SDR17 poly sweep bends offer substantial advantages to pipeline designers looking for improved flows. Poly Sweep bends are manufactured from HDPE pipe and are made with both a constant radius and a consistent diameter. Radius options start at R=1.5D and go through to R=3D. Angle options are technically infinite, however common angles in Poly Sweep Bends are 10º, 15º, 22.5º, 30º, 45º, 60º and 90.