Re: PIping Trivia

The term "figure 8" is often used for a "spectacle blind", which is basically a flat ( +- 6-15mm thick) plate, which is cut in the shape of an 8 i.e. an "open" half (which has a hole in it and looks like a gasket) and a "closed " end with no hole. These two circles are joined to one another by a short bridge which makes it resembling an 8 or a pair of spectacles O-O. When clamped between eg a flange and valve, it could be inseterted so as to block the downstream line, or swung to still be in place but the line would be open.

A paddle flange is simply the blocking side of the 8 described above with no open end to it. The bridge is still there and the total looks like a paddle -O.
----- Original Message -----
From: Christopher Wright <chrisw@skypoint.com> To: ? <PipingDesign@yahoogroups.com> Sent: Friday, October 12, 2001 4:08 PM
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
> chrisw@skypoint.com | this distance" (last words of Gen.
> ___________________________| John Sedgwick, Spotsylvania 1864)
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Received on Sat Oct 13 08:37:00 2001