API Spec 12P-2016 pdf free download

API Spec 12P-2016 pdf free download.Specification for Fiberglass Reinforced Plastic Tanks.
1 Scope 1.1 General This specification covers material, design, fabrication, and testing requirements for fiberglass-reinforced plastic (FRP) tanks. Only shop-fabricated, vertical, cylindrical tanks are covered. Tanks covered by this specification are intended for aboveground and atmospheric pressure service. Unsupported cone bottom tanks are outside the scope of this specification. This specification is designed to provide the petroleum industry with various standard sizes of FRP tanks. Because of the versatility of FRP tanks, the user shall be responsible for determining the suitability of FRP tanks for the intended service. NOTE The consequences of exposing FRP tanks to high temperatures created by exposure fires should be considered. This material loses strength as the temperature increases. FRP tanks should be suitably protected against fire exposure or so located that any spills resulting from the failure of these materials could not unduly expose persons, buildings, structures, or other equipment to the possible fire incident. 1.2 Compliance 1.2.1 The manufacturer is responsible for complying with all of the provisions of this specification. The purchaser is responsible defining their specific requirements in the Data Sheet. The purchaser may make any investigation necessary to be satisfied with compliance by the manufacturer and may reject any material that does not comply with this specification. NOTE The purchaser is encouraged to arrange for inspection independent of the inspection furnished by the manufacturer, and the purchaser’s inspector should follow closely all the details of shop fabrication and testing herein specified that affect the integrity and safety of the completed structure. 1.2.2 If specified by the purchaser on the Data Sheet, the tank shall be constructed in accordance with API Q1 and the API Monogram Program (see Annex A). 1.2.3 This specification applies to new tanks. The requirements may be applied to existing tanks at the discretion of the owner/operator.
3 Terms and Definitions For the purposes of this document, the following definitions apply. 3.1 chop-hoop A unique blend of chop-spray and filament winding. The FRP composite is constructed using the chop-spray and the filament winding processes simultaneously. This process gives the strength from the directional glass from the filament winding process plus the higher resin content from the chop-spray process, which provides improved corrosion protection to the reinforcement. 3.2 chop-spray Continuous strand glass roving and catalyzed resin are fed through a chopper gun, which cuts the fiberglass into specific lengths that can be adjusted on site. The chopper gun deposits the resin-saturated “chop” on the mold. The laminate is then rolled to thoroughly saturate the glass strands and compact the chop. Additional layers of chop laminate are added as required for thickness. 3.3 design thickness The thickness necessary to satisfy tension and compression strength requirements by this Specification or, in the absence of such expressions, by good and acceptable engineering practice for specified design conditions, without regard to construction limitations or corrosion allowances. 3.4 fiberglass-reinforced plastic (FRP) A fiber-reinforced plastic composite which is a combination of a polymer matrix resin, referred to as plastic, (thermoset resin such as polyester, isopolyester, vinyl ester, epoxy, phenolic) and fiber reinforcement such as glass, carbon, aramid or other reinforcing material. 3.5 filament wound Filament winding is an automated open molding process that uses a rotating mandrel as the mold. The male mold configuration produces a finished inner surface and a laminate surface on the outside diameter of the product. Filament winding results in a high degree of fiber loading, which provides high tensile strengths in the manufacture of hollow, generally cylindrical products such as chemical and fuel storage tanks, pipes, stacks, and pressure vessels.