[TowerTalk] Pipe Dimensions

[dan hearn]

The Machinery's Handbook shows schedule 40 two inch pipe has an OD of
2.375 inches and ID of 2.067 inches. This is the most commonly available
2 inch pipe but there are others. Schedule 80 pipe has an OD of 2.375
and an ID of 1.939. It appears that the OD of this pipe is constant
while the wall thickness needed to take the pressures (40kpsi and
80kpsi) is varied. 73, Dan, N5AR

Stan or Patricia Griffiths wrote:
> 
> Hi Rick,
> 
> My Rohn Catalog shows the 45AG2 has 2 3/8" OD 2" Standard Pipe at the
> top.  Since pipe is measured using the ID, a 2" pipe has a 2" ID.  I have
> no idea what the tolerances are for this ID measurement and you have to
> bear in mind that you need to allow some clearance if you are planning to
> put a rotating mast inside of it.  You probably need about 0.050"
> clearance for a good fit and still allow rotation without binding.  I
> think you will end up needing an odd sized mast which might be hard to
> find.
> 
> Better you should consider getting a 45AG3 top which uses 2 1/4" OD 14
> guage tubing at the top and matches a 2 inch OD mast very well.  I know
> this sounds expensive, but it will certainly cause you a LOT less trouble
> trying to match a mast to it.  If you go with an odd sized mast, then you
> have to worry about it fitting the rotator and antenna mounting hardware
> properly . . .
> 
> All you asked about was dimensions of a 45AG2.  Did I assume too much?
> 
> Stan
> w7ni@teleport.com
> 
> Rick wrote:
> 
> > What is the maximum od of mast that will fit in the pointy top section
> > of rohn 45ag2?  Thanks   Rick wa5rt

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