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Stainless Steel Parshall Flumes
Stainless Steel Parshall Flumes are an attractive option when standard fiberglass construction doesn't meet an application's needs. Stainless steel Parshall Flumes from Openchannelflow are available in both T-304L and T-316L.
Stainless Steel Advantages
Stainless Steel Parshall Flumes are:
- Corrosion-resistant
- High temperature resistant
- Economical (when compared to fiberglass ones made from specialty resins)
- Abrasion / damage resistant (particularly at thicker gauge construction)
- Have tight dimensional tolerances
- and are available with a range of accessories and mounting / end configuration options
Contact Openchannelflow for additional details.
2 Methods of Keeping Parshall Flumes Free of Algae
For a Flume to operate accurately, the flow surfaces must be kept free of debris and biological growth. In surface water applications, the growth of algae can present a considerable problem in trying to keep the flume clean.
Turbulent Flow and Parshall Flumes
One of the requirements of accurate flow measurement with a Parshall flume is a tranquil flow approaching the flume. Poorly balanced, surging, or turbulent flows will adversly affect the systems accuracy for both instantaneous and totalized flow.
Calculating Head Loss in Parshall Flumes
Parshall flumes – like all flumes - are obstructions placed in a flow stream that produce backwater. This backwater extends upstream of the flume and raises the water surface in the approach channel. The difference in water surface elevation with and without the…
Parshall Flumes for Industrial Pretreatment Discharges
The Parshall flume is the most common type of flume used for monitoring industrial discharges. The ubiquity of the Parshall flume means that it is usually well understood by pretreatment inspectors and industrial users alike – not an insignificant consideration…
Available in two grades, stainless steel Parshall Flumes provide excellent resistance to corrosive acidic / basic flow streams - particularly useful in acid mine discharge and landfill leachate applications.
Stainless steel construction also eliminates the concerns typical with fiberglass flumes - flow streams with sustained peak temperatures above 140 ºF [60 ºC] where exotic (and expensive) resin systems would be necessary.
The heavy gauge construction of Openchannelflow stainless steel Parshall Flumes provides the greatest resistance to abrasion and damage resistance of any flume material. This resistance is advantageous in applications where the flow stream contains sands, gravel, stones, or where the flume is subject to potential abuse - vandalism, cattle, etc.
Stainless steel Parshall Flumes can also be used where channel banks may experience periodic burn-backs.
While stainless steel Parshall Flumes do cost more than standard polyester resin fiberglass ones, they are often more cost-competitive than fiberglass in applications where polyester resins are not suitable.
Skilled metal fabrication can result in stainless steel Parshall Flumes that exhibit the same dimensional tolerance as fiberglass flumes.
For Openchannelflow stainless steel Parshall flumes, the following dimensional tolerances are typical:
- 1/8-inch [3.18 mm] (12-inch or smaller Parshall Flumes)
- 1/4-inch [6.3518 mm] (18-96 Parshall Flumes)
- 1/2-inch [12.7 mm] (120-144-inch Parshall Flumes)
The above dimensions are within the +/-2% of nominal required by ASTM D1941-91(2013) Standard Test Method for Open Channel Flow Measurement of Water with the Parshall Flumes.
While not as many accessories or mounting / end configuration options are available for stainless steel Parshall Flumes, Openchannelflow still offers a considerable range.
LOCATIONS IN ATLANTA, GA & BOISE, ID