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API std 2510-2001 pdf free download

API std 2510-2001 pdf free download.Design and Construction of LPG Installations.
4 Design of LPG Vessels 4.1 APPLICABLE DESIGN CONSTRUCTION CODES 4.1.1 Vessels shall meet the requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 or 2. 4.1.2 When complete rules for any speciÞc design are not given, the manufacturer, subject to the approval of the pur- chaser, shall provide a design as safe as would be provided in the currently applicable code listed in 4.1.1. 4.2 DESIGN PRESSURE AND TEMPERATURE 4.2.1 The design pressure of LPG vessels shall not be less than the vapor pressure of the stored product at the maximum product design temperature. The additional pressure resulting from the partial pressure of noncondensable gases in the vapor space and the hydrostatic head of the product at maximum Þll shall be considered. Ordinarily, the latter considerations and the performance speciÞcations of the relief valve require a dif- ferential between design pressure and maximum product vapor pressure that is adequate to allow blowdown of the pres- sure relief valve (see API RP 520). 4.2.2 Both a minimum design temperature and a maximum design temperature shall be speciÞed. In determining a maxi- mum design temperature, consideration shall be given to fac- tors such as ambient temperature, solar input, and product run down temperature. In determining a minimum design temper- ature, consideration shall be given to the factors noted in the preceding sentence as well as the autorefrigeration tempera- ture of the stored product when it ßashes to atmospheric pres- sure. ASME Section VIII, Division 1, has special rules for conditions where reduced temperature, as a result of autore- frigeration or ambient temperature, is caused by coincident with a reduction in pressure. In such case it is required to evaluate the material (by impact testing if necessary) at the temperature of the product corresponding to a pressure that stresses the vessel shell to approximately 10% of the ultimate tensile strength of the shell material.
4.4 MATERIALS OF CONSTRUCTION 4.4.1 All materials of construction shall meet the require- ments of Section II of the ASME Boiler and Pressure Vessel Code. 4.4.2 Low-melting-point materials of construction, such as aluminum and brass, shall not be used for LPG vessels. 4.5 VESSEL CONNECTIONS 4.5.1 The number of penetrations in any vessel shall be minimized, particulary those located below the working liq- uid level (i.e., below the vapor space). 4.5.2 Flange connections shall be a minimum of ASME Class 150. All Þttings shall be a minimum of NPS 3 Ú 4 . 4.5.3 Refer to Section 8 for piping requirements. 4.6 PREVIOUSLY CONSTRUCTED VESSELS API 510 shall be used where an existing vessel is to be relocated or reused in a new service. 5 Sitting Requirements and Spill Containment 5.1 SITING 5.1.1 General Site selection is meant to minimize the potential risk to adjacent property presented by the storage facility and the risk presented to the storage facility by a Þre or explosion on adjacent property. The following factors shall be consid- ered in site selection: a. Proximity to populated areas. b. Proximity to public ways. c. Risk from adjacent facilities. d. Storage quantities. e. Present and predicted development of adjacent properties. f. Topography of the site, including elevation and slope. g. Access for emergency response. h. Availability of needed utilities. i. Requirements for the receipt and shipment of products.
A more likely LPG incident, and in the context of this pub- lication a more relevant one, is leakage from piping or other components attached to or near the vessel followed by igni- tion, a ßash Þre or vapor cloud explosion, and a continuing pool Þre and pressure (torch) Þre. With the exception of spacing, the design features discussed in this standard are intended to prevent a major incident. Spacing is intended to minimize both the potential for small leak ignition and the exposure risk presented to adjacent vessels, equipment, or installations in case ignition occurs. Spacing is not intended to provide protection from a major incident. Safety analysis and dispersion modeling are useful tools in estimating setback distances to limit the exposure risk to adjacent facilities. 5.1.2 Minimum Distance Requirement The minimum horizontal distance between the shell of a pressurized LPG tank and the line of adjoining property that may be developed shall be as shown in Table 1. Where residences, public buildings, places of assembly, or industrial sites are located on adjacent property, greater dis- tances or other supplemental protection shall be provided.

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