industrial & municipal fiberglass fabrication

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Glass•Steel®, Inc. fiberglass fabrication

For a printable PDF version click the file below:

Fiberglass composite construction
Polymer concrete core
1½" total wall thickness
Manufactured to standard Parshall dimensions
Built-in flow measurement gauges
No internal stiffeners or braces required
Mounting options available for ultrasonic sensors + other flow-measuring devices
Multiple throat sizes available

FLUME DIMENSIONS

Spago®, Inc. Parshall Flumes are constructed from a fiberglass composite constructed of two fiberglass skins with a polymer concrete core. All Spago®, Inc. flumes have a total wall thickness of 1 ½”. Due to the high moment of inertia of the wall due to the thickness, no stiffeners or other braces are required. The superior strength of the sandwich panel construction allow the flume to act as the concrete form as the concrete trench wall are cast with no need for any internal bracing. All Parshall Flumes are made to same dimensions established by Dr. Ralph L. Parshall in 1922 and are shown in attached table #1 plus drawings #1 & #2. Spago®, Inc. Parshall Flumes come standard with two built in gauges. The first gauge is set at a distance of 2/3 of the wall length of the approach side of the flume as measured from the start of the flume throat toward the inbound flow. This first gauge is for measuring the flow into the system. The second gauge is set at a point 2” back from the downstream edge of the throat of the flume. This gauge allows a quick visual check for determining whether the flow is in free flow or submerged flow. Table #2 indicates the flow rate in cubic feet per second under free flow conditions as well as the maximum height at gauge to as compared to the gauge #1 reading for free flow to exist. If the water level at gauge #2 is higher than indicated the incoming water in a submerged flow condition and the chart will have to be adjusted to accommodate that flow. Spago®, Inc. can also supply threaded inserts or mounting brackets for installing ultra sonic sensors or other flow measuring devices as required.

Frequently Asked Questions

SPAGCO, Inc. fiberglass Parshall flume for open-channel water and wastewater flow measurement

Fiberglass Parshall Flumes Technical Brochure

Need a Fiberglass Parshall Flume for Your Project?

Physical Properties

What is a Parshall flume used for?

A Parshall flume is used to measure flow through open channels in water and wastewater applications.

What are SPAGCO, Inc. Parshall flumes made from?

SPAGCO, Inc. Parshall flumes are constructed with fiberglass composite skins and a polymer concrete core.

What sizes of fiberglass Parshall flumes are available?

SPAGCO, Inc. offers fiberglass Parshall flumes in multiple throat sizes. Refer to the technical brochure for available dimensions and configuration information.

Do SPAGCO Parshall flumes include flow measurement gauges?

Yes. SPAGCO Parshall flumes are supplied with two built-in gauges used to assist with flow measurement and to help determine free-flow or submerged-flow conditions.

Can flow-measuring equipment be mounted to the flume?

Yes. SPAGCO, Inc. can supply threaded inserts or mounting brackets for ultrasonic sensors or other flow-measuring devices as required.

Additional FLow Chart is shown on the PDF below

ENGINEERED

FIBERGLASS

SOLUTIONS

Contact Spago®, Inc., a sister company to Glass-Steel®, Inc., to discuss your flow measurement requirements, available sizes and project specifications.

Parshall Flume Features + Specifications

Vertically Cantilever Beam-Fixed one end

Spagco Flume Brochure

CONTACT

Fiberglass Parshall flume manufactured by SPAGCO, Inc. for water and wastewater flow measurement

The dashed line in the above diagram indicates typical water flow profile for free flow

Tensile Strength                                                          8,700psimin ASTM D638
Flexural Strength                                                        18,000psi min ASTM D790 Flexural Modulus                                                                       1.0 x 106psi min ASTM D790
Compressive Strength                                                11,000psi min ASTM D695
Average Coefficient of Thermal Expansion               10.5 x 10-6 ASTM D696
Water Absorption % 24 hours                                   .10% ASTM D570

Height of 1-1/2" flume wall is 36" inside depth per the following formula.

Parshall Flumes by SPAGCO®, INC. Spago®, Inc., a sister company to Glass-Steel®, Inc., fabricates fiberglass Parshall flumes for water and wastewater flow measurement applications. Flumes are constructed using fiberglass composite materials and are fabricated to standard Parshall dimensions.

Spago®, Inc. fiberglass Parshall flumes feature a composite construction consisting of fiberglass skins with a polymer concrete core. The structural design provides rigidity without the need for internal stiffeners or braces.

Spago®, Inc. Parshall Flumes For Water, Wastewater, and Industrial Applications