RE: Bolting and Valve Length Question

From: <Dennis>
Date: Fri May 27 2005 - 20:59:00 EDT

Paul,

I had this problem once before. We had special nuts manufactured, three times the height of a standard nut, and used these in the middle of the wafer check to join short stud bolts together.

Regards
Dennis Kirk-Burnnand B.E. (Mech)
DENNIS KIRK ENGINEERING
denniskb@ozemail.com.au www.ozemail.com.au/~denniskb

   -----Original Message-----
   From: PipingDesign@yahoogroups.com [mailto:PipingDesign@yahoogroups.com]On Behalf Of Paul Bowers

   Sent: Saturday, 28 May 2005 8:17 AM
   To: PipingDesign@yahoogroups.com
   Subject: Re: [PipingDesign] Bolting and Valve Length Question

   Thanks again Steve, good advice even though I'm being a bit flippant and    trollish below.

   There is a 90 degree elbow directly connected to the flange, so there is    possible interference. A scale Autocad drawing makes this obvious, but    the "double curve" of the ell makes it hard to tell if things will fit.

   Maybe I need FEA software.

   Paul

   Steve McKenzie wrote:

> Hi Paul
> if you are stuck for space, there is a type of valve that may help. It
> is used as the main isolator on some steam turbines and functions as a
> (swing) check and an isolator in one. It looks a bit like a tilt check
> with a screwed shaft that forces the disc onto its seat. Often called
> CIES (combined isolating and emergency stop) valve.
> However it wont help if the purpose of the gate is maintenance isolation
> for the check.
> You don't need through bolts to do what you intend; just bolt through
> one side of the gate, bridge the check and bolt up to the pipe flange.
> You should have enough space for that as you only need nut depth plus
> washer plus a few thread turns on each of the gate flange bolt holes.
> The check will not last very well though, as it will see the turbulence
> from the gate trim.

---

   PipingOffice - Excel Spreadsheets for Piping Calculations    http://www.pipingoffice.us/

---

   Main site: http://www.pipingdesign.com

---

--
   Yahoo! Groups Links

     a.. To visit your group on the web, go to:
     http://groups.yahoo.com/group/PipingDesign/

     b.. To unsubscribe from this group, send an email to:
     PipingDesign-unsubscribe@yahoogroups.com

     c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.



[Non-text portions of this message have been removed]

Received on Fri May 27 20:59:00 2005