RE: Piping Trivia Questions Again

From: <SARE>
Date: Sat Jun 09 2001 - 04:47:00 EDT

1. the term that we used is " all bolt holes to straddle N/S horizontal centerline unless noted". this is to assure that all flanges will match - i.e. the bolt holes.
2. minimum lenght of threaded nipple is 3" because of the sonaray reading (our practice here). note that there at least 3 types of nipple - close, threaded both ends and POE-TOE plain one end, htreaded other end.
3. this is a trick question. Armstrong makes both steam and condensate trap.
4. not necessarily. tp purge aslo means to create a postive pressure within a confined space.
5. sure does. wont work in vertical position depending on the process flow (up or down).
6. question is not clear. but the setback is required for slip on.
7. normally use eccentric for 3" and above (pump suction). term used is "top flat". this is to avoid pocket and create a vapor space.good write up on the pump handbook by karrasik.

-----Original Message-----

From: Paul Bowers [mailto:pbowers@pipingdesign.com] Sent: 09 June, 2001 3:54 AM
To: <a href="/group/PipingDesign/post?postID=3QzyEmPC6o77Y4hooWN_Y1uZu6YCC8HAbdEXQGRFOSSH-YgknDs7ALBWMIwq6kEMEGXKPBTZ_DQa2DZiYmc7ooGWneXM">PipingDesign@yahoogroups.com</a> Subject: [PipingDesign] Piping Trivia Questions Again

Just for fun, I thought I'd ask the list a few questions (some answers I know, some I don't - this should be fairly easy for anyone trained prior to the CAD revolution):

-why the bolts on a flanged (piping) connection are always
staggered about the X, Y and Z axis

-why is a standard pipe nipple 4" long

-why is it called a "trycock"

-is it really a "steam" trap or a condensate trap

-does the term "purge" refer to an artificially-created
pressurized expulsion of contained fluids

-is it important to install butterfly valves in a particular
orientation in a pipeline, considering the high pressure side issue

-is it "cheating" to consider the variable setback of a slip-on
flange as a field-fit variable

-why specify that an eccentric reducer be installed as "flat on
top"

I could think of more, but since we have a lot of old-timers/experts/experienced guys (I am humbled by the knowledge out there - I'm just a piping hacker) around here I thought I'd throw this into the forum.

The newcomers to the field will surely appreciate input, and since my goal is to close "the piping gap", I think it's a good exercise. The newbie you help out today may be hiring you at an exorbitant hourly rate tomorrow!

Paul

---

Piping Design Central
[ http://www.PipingDesign.com ]

---

We hope you find this newsletter useful. If not, you can unsubscribe at:
<a href="/group/PipingDesign/post?postID=4hnxq9IgJMlJwBhvd4oqAqxM1HE4pYiSlYGdmxkJSc53npfExspGIHqMPZddJlv9rqf2pzjmTKgZZvnkdwY9YW0p2w4rOuKtXOMvTmP4oKaHTQ">PipingDesign-unsubscribe@yahoogroups.com</a> Post message: <a href="/group/PipingDesign/post?postID=3QzyEmPC6o77Y4hooWN_Y1uZu6YCC8HAbdEXQGRFOSSH-YgknDs7ALBWMIwq6kEMEGXKPBTZ_DQa2DZiYmc7ooGWneXM">PipingDesign@yahoogroups.com</a> Subscribe: <a href="/group/PipingDesign/post?postID=lU5kN1JBDmiZYr8K1vi8xqENb6GjjymyRL52kdPYz07o9rmrJe7qZ07-86RSIOH9iCr5po72z27n8pwtWjZeoktp5FthCl3u0Z6qKLbC">PipingDesign-subscribe@yahoogroups.com</a>

Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Sat Jun 09 04:47:00 2001