6" IPS SCH 40 PVC PIPE

what is the purpose of the pipe, gas,water, other? Could use medium density polyproplyene.

Good morning, Guest. I'm sorry, I should've included that info. It is a potable domestic water distribution line.

Yes, my choice was to use HDPE due to the great flexibility in installing in the short radius curves in the road, but the owner of the source pipeline insists on PVC. His preference overrides any other considerations, because if we don't, then we have to install a meter and checkvalve, and my client becomes an owner-operator-meter reader-bill collector, which my client does not want. Whereas, if we build it with PVC, then my client gives it to him, and avoids the previous mentioned responsibilities.

If the PVC pipe you use incorporates bell & spigot couplings you might be able to take advantage of the alignment tolerance of these couplings to make large sweeping bends. Putting a lot of 90º els in the line is going to jack up up your head loss. Look at Blue Brute or eaqual for this.

Good morning, Guest. Thx for your response. I looked at Blue Brute and it seemed to me they only offer metric sizes, but the main thing is, this proposed main is going in a mountainous road, with several short radius curves; which need extreme measures. I do not believe the slight angularity allowed by the o-ring joints of the bell and spigot design would accomodate such a turn.

Most manufacturers of PVC schedule 40 pipe make 22½º and 11¼º bends as well as the 90º and 45º bends. This allows for more combinations to make the sharper turns you have. Friction loss, as stated by others, is a consideration, but given the task at hand, that can be a seconsary consideration that is a requirement to effect the installaiton. I would be more concerned with the added labor to glue these additional bends together to make the turn radius required. Again, if that is the only way to make it happen, then it is the best way.

www.plumbingsupply.com has the fittings in 90,45,22.5 and 11.25 angles. I thought I sent this out last night, must be stuck in my USB port. Good luck.

Good morning, bob c. Thx for the input. Altho that is an extremely good website, they did not list any 6" 22-1/2º, nor 11-1/4º els, no 6" Y's, nor any 6"x1" saddle tapping tees. I sent them an inquiry about their availability.

This could be my ignorance talking, I used to be an electrician's helper for a summer job when I was in college and we bent the PVC we were using for conduit underground by heating it up until it was pliable and then we fit it into the curve we were trying to make. I'm not sure you could do that with a pressure-containing pipe, but thought I would throw it out there...

Good morning, betomachine. Thx for the comment. I think you're correct, heat-bending would be ok for non-pressure applications, but not for pressure.

Lasco makes a 22-1/2 elbow in pressure. You may want to look at a product called Straub couplings. These couplings allow for a 5 degree offset which may give provide the bends you require without friction loss. www.straub.ch

Good morning, roadapple (like that name!), thx for the note, I have an email into Lasco; their website seems to be a hodgepodge of all different sizes and types of fittings mixed together, with no logical way to search for a fitting.

The Straub site looks interesting, but since it was in German?, I couldn't decipher much.

flyinghigh try www.straub-couplings.com for english

Good morning again, roadapple. Thx for the tip, I will familiarize myself with the details.

Snooping around I found this web calculator:

http://www.porcupinepress.com/_bending/segmentbends.htm

Although its for conduit you con use it for pressure pipe bending. What we usually do is take the segment of pipe we want to bend and fill it up with sand. Obviously you need a base to support and bend the segment.

Good morning, 95324, thx for the note. I will keep this in mind during construction.

flyinghigh,

Try Spears manufacturing's catalog of SCH-40 PVC fittings for glue type at: http://12.107.25.236/smcweb/EINM022.pgm?CurLiblObj=SMCPRO&Tab=SCHDL40FTTNGS&Book=40-1&Rndm=307499648

Flyinghigh,

Try this link to a North American manufacturer of PVC/ABS/CPVC piping systems: www.ipexinc.com. The website also has the physical properties for PVC piping materials as well that you may find quite useful.

Greywolf

Thx, Greywolf, I have downloaded it and will study it thoroughly.