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Joint for pipe tower?
By Old F, Section Homebrewed Electricity Posted on Thu Dec 11th, 2003 at 07:25:24 PM MST
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Joint for pipe tower?
Has any one tryed using 1/4 inch or 3/8 steel plate to make weld on flanges to join two
lengths of pipe ? Been kicking a round some tower ideas.
I know they make weld on pluming bolt up flanges but don't know if they would be strong enough or what they would cost.
The flange can also be used as a place to attach guy wire.
Old F

Joint for pipe tower? | 6 comments (6 topical, 0 editorial)

Re: Joint for pipe tower? (none / 0) (#1)
by Hank on Thu Dec 11th, 2003 at 09:26:21 PM MST
(User Info)

Old F

I used 1/4" steel plate to re-enforce the welded joint of my tower. I used two sections about 2" wide and about 10" long. I then formed a semi-circle in the middle of these to fit around the pipe, clamp style (this took some work). The ends that were protruding were drilled and bolted together around the pipe for a tight fit. I then welded this to the pipe. These also are used as the connection points for my guy wires. I used a total of four pairs (also for 4 guy wires).

I did not trust a welded joint just where the pipes slide in together. To much time invested to have a failure such as this. Incidently my tower is 44 feet high consisting of 3" pipe, 2 1/2" pipe and a small section of 2" pipe.

So far so good,
Hank

Re: Joint for pipe tower? (none / 0) (#2)
by RobC on Fri Dec 12th, 2003 at 07:48:58 PM MST
(User Info)

I think that I would make some slip coupling and bolt them together myself.
RobC

Re: Joint for pipe tower? (none / 0) (#3)
by Old F on Fri Dec 12th, 2003 at 11:29:47 PM MST
(User Info) http://www.oldf.homestead.com

Here is what I am thinking . It is sort of like what Hank is doing.

You set the 2 an ½ inch pipe in to the three inch and then bolt the welded flanges together

Old F

[ Parent ]

Re: Joint for pipe tower? (none / 0) (#4)
by RobC on Sat Dec 13th, 2003 at 01:43:15 PM MST
(User Info)

Just let the small pipe extend a foot or so into the other pipe. If its a very loose fit weld 3 small spacers on the bottom of the small pipe to take up slack.
If the pipe is going to break it will break at the weld on the flange on the small pipe first 3 small gussets might be good idea. Other than that I don't see how you could improve on it. RobC

[ Parent ]

Re: Joint for pipe tower? (none / 0) (#6)
by Hank on Sat Dec 13th, 2003 at 06:54:07 PM MST
(User Info)

Old F,

Actually this is what I did. (hope photo comes through).
Two at right angles to each other at all joints, which is also where I connect my guy wires.

Perhaps an over kill but a cheap investment.
Hand CAD is faster!

[ Parent ]

Re: Joint for pipe tower? (none / 0) (#5)
by drdongle (Dr.Dongle1@juno.com) on Sat Dec 13th, 2003 at 05:01:11 PM MST
(User Info)

I was working on my "small" tower today and to attach two pieces together I slipped 12" of one into the other and drilled two 1/2" holes through the two pipes 2" from each end and will insert two 3" schedule 8 bolts through with nuts to hold it together. seems a lot simpler and more secure that the welded flanges.
I might add a third bolt 180 degrees from the others if there is any wobble.

Just my $0.02 worth

Dr.D
Carpe Vigor, Dr.D

Joint for pipe tower? | 6 comments (6 topical, 0 editorial)

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