1995 Chapter 7.3 Chapter 7.4 Static Temperature Determination Using Portable Electronic Thermometers; 01-Jul-1985 Static Temperature Determination Using Fixed Automatic Tank Thermometers; 01-Jan-1993 Chapter 8.1 Manual Sampling of Petroleum and Petroleum Products; October 1995 Chapter 8.3 Chapter 8.4 Chapter 9 Chapter 9.1 Chapter 9.2 Chapter 9.3 Chapter 10 Mixing and Handling of Liquid Samples of Petroleum and Petroleum Products; 10-Jan-1996 Standard Practice for Sampling and Handling of Fuels for Volatility Measurement; Second Edition, 01-Dec-2004 Density Determination Hydrometer Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products; 01-Dec-2002 Standard Test Method for Density or Relative Density of Light Hydrocarbons by Pressure Hydrometer, Second Edition; 01-Mar-2003 Standard Test Method for Density, Relative Density, and API Gravity of Crude Petroleum and Liquid Petroleum Products by Thermohydrometer Method; 01-Nov-2002 Sediment and Water Chapter 10.1 Standard Test Method for Sediment in Crude Oils and Fuel Oils by the Extraction Method; Second Edition, 01-Oct-2002 Chapter 10.2 Determination of Water in Crude Oil by Distillation; 1st Edition, 01-Apr-1981; Revision 2005. Chapter 10.3 Standard Test Method for Water and Sediment in Crude Oil by the Centrifuge Method (Laboratory Procedure), Second Edition Edition: 01-May-2003 Chapter 10.4 Determination of Sediment and Water in Crude Oil by the Centrifuge Method (Field Procedure); Third Edition, 01-Jan-1999 2
Chapter 10.5 Manual of Petroleum Measurement Standards, Chapter 10-Sediment and Water, Section 5-Standard Test Method for Water in Petroleum Products and Bituminous Materials by Distillation; Fourth Edition, 01-Aug-2005 Chapter 10.6 Standard Test Method for Water and Sediment in Fuel Oils by the Centrifuge Method (Laboratory Procedure); Fourth Edition, 01-Dec-2004 Chapter 10.7 Sediment and Water - Section 7 - Standard Test Method for Water in Crude Oils by Potentiometric Karl Fischer Titration; 01-Dec-2002 Chapter 10.8 Standard Test Method for Sediment in Crude Oil by Membrane Filtration; Second Edition, 01-Nov-2005 Chapter 11.0 Volume Correction Factors Chapter 11.1 Temperature and pressure volume correction factors for generalized Crude oils, refined products, and lubricating oils. Revision 4 - May 2004 Chapter 11.1-11-50 Temperature and pressure volume correction factors for generalized Crude oils, refined products, and lubricating oils. Revision 4 - May 2004 Chapter 11.1-2-10 Temperature and pressure volume correction factors for generalized Crude oils, refined products, and lubricating oils. Revision 4 - May 2004 Chapter 11.1-51+ Temperature and pressure volume correction factors for generalized Crude oils, refined products, and lubricating oils. Revision 4 - May 2004 Chapter 12 Calculation of Petroleum Quantities Chapter 12.1.1 Interim Guidelines Interim Guidelines for the Determination of Ambient Air Temperature - Calculation of Petroleum Quantities - Part 1: Upright Cylindrical Tanks and Marine Vessels; 24-Apr-1998 Chapter 12.1.2 API Manual of Petroleum Measurement Standards 12.1.2, Calculation of Petroleum Quantities; 1 st Edition, 01-Nov-2001 Chapter 12.2 Calculation Using Dynamic Measurement Methods and Volumetric Correction Factors. Edition 01-Jun-2003 Chapter 14 Natural Gas Fluids Measurement Chapter 14.4 Converting Mass of Natural Gas Liquids and Vapors to Equivalent Liquid Volumes. First Edition, April 1991 3
Chapter 14.7 Natural Gas Fluids Measurement: Standard for Mass Measurement of Natural Gas Liquids; 01-Jan-1995, Revision 2006 Chapter 15 Chapter 16 Guidelines for the Use of the International System of Units (SI) in the Petroleum and Allied Industries. API Publication 2564. Second Edition, December 1983, Reaffirmed, August 1987 Measurement of Hydrocarbon Fluids by Weight or Mass Chapter 16.2 Mass Measurement of Liquid Hydrocarbons in Vertical Cylindrical Storage Tanks by Hydrostatic Tank Gauging. First Edition, November 1994 Reaffirmed 3/02 (Note: One of two methods for volume measurement approved by API) Chapter 17 Marine Measurement Chapter 17.2 Measurement of Cargoes On Board Tank Vessels; First Edition, July 1990 Chapter 17.2A Closed and Restricted Measurement; First Edition, November 1995 Chapter 19 Evaporative Loss Measurement Chapter 19.1 Evaporative Loss from Fixed-Roof Tanks; Third