scope:

This standard covers the design, construction, and location of liquefied petroleum gas (LPG) installations at marine and pipeline terminals, natural gas processing plants, refineries, petrochemical plants, and tank farms. This standard covers storage vessels, loading and unloading systems, piping, or related equipment.

The size and type of the installation; the related facilities on the site; the commercial, industrial, and residential population density in the surrounding area; the terrain and climate conditions; and the type of LPG handled shall be considered. Generally speaking, the larger the installation and the greater the population density of the surrounding area, the more stringent are the design requirements.

Design and construction considerations peculiar to refrigerated storage, including autorefrigerated storage are covered in Section 9 of this standard.

In this standard, numerical values are presented with U.S. customary units only. These U.S. customary values are to be regarded as the standard values.

This standard shall not apply to the design, construction, or relocation of frozen earth pits, underground storage caverns or wells, underground or mounded storage tanks, and aboveground concrete storage tanks.

This standard does not apply the following installations:

a. Those covered by API Standard 2508.

b. Those covered by NFPA 58 and NFPA 59.

c. U.S. Department of Transportation (DOT) containers.

d. Gas utility company facilities; refinery equipment; gas processing equipment; and transfer systems from process equipment before LPG storage.

e. Those tanks with less than 2000 gallons of storage capacity.