API 12F-2019 pdf free download

API 12F-2019 pdf free download.Specification for Shop-welded Tanks for Storage of Production Liquids.
1 Scope 1.1 General 1.1.1 This specification covers material, design, fabrication, and testing requirements for new shop-fabricated vertical, cylindrical, aboveground, welded steel storage tanks in the standard sizes and capacities, and for internal pressures approximately atmospheric, given in Table 1 . 1.1.2 This specification is designed to provide the oil production industry with tanks of adequate safety and reasonable economy for use in the storage of crude petroleum and other liquids commonly handled and stored by the production segment of the industry. This specification is for the convenience of purchasers and manufacturers in ordering and fabricating tanks. 1.1.3 Only tanks built to the requirements stated in this specification may be identified as 1 2F tanks. Tanks built to dimensions other than listed in Table 1 are outside the scope of this specification. 1.1.4 This specification has requirements given in two alternate systems of units. The manufacturer shall comply with the US Customary (USC) units. The SI unit equivalent is provided for convenience. NOTE Per API document style, SI unit values appear first, followed by their USC equivalents in parentheses. 1.2 Compliance 1.2.1 The manufacturer is responsible for complying with all the provisions of this specification. The purchaser may make any investigation necessary to satisfy himself or herself of manufacturer compliance and may reject any material that does not comply with this specification. The purchaser may wish to avail himself or herself of this right and furnish their own inspection independently of any supervisory inspection furnished by the manufacturer. 1.2.2 This specification is not intended to cover storage tanks that are to be erected in areas subject to regulations more stringent than the requirements contained in this specification. When this document is specified for such tanks, it should be followed insofar as it does not conflict with regulatory requirements.
3 Terms and Definitions For the purposes of this document, the following definitions apply. 3.1 bottom shell course The shell course welded directly to the tank bottom. 3.2 butt joint A joint type in which the butting ends of one or more workpieces are aligned in approximately the same plane. 3.2.1 double-welded butt joint A joint between two abutting parts lying in approximately the same plane and welded from both sides. A joint with filler metal added from one side only is considered equivalent to a double-welded butt joint when means are provided for accomplishing complete penetration and reinforcement on both sides of the joint. 3.2.2 single-welded butt joint with backing A joint between two abutting parts lying in approximately the same plane and welded from one side only, with a backing strip, bar, or other suitable material. 3.3 design pressure The pressure/vacuum permitted in the tank during normal in-breathing and out-breathing of the tank in accordance with API 2000, Annex A. 3.4 fillet weld A weld of approximately triangular cross section joining two surfaces approximately at right angles to each other, as in a lap joint, tee joint, or corner joint.
3.5 full-fillet weld A fillet weld whose size is equal to the thickness of the thinner member joined. 3.6 groove weld A weld in a groove on a workpiece surface, between workpiece edges, between workpiece surfaces, or between workpiece edges and surfaces. NOTE Grooves may be square, V (single or double), or U (single or double). 3.7 maximum pressure The maximum internal pressure permitted in the tank, under the effects of loading and load combinations stated in Section 5. 3.8 maximum vacuum The maximum internal vacuum permitted in the tank, under the effects of loading and load combinations stated in Section 5. 3.9 operating pressure The pressure at which the tank operates without the overpressure protection devices opening. 3.10 remote location The location for a tank that is sufficiently distant from any occupied buildings and public areas so that hazards associated with exposure to an external tank fire (e.g. thermal radiation, projectiles, pool fire due to inventory release, etc.) cannot reach them. Public areas include those facilities not owned/operated as part of the tank operations, but rather in use by the general public, such as roads deeded, dedicated, or otherwise permanently appropriated to the public for public use, occupied buildings, or other public infrastructure. 3.11 self-anchored tank Tanks that use their self-weight and the stored product to resist overturning forces. 3.12 tack weld A weld made to hold parts of a weldment in proper alignment until the final welds are made. 3.13 throat The shortest distance between the weld root and the face of a fillet weld.