Edition, 01-Mar-2002 Chapter 19.2 Evaporative Loss from Floating Roof Tanks; Second Edition, 01-Sep- 2003 Chapter 19.3A Wind Tunnel Test Method for the Measurement of Deck-Fitting Loss Factors for External Floating-Roof Tanks; 01-Jun-1997 Chapter 19.3B Evaporative Loss Measurement: Air Concentration Test Method - Rim Seal Loss Factors for Internal Floating Roof Tanks; 01-Aug-1997 API RP 500 API 653 Recommended Practices for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division I and Division 2; 2nd Edition, 01-Nov-1997 Tank Inspections, Repair, Alteration, and Reconstruction First Edition, January 1991, Supplement 1, January 1992 Addendum 1-Tank Inspection, Repair, Alteration, and Reconstruction; Third Edition, 08-Sep-2003 Addendum 2; Tank Inspection, Repair, Alteration, and Reconstruction; Third Edition, 01-Nov-2005 API RP 2003 Recommended Practices for Protection against Ignition Arising Out of Static, Lightning, and Stray Currents; 10-Sep-1998 4
API 2509B Shop Testing of Automatic Liquid Level Gauges December 1961, Reaffirmed, August 1987 (Mechanical Tank Gauges) API RP 2510 Recommended Practices for The Design and Construction of Liquefied Petroleum Gas Installations at Marine and Pipeline Terminals, Natural Gasoline Plants, Refineries, and Tank Farms; 01-May-2001 API 2545 Method of Gauging Petroleum and Petroleum Products; October 1965, Reaffirmed, October 1992 (Hand Line Measurement, i.e., Custody Transfer) WITHDRAWN (See API 3.1 3.4) Reference: ASTM International (American Standard Testing Materials) D287-92e1 Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method) 2000 D1250 Volume Correction Factors (Joint Standard with API MPMS Chapter 11.1) D1250-04 Standard Guide for Use of the Petroleum Measurement Tables; 2000 Adjunct to D1250 Temperature and pressure volume correction factors for generalized crude oils, refined products, and lubricating oils. 01-May-2004, D1250 ADJ CD-2-10 D1298-99e2 Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method; 10-Jun-1999 D2161-05 Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity; 01-Apr-2005 D4052-96 Density and Relative Density of Liquids by Digital Density Meter; 10-Apr-1996 D4052-96(2002)e1 Standard Test Method for Density and Relative Density of Liquids by Digital Density Meter; Revised 2002 D4177-95 Automatic Sampling of PETROLEUM and PETROLEUM Products; 10-Apr-2000 D5002-94 Density and Relative Density of Crude Oils by Digital Density Analyzer D5002-99 Standard Test Method for Density and Relative Density of Crude Oils by Digital Density Analyzer; Revised 01-Nov-2005 5
Reference: International Standards Organization (ISO) Petroleum and Liquid Petroleum Products ISO 91-1:1992 ISO 91-2:1991 ISO/CD 3170 ISO 3170 AMD 1 ISO 3171:1998 ISO 3675:1998 ISO 3838:2004 ISO 3993:1984 ISO 4257:2001 ISO 4266:1994 Petroleum measurement tables -- Part 1: Tables based on reference temperatures of 15 degrees C and 60 degrees F Petroleum measurement tables -- Part 2: Tables based on a reference temperature of 20 degrees C Petroleum liquids -- Manual sampling Petroleum liquids - Manual sampling; Amendment 1, 01-Feb-1998 Petroleum liquids Automatic pipeline sampling Crude petroleum and liquid petroleum products; Laboratory determination of density, Hydrometer method Crude Petroleum and liquid petroleum products; Determination of density or relative density, Capillary-stoppered pyknometer and graduated bicapillary methods. Liquefied petroleum gas and light hydrocarbons -- Determination of density or relative density -- Pressure hydrometer method Liquefied petroleum gases; Method of sampling Petroleum and liquid petroleum products -- Measurement of temperature and level in storage tanks -- Automatic methods ISO 4266 - Part 1: 2002 Petroleum and liquid petroleum products Measurement of level and temperature in storage tanks by automatic methods - Part 1: Measurement of level in atmospheric tanks ISO 4266 Part 2: 2002 Petroleum and liquid petroleum products - Measurement of level and temperature in storage tanks by automatic methods -- Part 2: Measurement of level in marine vessels ISO 4266 Part 3:2002 Petroleum and liquid petroleum products - Measurement of level and temperature in storage tanks by automatic methods - Part 3: Measurement of level in pressurized storage tanks (nonrefrigerated) ISO 4266 Part 4: 2002 Petroleum and liquid petroleum products - Measurement of level and temperature in storage tanks by automatic methods - Part 4: Measurement of temperature in atmospheric tanks 6
