UL 142A-2021 pdf free download.Special Purpose Aboveground Tank for Specific Flammable or Combustible Liquids.
3 Glossary
3.1 For the purposes of this Standard the following definitions apply.
3.2 Aboveground Tank — A storage tank that is intended for installation above grade, at grade or below
grade without backfill.
3.3 Atmospheric Tank — A storage tank that has been designed to operate at pressures from minus 0.5
psig to 1.0 psig (minus 3.4 kPa to 6.9 kPa) at the top of the tank.
3.4 Diked Containment — A single wall construction with bottom, sides, and an open or closed top intended to provide secondary containment of aboveground tank(s). The dike area is capable of being monitored for leakage, but can’t be pressurized.
3.5 Diked Containment Tank (Dike Tank) — A primary or secondary containment tank within a steel open or closed dike intended to provide at least 110 percent spill containment of the primary tank(s). Open top dikes do not have covers to prevent precipitation or debris from entering the dike area. Closed top dikes have covers to resist precipitation or debris from entering the dike area.
3.6 Fuel — A flammable or combustible liquid which is commercially available as an energy source for spark ignition or compression ignition engines, generators. turbines, heaters, or similar equipment; and meet appropriate ASTM Fuel Specifications, such as:
a) Gasoline — General description of various Flammable Class I petroleum distillates and alcohol blends compliant with ASTM 04814 or ASTM D5798 in a range of ED to E83 typically used in spark ignition engines.
b) Diesel — General description of various Combustible Class II petroleum distillates and biodiesel blends compliant with ASTM D975 or ASTM D7467 in a range of BO to B20 typically used in compression ignition engines.
C) Fuel Oil!Heating Oil — General description of various Combustible Class II petroleum distillates and biodiesel compliant with ASTM D396 in a range of B0-B5 typically used in heating equipment.
d) Kerosene — General description of various Combustible Class II petroleum distillates compliant with ASTM D3699 typically used in cooking, heating, lighting or similar equipment.
e) Turbine Oil General descnption of various Combustible Class II petroleum distillates compliant with ASTM D2880 typically used in turbine type engines or generators.
3.7 General Purpose Tank — A steel aboveground tank type covered by the requirements of UL 142, which are intended for a broad range of applications for storage of flammable and combustible liquids.
3.8 Interstitial Space (Interstice) — A space between the walls of a multiple wall tank that is capable of communicating fluid from a leak in an adjacent wall to a collection point for monitoring.UL 142A pdf download.