I can't imagine anyone using PIPE for a serious antenna installation on a
tower, unless that antenna would be mounted 6" or so above the top of that
tower. Any serious bending movement will potentially reduce that mast to a
pretzel. Julio was correct in this assessment in an earlier email. Another
earlier email indicated that real "masts" are available from Texas Towers.
Pricey, yes. But without the real deal, you are potentially introducing a
real weak link to your system. Having a real GALVANIZED steel mast on a
tower to me is no less important than having rotor cable running to the
rotor. Pipe is for routing water. - Mike
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of jimlux
Sent: Thursday, March 18, 2010 9:15 AM
To: Tower and HF antenna construction topics.
Subject: Re: [TowerTalk] 2" O.D. Pipe???
k2qmf@juno.com wrote:
> Hello All,
>
> I went in search of 2 Inch O.D. pipe
> on the internet!!
>
> Guess what? I can't find any!!!!
>
> The outside diameter of pipe is
> either 1.9" O.D. for 1.5 inch pipe or
> 2.375" O.D. for 2 inch pipe!!!
> Nothing in between....
>
> What am I missing??
>
>
Pipe vs tube
pipe is supplied in "nominal" sizes (e.g. 1" pipe has no dimension that
happens to be an inch).. you have to go look up in tables what the
actual dimensions are for pipe.. it deepends on material (steel,iron,
copper, aluminum, etc.), the pressure rating (schedule 40,80, 160, etc.)
tubing, on the other hand, is dimensionally true. If you order 2"
tubing, it will be 2" OD. You can recognize tubing because it will be
specified as a diameter and a wall thickness (e.g. 2"x1/4" tubing)
There *is* tubing sold in odd dimensions, generally to match the OD of
pipe (for handrails and scaffolding: Hollaender SpeedRail for instance)
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