kyynelkanavaputken

Kyynelkanavaputken is a specialized pipe used in Finnish municipal water distribution and drainage systems. The name derives from the Finnish words kyynel ("tear") and kanava ("canal"), reflecting the pipe’s distinctive tear‑shaped cross‑section that optimises flow while reducing the pipe’s overall weight.

The typical construction of a kyynelkanavaputken is a thin‑walled, steel or high‑density polyethylene tube crafted through extrusion. The tear‑shaped profile results from a moulded die that produces a curved outer wall and a flatter inner surface, mitigating internal pressure points common in round pipes. The material choice balances durability against corrosion resistance; steel versions are often galvanized or epoxy‑coated, whereas polyethylene variants are reinforced with glass fiber for high‑pressure applications.

In terms of technical performance, kyynelkanavaputken is available in diameters ranging from 38 mm to 150 mm, with wall thicknesses from 2.5 mm to 5.0 mm. The pipes support nominal pressures up to 11 bar for water distribution and can handle greater pressures when used in septic systems or industrial piping. Their tear‑shaped design also helps minimise the accumulation of solids in drainage contexts, making them suitable for sewage and stormwater channels.

The first commercial model of kyynelkanavaputken appeared in the late 1970s in the Finnish Finnpipe industry, and by the 1990s it had been adopted nationwide for cost‐effective installations in new urban developments. Because of its lower material usage and reduced installation time, it remains popular for both new infrastructure projects and retrofitting of older systems.

Kyynelkanavaputken illustrates the synergy of Finnish engineering with local linguistic heritage. It is referenced in a number of municipal codes and construction standards regarding water‑distribution and drainage within Finland.