Orenco ® Fiberglass Basins
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Orenco Product Specifications Orenco Fiberglass Basins ® Orenco Systems® Incorporated For Applications Including Pump Basins, Lift Stations, and Wet Wells 1.0 SCOPE These specifications describe applicable standards, materials, construction, configurations, and options for Orenco® Fiberglass Basins, as manufactured by Orenco Systems, Inc., 814 Airway Avenue, Sutherlin, Oregon 97479. 2.0 GENERAL Orenco Fiberglass Basins are filament-wound fiberglass structures with a gelcoated external surface, manufactured in the following standard inside nominal diameters: 24" (600-mm) Orenco Fiberglass Basins are available to a maximum height of 35 feet (10.6 meters). 2.1 Standards Basins manufactured to this specification shall conform to the standards below as applicable. ASTM D 3753: Standard Specification for Glass-Fiber-Reinforced Polyester Manholes and Wetwells ASTM C 581: Standard Practice for Determining Chemical Resistance of Thermosetting Resins Used in Glass-Fiber-Reinforced Structures Intended for Liquid Service ASTM D 2584: Standard Test Method for Ignition Loss of Cured Reinforced Resins ASTM D 790: Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials ASTM D 2583: Standard Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impressor ASTM D 2563: Standard Practice for Classifying Visual Defects in Glass-Reinforced Plastic Laminate Parts 2.2 Drawings Manufacturer shall provide detailed basin drawings, including nominal dimensions, volumes, and materials of construction. 3.0 MATERIALS AND FABRICATION 3.1 Materials Basin shall be manufactured from fiberglass reinforced polyester resin, using grades of resin and fiberglass considered acceptable for use in water and wastewater environments. Resin fillers shall not be used. The reinforcing materials shall be commercial grade of E-type glass fibers in the form of mat, continuous roving, chopped roving, or roving fabric, having a coupling agent that will provide a suitable bond between the glass reinforcement and the resin. 3.2 Fabrication: Shell Wall Vertical shell walls shall be manufactured using a helical winding process. The interior surface shall be a resin rich layer of fiberglass or organic surface veil. The surface shall be free of crazing, delamination, blisters larger in diameter than ½-inch (12.7-mm), and wrinkles of 1/8-inch (3.18-mm) or greater in depth. The exterior surface shall be free of blisters larger in diameter than ½-inch (12.7-mm) and any delamination. To provide the required strength, the shell wall thickness shall vary with the basin height. 3.3 Fabrication: Basin Bottom and Top Flange The base and top flange shall be molded using RTM, vacuum-bagging, or other closed-molded process. Base and top flange shall be bonded to Basin with a suitable structural adhesive or with polyester resin and glass fiber reinforcement. The base shall be manufactured with an integrally molded anti-flotation flange whose outside diameter is a minimum of 6 inches (152 mm) larger than the diameter of the shell wall. The top flange shall be a minimum of 3 inches (76.2 mm) wide and include threaded inserts or through-holes to accept the attachment of a basin cover.

Specifications: Orenco® Fiberglass Basins 3.4 Fabrication: Basin Covers 3.41: Fiberglass Cover The fiberglass cover shall be closed-molded. The cover shall attach to the flange with minimum 3/8-inch (9.53-mm) diameter, 300-series stainless steel bolts and include an elastomeric gasket to provide a watertight joint. 3.42: Aluminum or Steel Cover Commercially available hatch covers made of aluminum or steel may be specified in lieu of the fiberglass covers. 3.5 Penetrations All penetrations shall be watertight and not jeopardize the structural integrity of the basin. Fastener penetrations...