Pipelife 2835529 is a corrugated polypropylene double-wall formwork pipe with 888 mm outer diameter and 800 mm inner diameter, 6 m long, ring stiffness class SN8, in black. The pipe serves as permanent formwork for cast-in-place concrete foundation columns and shafts, with tube-end connections on both ends. Typical application is column-foundation forming for large-diameter concrete piers and shaft construction.