This standard covers the level measurement of liquid hydrocarbons in stationary, aboveground, atmospheric storage tanks using automatic tank gauges (ATGs). The standard discusses automatic tank gauging in general, accuracy, installation, commissioning, calibration, and verification of ATGs that measure either innage or ullage. It covers both intrusive and non-intrusive ATGs used for either custody transfer or inventory control. The standard also covers the requirements for data collection, transmission, and receiving.

This standard does not cover the following:

a) Hydrocarbons having a Reid vapor pressure above 15 pounds per square inch (in.) absolute (100 kPa).

b) Measurement of weight or mass with ATG equipment. This is covered in Chapter 3.6 and Chapter 16.2 of the Manual of Petroleum Measurement Standards.

c) Measurement of the level in underground tanks or in pressurized tanks storing liquid hydrocarbons.

d) Conversion of the tank level to liquid volume this is covered in Chapter 12.1 of the Manual of Petroleum Measurement Standards.

e) Measurement of temperature, sampling, density, and sediment and water (S and W), which are discussed in Chapters 7–10 of the Manual of Petroleum                 Measurement Standards.

Safety and material compatibility precautions should be taken when using ATG equipment. Manufacturers’ recommendations on the use and installation of the equipment should be followed. Users should comply with all applicable codes and regulations, API standards, and the NFPA National Electrical Code.

 This standard is available for purchase at the API Publication Store: https://www.apiwebstore.org/standards/3_1B

• Year of Declaration: 2018
• Reference: API Manual of Petroleum Measurement Standards (MPMS) Chapter 3.1B
• Number of Pages: 19
• Code: GYS API MPMS CHAPTER 3-1
• Version: Third Edition
• ICS Number: