RE: PIping Trivia

From: <Bruce>
Date: Fri Oct 12 2001 - 11:40:00 EDT

A figure 8 is a two-lobed arrangement, pretty much like a blind flange and a spacer welded at their tangent. If the "blind flange" lobe is exposed (not between the flanges of the pipe), it indicates that the line is "open" and if the "spacer" lobe is exposed, it indicates that the line is blocked.

A paddle blind is basically a blind flange with a handle welded at it's perimeter.

It's been years since I've used a figure 8, but they were typically "built in", with a pivot arrangement, so you were pretty much required to have one lobe or the other in place. You had to pull most of the flange bolts to make a change, so it isn't something you did without discussion and planning, but it was a positive way of blanking a line and assuring it was done.

                                         ... Bruce D. Bullough ...
                                         Sebesta Blomberg & Associates
                                         2381 Rosegate
                                         Roseville, MN  55113
                                         651-634-7344 (office)
                                         651-634-7400 (FAX)
                                         www.sebesta.com

-----Original Message-----
From: Christopher Wright [mailto:chrisw@skypoint.com] Sent: Friday, October 12, 2001 9:09 AM
To: ?
Subject: RE: [PipingDesign] PIping Trivia

>> Do you have more info as to why paddle vs. 8's are used? Is it a
>> cost issue?

I'm gonna stick my neck way out here and someone to explain what a figure 8 and a paddle blind is. I've never heard the terms.

Christopher Wright P.E. |"They couldn't hit an elephant from <a href="/group/PipingDesign/post?postID=16hJUD3qhmQ5sFPbJKB-xwBXxdR9w6jPfGNfCi296fOOc5Qwa23XS4yD-Ba3yE8xYxKiOera_bHiA8ZLXKY">chrisw@skypoint.com</a> | this distance" (last words of Gen.

___________________________| John Sedgwick, Spotsylvania 1864)

<a href="http://www.skypoint.com/~chrisw">http://www.skypoint.com/~chrisw</a>

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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 Fri Oct 12 11:40:00 2001