30inch water pipe laying advice
30inch water pipe laying advice
(OP)
Hello - new to the forum. Wanting to do some preliminary planning for laying 25,000+ feet of 30 inch .25 to .5 inch wall, carbon-steel pipe for hydro penstock. Want to keep costs modest for non-profit irrigation co-op. Considering used pipe - asking for one end to be flared to allow "spigot" connection, simpler to keep pipe on-round for welding. Hoping to find creative solutions to hauling and laying pipe, which is beside existing road. Anyone have experience with "DIY" - how do we determine "best" number of boom-style pipe layers, since we have identified good used inexpensive turbines and generators and the pipe seems to be the biggest challenge. thanks Rog





RE: 30inch water pipe laying advice
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: 30inch water pipe laying advice
RE: 30inch water pipe laying advice
30" steel, you can stack on a truck to 3 levels. And some road building is often part of the job, but I had to use helicopters to fly up one 40' joint of 24 D up at a time when crossing some areas of the Andes. In Saudi, we had some very rough terrain going to 3000 m elev, but were able to build some often quite narrow roads to get it there. Switch backs on some slopes and on others, we stalk-joined pipe down below and winched it up a joint at a time as we added a new pipe. Won't work very well for bell-spiggot though.
I've got some pics on my web pages.
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: 30inch water pipe laying advice
You seem to have decided on carbon steel pipe, but did not mention whether the line is to be buried. Are you planning on laying the pipe on soil?
If the pipe is to be buried, then what coating or corrosion protection is planned?
An alternate material for the pipe would be HDPE. Coating is not required for buried service. Above ground service does not require painting. The pipe fusion joint machine would be significant cost / lease. There would be some cost savings from reduced weight compared to steel.
Check for pipe laying equipment on some of the projects at
www.isco-pipe.com
www.kwhpipe.com
www.mcelroy.com
RE: 30inch water pipe laying advice
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: 30inch water pipe laying advice
I am worried about moving it into a trench, with allowable bends about 50 x D, we'd need a radius of about 150ft, going from roadside into a trench, 5 to 8 feet away, including setting to grade, means about 30 to 50 feet of pipe x 2 will be "S-bending", and have to be carefully lifted since the .25 to .31 wall will want to buckle. The .5 wall will be about 200#/ft, so lifting 60 to 100 feet, means up to 20,000 lbs. I'd like to minimize the site equipment, so I wonder if two pipe-layers can effectively move the .5 wall, or if we'll need 3 (or 4)? I think we can set the .25 to .3 wall with 2 layers. And part of the fun is DIY - "community" project with "no money". - Oh - get this - I think there is an agency with several suitable pelton wheels up to 3.5 mW, willing to donate them (I've had my eye on them for years). Roger
RE: 30inch water pipe laying advice
There are pleanty of external coating to go with either or both of an inpressed current or zinc anode CP system.
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: 30inch water pipe laying advice
RE: 30inch water pipe laying advice
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: 30inch water pipe laying advice
RE: 30inch water pipe laying advice