... works: used as rain pipe of buildings, underground drainage pipe, blow-off pipe, vent pipe, etc.5. Dirty water collecting pipe in refuse landfills.6 ... with simple equipments, simply and speedily without leak while no machine is needed.5. Producing on the construction site, saving the ... the HDPE could be as long as 50 years. HDPE Corrugated Drainage Pipe With Steel Reinforced