ISO 4266 - Part 5: 2002 Petroleum and liquid petroleum products - Measurement of level and temperature in storage tanks by automatic methods -- Part 5: Measurement of temperature in marine vessels ISO 4266 Part 6: 2002 Petroleum and liquid petroleum products - Measurement of level and temperature in storage tanks by automatic methods - Part 6: Measurement of temperature in pressurized storage tanks (non-refrigerated) ISO 4268:2000 ISO 4269:2001 ISO 4512:2000 ISO 5024:1999 Petroleum and liquid petroleum products - Temperature measurements - Manual methods Petroleum and liquid petroleum products - Tank calibration by liquid measurement; Incremental method using volumetric meters Petroleum and liquid petroleum products Equipment for measurement of liquid levels in storage tanks; Manual method. Petroleum liquids and liquefied petroleum gases Measurement; Standard reference conditions ISO/TR 7507-1:2003 Petroleum and liquid petroleum products -- Calibration of vertical cylindrical tanks; Part 1: Strapping method ISO/TR 7507-2:2005 Petroleum and liquid petroleum products -- Calibration of vertical cylindrical tanks; Part 2: Optical-reference-line method ISO/TR 7507-3:2006 Petroleum and liquid petroleum products -- Calibration of vertical cylindrical tanks; Part 3: Optical-triangulation method ISO/TR 7507-4:1995 Petroleum and liquid petroleum products -- Calibration of vertical cylindrical tanks; Part 4: Internal electro-optical distance-ranging method ISO/TR 7507-5:2000 Petroleum and liquid petroleum products -- Calibration of vertical cylindrical tanks; Part 5: External electro-optical distance-ranging method ISO/TR 7507-6:1997 Petroleum and liquid petroleum products -- Calibration of vertical cylindrical tanks -- Part 6: Recommendations for monitoring, checking and verification of tank calibration and capacity table ISO 8222:2002 ISO 9770:1989 Petroleum measurement systems -- Calibration -- Temperature corrections for use when calibrating volumetric proving tanks Crude petroleum and petroleum products Compressibility factors for hydrocarbons in the range 638 Kg/m3 to 1,074 kg/m3 7
ISO 11223:2004 ISO 11223-1:1995 ISO 12917-1:2002 ISO 12917-2:2002 Petroleum and liquid petroleum products -- Direct static measurements Measurement of contents of vertical storage tanks by hydrostatic tank gauging Petroleum and liquid petroleum products -- Direct static measurements -- Contents of vertical storage tanks -- Part 1: Mass measurement by hydrostatic tank gauging; Revision 3, 5/19/03 WITHDRAWN Petroleum and liquid petroleum products Calibration of horizontal cylinder tanks; Part 1: Manual methods Petroleum and liquid petroleum products Calibration of horizontal cylinder tanks; Part 2: Internal electro-optical distance ranging method ISO 15169:2003 Petroleum and liquid petroleum products Determination of volume, density and mass of the hydrocarbon content of vertical cylindrical tanks by Hybrid tank measurement systems. Reference: British Standards BS 7849 P1 Petroleum and Petroleum Products Direct Static Measurements; Contents of vertical storage tanks, Part 1 Mass Measurement by Hydrostatic Tank Gauging. Revision 1996 Reference: Organisation Internationale de Metrologie Legale (OIML) (Organization International of Metrology Legal) R 85 - EN Automatic level gauges for measuring the level of liquid in fixed storage tanks 1998 R 117 - EN Measuring systems for liquids other than water 1995 R 125 - EN Measuring systems for the mass of liquids in tanks 1998 NOTE: OIML has yet to adopt a standard for Hybrid measurement of liquids in fixed storage tanks. API, ISO, GOST, BS and others have adopted Hybrid and Hydrostatic as the two methods for volumetric measurement. Everyone else in the world recognizes that volume is not determined by level alone. The standards and publications listed are available through the organization referenced; American Petroleum Institute (API), ASTM International, International Standards Organization (ISO), and the International Organization of Legal Metrology (OIML). If you have trouble finding these standards, contact Gauging Systems Inc. (GSI). 8
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