--- In [email protected], Eilrem Fernandez <[EMAIL PROTECTED]> wrote: > GI pipes are mild steel pipe coated with zinc, while BI means black iron or uncoated mild steel pipe. High pressure PVC pipes are usually rated at 100psi, equivalent to a maximum of 70m head. However, this just left you a small factor of safety. An accidental blockage of the nozzle or too rapid closure could cause the pipes to burst. >
He should be alright with 4" Sched. 40 PVC (NOT cell-core) and pressure fittings. ASTM D1785 "Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120" indidcated a maximum working pressure of 133psi with a burst pressure of 700 psi. Keep in mind that UV exposure will cause the pipe to become more brittle over time. ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
