Plastic Laminate: Polyester resin reinforced with fiberglass
Tensile strength at break: 15,000 PSI min, ASTM D638*
Flexural strength: 25,000 PSI min, ASTM D790*
Tangent modulus of
elasticity: 1,000,000 PSI min, ASTM D790*
Glass Content: 30% minimum
All Surfaces: Sealed with 15 mils of smooth white gel coat
Concrete Anchor Clips
(optional): Fiberglass
Stilling Wells (optional): Same as flume
Bubbler Tube (optional): Type 304 Stainless Steel
Staff Gages (optional): White with black markings; graduated in feet and tenths of feet. lntegrally molded
in flume wall.
* 1 14" flat bar stock
Wall Thicknesses:
Flume Size Thickness
1" - 9" 3/16"
12" - 24" 1/4"
36" - 96" 3/8"
Flumes shall be supplied with integral Foam Reinforcing Ribs and Top
Stiffener Angles as required by Flume size.
The Parshall flume is intended for use in open channels such as irrigation ditches. Use extreme care when adapting Parshall flumes for use with round pipes. The flume's crest is usually set at an elevation higher than the floor of the upstream channel. A variety of factors influence the selection of the crest elevation. When designing a metering station it is best to follow the recommendations of a knowledgeable professional in the field.
Parshall flumes may be set in earth or concrete or bolted to companion structures using the 2-inch flange provided on each end. When pouring concrete it is advisable to brace the flume internally with 2" x 4" blocks cut to size. This temporary bracing will prevent bulging of the sidewalls. Remove the braces after the concrete has set.
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