Max. Pressure for concrete pipes with rubber gasket joints 1

[Pulex]

I'm working in a water supply project with high pressure concrete pipes (up to 350kPA). Initially we thought about weldet joints but theres a fabricant who proposed a rubber gasket joint. The problem is that i think that this kind of joint is not recommendable for pressures above 190 or 200kPA. Anyone knows any Porject with such high pressures using rubber gasket joints or limitations?

 

[bimr]

Give Ameron a call, they have experience with these types of projects. Here is a contact: Henry H. Bardakjian, Chief Engineer, Ameron International, Water Transmission Group, 10681 Foothill Blvd, Suite 450, Rancho Cucamonga, CA 91730-3857

"A 36-inch (900 mm) diameter water transmission main for the City of Prescott, AZ was successfully tested to 500 psi pressure."

 

[rconner]

It sounds like you could be referring to a reinforced, non-cylinder pipe construction of some sort, with alleged maximum pressure capabilities e.g. per AWWA Manual M9 of about 55 psi (379kPa). If one is on the other hand looking for a concrete pressure pipe that would have a totally/allegedly impermeable wall and joining system, I believe it has generally been necessary to go to a cylinder pipe construction, normally with formed steel joint rings and some sort of “Carnegie”-type joints that have at least some credible history in pressure pipe construction. While no joining system, welded or otherwise, is problem-free, I believe the greatest vulnerability of concrete pressure pipes at substantial pressures is not necessarily the joints, but instead low actual safety factors and corrosion/embrittlement of small, very highly stressed wires not far from the outside surface of the pipes.