Water & Wastewater

Clean water is not abrasive — but almost nothing in a treatment works is clean water. Grit, sand, lime slurry, sludge and screened screenings are all abrasive, and they are usually moving in a chemically aggressive environment that rules out plain steel. Alumina handles both at once.

How wear actually happens

• Grit and sludge lines. Sand and grit in suspension wear through steel elbows first, then fail the whole run.
• Lime and chemical dosing. Lime slurry is abrasive and alkaline; dosing lines fail at bends and at reducers.
• Aeration and mixing. Abrasive solids plus continuous operation, in equipment that is expensive to take out of service.
• Filtration media. Ceramic elements give precise pore control and survive backwashing and chemical cleaning.
• Desalination and brine. Highly corrosive, often hot, with suspended solids in pretreatment stages.

What we normally supply

• AL-99 ceramic-lined pipe, elbows and tees, DN50–DN600
• Porous ceramic discs, plates and tubes for filtration and aeration
• Alumina tiles for channel and tank linings where grit concentrates
• AL-99 grinding media for lime slaking and reagent milling
• Precision ceramic valve and pump wear parts to drawing
• Custom linings for screens and grit classifiers

Typical grade and thickness

Starting points, not rules. The right specification depends on particle size, velocity and impact angle — send us the application and we will size it properly.