![]() Providing fresh air inside a tank to maintain an atmosphere within acceptable permit limits and provide therequired number of air changes per hour. Vapor freeingThe removal of flammable or toxic vapors from a tank by displacement or the reduction of the percentage ofvapors in the tank to a safe level by dilution with fresh air. Upper explosive(flammable) limit (UEL):The maximum concentration expressed as a volume (percentage) of a vapor-in-air above which propagation offlame does not occur upon contact with an ignition source generally considered “too rich to burn. Undesirable materials that accumulate in the bottom of underground tanks and are removed for disposal, usuallyconsisting of heavy petroleum products or a mixture of hydrocarbons, residue, and water, that may be flammable.hazardous,and/or toxic.Īny vessel having a liquid capacity that exceeds 60 gal (230 L), is intended for fixed installation, and is not usedfor processing.Ī tank and any underground piping connected to the tank that has at least 10 % of its combined volume PurgingThe process of adding an inert gas to a combustible mixture to reduce the concentration of oxygen below theminimum oxygen content (MOC). The minimum concentration expressed as a volume (percentage) of a vapor-in-air below which propagation offlame does not occur on contact with an ignition source generally considered to be “too lean to burn.”ģ.12petroleum-contaminated soilAny earthen material or artificial fill that has human or natural alteration of its physical, chemical, biological, oiradiological integrity resulting from the introduction of crude oil, or any fraction or derivative thereof (such asgasoline, diesel, or motor oil). API 1604-2021 pdf download Closure of Underground Petroleum Storage TanksĪny work that has the potential to produce enough thermal energy to provide an ignition source in an area wherea potential exists for a flammable gas or vapor in-air atmosphere in the explosive (flammable) range to occur.such as drilling, grinding, cutting, abrasive blast cleaning, etc.Ī technique by which the atmosphere in a tank or container is rendered nonignitable or nonreactive by theaddition of an inert gas.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |