These requirements cover shop fabricated, aboveground atmospheric Protected Tanks intended for storage of stable flammable, or combustible liquids that have a specific gravity not greater than 1.0 and that are compatible with the material and construction of the tank.
These requirements do not cover Fire Resistant Tanks which are intended for installation and use in accordance with the Automotive and Marine Service Station Code, NFPA 30A. These tanks are covered in UL's Outline of Investigation for Fire Resistant Tanks for Flammable and Combustible Liquids, Subject 2080.
These tank constructions are intended to limit the heat transferred to the primary tank when the construction is exposed to a 2-hour hydrocarbon pool fire and are provided with protection from physical damage. Tanks appropriately identified by product markings provide additional protection for the primary tank against projectile impact and vehicle impact.
These tanks shall be provided with integral secondary containment intended to prevent any leakage from the primary tank from entering the environment.
Protected Tanks are intended for stationary installation and use in accordance with the Uniform Fire Code, published by the International Fire Code Institute; the Flammable and Combustible Liquids Code, NFPA 30; and the Automotive and Marine Service Station Code, NFPA 30A.
Tanks covered by these requirements are fabricated, inspected, and tested for leakage before shipment from the factory as completely assembled units.
These requirements and tests are not intended to determine a tank's acceptability for use after fire exposure, vehicle impact, or projectile impact.
These requirements do not address methods of anchoring which may be required to prevent uplift from flooding or movement due to wind or seismic forces.
These requirements do not address either the construction, or attachment means of ladders, stairs, runways, guardrails, platforms, or equipment supports.
A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this Standard, and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements to determine that the level of safety as originally anticipated by the intent of this Standard is maintained. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this Standard shall not be judged to comply with this Standard. Where appropriate, revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this Standard.