Hello all,

If you just need a little comic relief for your day, check this one out:

http://www.eng-tips.com/viewthread.cfm?qid=188952&page=1

I am glad Ed posted this one.

Another thought:

It was not my intention to reflect negatively on any company that is supplying hardware and equipment. I only wanted to "wave a flag" to those who might not consider all the issues before properly using such equipment.

Regards, John.

You have to hand it to them PTP boys.... 63 kips on what size line I wonder???

It's insulated, 36" dia, apparently supporting the 63K (axial ?) load through the insulated part of the restraint.

Maybe for a vertical pressure vessel 36" in dia?

To All,

The old Grinnell handbook (5th ed 1976) has a table in back "Safe Loads on Steel Pipe Columns", Allowable Concentric Loads in KIPS (1000 lb). pg 227.

The NPS-6 std wall pipe shows allowable load of 64 kips for 20 ft length.

The NPS-16 XS wall pipe shows allowable load of 273 kips for 50 ft length.

Never have used this table, except to cross-check some T-Pole supports.

Were they too optimistic? I don't think so, but 63 kip does make one hesitate and think.

Also note that the design temperature is subzero, so the piping may be under tension, not compression.

P/A = Stress

When A is big P can be big... for a big pipe this may be fine but D/t ratios may be of concern just using CAESAR II on it alone....

Hey y'all,

These are all good thoughts and I am glad my posting evoked considered responses.

Hi Ken. Yes, tension loading will eliminate buckling (like the spokes on a bicycle wheel). I am looking at some NPS 14 pipe right now that may see temperatures as low as -260 degrees F (an auto-refrigeration event). One end is attached to a knock-out drum and one end is attached to an NPS 30 flare header that will see 200 degrees F.

Richard, I am looking for my Grinnell book now. I am interested to see what all was considered (keep in mind that about that time Helmut Theilsch was the Chief Engineer at Grinnell and he was one of the greats).

I guess any time I see loadings that high I immediately wonder. Will the pipe connection accommodate the load, will the structure that the appurtenance is connected to accommodate the load? I think that was Ed's thought too - sometimes designers will install "load rated" support hardware and not fully consider all the other issues involved.

Herr Luf, I think the Belgiens make the best wheat beer!

Regards, John.

"Herr Luf, I think the Belgiens make the best wheat beer!"

Second only to Market Street Wheat from the Great Lake Brewing company....

see....http://www.greatlakesbrewing.com/beerOurBeersPE.php

Market Street Wheat
A classic Hefeweizen served unfiltered to showcase the hints of clove and banana.

ABV: 5.3% ABW: 4.2% IBU: 20
AWARDS
Silver Medal, 2006 World Beer Championships
Bronze Medal, 2001 World Beer Championships
Silver Medal, 1996 World Beer Championships

Und Ein Prosit!