AWWA F102:2019 pdf download.Matched-Die-Molded, Fiberglass- Reinforced Plastic Weir Plates, Scum Baffles, and Mounting Brackets
This standard describes the minimum requirements for fiberglass- reinforced plastic weir plates, scum baffles, mounting brackets, lap plates, cover washers, and weir pans, fabricated with the matched-die molding process. Included are requirements for design, construction, dimensions, tolerances, physical properties, work quality, appearance, and installation. This standard contains the requirements for using general-purpose and chemical-resistant resins. These fabrications are generally used in municipal water supply service and industrial water supply service applications.
1.1.1 Exceptions. This standard does not cover weir plates, scum baffles, mounting brackets, lap plates, and cover washers fabricated with the hand layup, sprayup, or flat-sheet machine -cut method.
1.1.2 Classification. Resistance to the corrosive or chemical environment shall be determined prior to molding either Type I or Type II fabrications. Typically, municipal water supply service applications use Type I, and industrial water supply service applications may use either Type I or Type II, depending on the condition of the environment. Weir plates, baffles, and brackets shall be classified according to type as follows
4.3.3 Finish and appearance. The surface finish of fiberglass components manufactured in accordance with this standard shall be smooth and resin-rich. The flat surfaces and edges shall be free from porosity, voids, or dry glass. The surfaces and edges must be resin- rich to achieve the maximum resistance to corrosion and weathering. Parts manufactured with porosity, voids, dry glass, or delamination shall be rejected. Repair of cosmetic defects shall be acceptable if performed in a neat manner and blended smooth. Table 2 lists allowable cosmetic defects.
4.4.1 Chemical resistance. Chemical resistance of the resin shall be determined using ASTM C581. The reinforcing materials prescribed in the test laminate are only for the purpose of establishing a uniform basis for comparison; they do not necessarily represent the preferred materials for the particular environment. This procedure may be adapted to test or evaluate components, composition or fabrication variations, and production samples.
4.4.2 Minimum pbysical requirements. Laminates shall meet the minimum physical properties listed in Table 1. .AWWA F102 pdf download.