API Publ 2510A-2010 pdf free download
API Publ 2510A-2010 pdf free download.Fire-Protection Considerations for the Design and Operation of Liquefied Petroleum Gas (LPG) Storage Facilities.
f. Pure LPG is noncorrosive to steel and generally noncorro- sive to copper alloys. However, when sulfur compounds and other impurities are present in the LPG, corrosion can be a serious problem. g. LiqueÞed petroleum gas has no lubricating properties, and this fact must be taken into account when specifying LPG- handling pumps, compressors, and so forth. h. LiqueÞed petroleum gas is colorless. However, when the liquid evaporates, the cooling effect on the surrounding air causes condensation of water vapor in the air, which usually makes it possible to see an escape of LPG. This may not occur in the case of a vapor release if the vapor is near ambi- ent temperature and its pressure is relatively low. i. Pure LPG is practically odorless. For safety purposes, it is required that an odorizing agent (such as ethyl mercaptan) be added to commercial grades of LPG to make them detectable by smell. 1.7 Definitions Terms used in this publication are deÞned in 1.7.1 through 1.7.19. 1.7.1 adiabatic: A closed thermodynamic system in which changes take place with no net gain or loss of energy. 1.7.2 autorefrigeration: The chilling effect from vaporization of LPG when it is released or vented to a lower pressure. 1.7.3 boiling liquid-expanding vapor explosion (BLEVE): A phenomenon that occurs when an LPG vessel fails catastrophically releasing its contents. The most com- mon cause of a BLEVE of a LPG vessel is prolonged, direct exposure to a Þre with ßame contact above the liquid level. A BLEVE can occur when a vessel containing a liquid fails with the liquid at a temperature above the boiling point of its components at atmospheric pressure. 1.7.4 excess flow valve: A device designed to close when the ßow rate of the liquid or vapor passing through it exceeds a prescribed value as determined by pressure drop.
2.1 Introduction Adherence to the design considerations and requirements of this section will signiÞcantly reduce Þre risk at LPG facili- ties and will limit the spread of Þre and extent of damage should a Þre occur. This section is intended to be used as a supplement to API Standard 2510. 2.2 Site Selection 2.2.1 LiqueÞed petroleum gas storage facilities should be located to minimize the exposure risk to adjacent facilities, properties, or population. The location, layout, and arrange- ment of a storage facility should be based primarily on the requirement for safe and efÞcient operation in normal use. Recognition of safety requirements in plant layout and equipment spacing is essential in the early design of new facilities and has a direct impact on both the risk and the potential magnitude of loss. Typical considerations are listed in 3.1 of API Standard 2510. 2.2.2 For remotely located storage facilities, such as those in producing areas or at facilities where the quantity of stored LPG is limited, the amount of built-in Þre protection warranted may be less than that needed for larger facilities located in populated or developed industrial areas. Thus, the remoteness of the location is a major factor in determin- ing the degree of Þre protection to be included in the design. A safety analysis, discussed in 1.5, can help to establish a realistic exposure risk to aid in deciding on the amount of protection necessary. 2.2.3 Risk assessment and dispersion modeling can be use- ful tools in estimating setback distances to limit exposure to adjacent facilities. 8 For additional information, see the API report Validation of Heavy Gas Dispersion Models with Experimental Results of the Thorney Island Trials June 1986, Volumes I and II.
