"Peter J. F. Shaw" wrote:
> Greetings Dick W5AA & TowerTalkians:
> Did anyone entirely translate the spec information contained in the
> posting below? I remember a single posting from K7LXC indicating that
> maybe the pipe was maybe a sched 40 and not strong enough. I was
> expecting (and hoping for) a lesson on how to translate the coding.
>
Dick, W5AA wrote:
> SNIP
> " Wheatland cbw rn 1176 cbw rm 1504 astm A53 -f- gra 40 A 21 foo
> 32698 DI." This has an outside Diameter of one and three quarter
> inches.
SNIP
I'll take a guess at what it means.
All of the stuff before "astm" is probably the manufacturers nomenclature.
I'd guess that the manufacturers name is Wheatland.
The pipe was manufactured in accordance with the ASTM A53 spec, probably
Rev F, Grade A, Schedule 40 wall thickness.
The last stuff is kind of a mystery to me. It might mean a 21' length and
a manufacturing date of Mar 26 1998 at a plant designated DI. Not very
sure about this.
ASTM A53 Grade A tells us it is either seamless or has an electric welded
seam. only a visual look at it would confirm which one. It doesn't matter
as both have the same yield strength of 30,000 psi in my old Jorgensen
steel manual. If it was a grade B material, the yield strength would be
35,000 psi. So, its not quite as strong as a good 6000 series aluminum.
The OD is probably not 1 3/4" but 1.90" which makes more sense with the
original comment about it just fitting the Rohn TB3 bearing.Wall thickness
would be .145" and it would be 1 1/2" nominal pipe size.
Anyway, that's what my crystal ball sez.
--
73, Kurt
K7NV "That's K7 "Nevada" (ex - NI6W)
YagiStress - The Ultimate Software for Yagi Mechanical Design
Visit http://www.freeyellow.com/members3/yagistress/
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|