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PolySpan Pipeline

Valley PolySpan Pipeline

In certain areas, some producers are using less desirable water sources, such as wastewater, process water, and even corrosive water. Other producers are adding crop protection chemicals or soil amendment products to their irrigation water. Under these conditions, corrosion of standard galvanized pipe may occur. Valley® PolySpan® irrigation poly pipes protect your irrigation pipelines from any corrosive components in your water, ensuring a long life for your machine.

Polyethylene liner: Prevents damage caused by acidic, corrosive or saline water
20/10 pipeline corrosion warranty: Unconditional replacement due to corrosion for the first 10 years or 30,000 hours, plus an additional 10 year pro-rated warranty
Robust design: Designed for agricultural, industrial and municipal water applications
Profit and productivity: Lets you take advantage of corrosive water, and allows chemigation and fertigation with aggressive chemicals
Sprinkler outlets: Full size ¾” dual-gasket, self-locking couplings for minimal pressure loss and no leaks
Versatility: Available for: 8000 series7000 series and re-piped 6000 series center pivots; Valley linearsValley Precision Corner®Valley VFlex CornerBender30
polyspan chart
valley polyspan pipeline for corrosive water conditions

Choose the Best Pipeline for Your Application

When water quality changes, we’ve seen aluminum, galvanized steel, weathering steel, and even stainless pipe corrode. PolySpan is completely resistant to these changes and protects the significant investment you’re making in an irrigation machine.

Other so-called corrosion resistant pipelines are sensitive to a number of corrosive elements commonly found in irrigation water. More importantly, some combinations of these elements will result in accelerated corrosion rates.

Weathering steel is only slightly more corrosion resistant in irrigation applications than plain carbon steel. It is sensitive to humid subtropical climates where the protective patina may never stabilize, so it continues to corrode. Painting reduces the corrosion resistance of weathering steel, as well. Even the smallest defect in the paint is an opportunity for corrosion failure.

Stainless steel is sensitive to levels of chlorides above 40 ppm and sulfates greater than 100 ppm. It is also sensitive to highly basic or acidic water (pH greater than 11 or less than 4). It is not recommended for soft water and can be incompatible with certain farm chemicals, such as soil remediation products.

Aluminum is sensitive to levels of chlorides and sulfates above 50 ppm, pH greater than 8.2 or less than 5.0, crop production chemicals containing high levels of sulfur or copper, fertigation products such as phosphoric acid, and soil remediation products using sulfuric acid.