Where can I get a conical reducer?

[KernOily]

Do any of you know if a conical reducer is a commercially-available pipe fitting? I did a web search and have not found anything.

I need a buttweld conical reducer, CS or SS, flanged or buttweld, 12x10 and 12x8. These are going on a pump suction of a BFW pump to reduce the turbulence.



Thanks!
Pete

 

[Yorkman]

By conical reducer do you mean concentric reducer? Try

http://www.weldbend.com

They have a large selection of CS weld type fittings.

I'm not a real engineer, but I play one on T.V.
A.J. Gest, York Int.

 

[KernOily]

Thanks Yorkman. But nope, I mean a reducer that is shaped like a true cone. A regular concentric forged (wrought) butweld reducer has a sort of S-shaped curvature to it. I need a straight cone.


Thanks!
Pete

 

[MikeHalloran]

Any "marine exhaust" shop can make it for you.



Mike Halloran
Pembroke Pines, FL, USA

 

[MikeHalloran]

Also get the catalog at felkerbrothers.com.





Mike Halloran
Pembroke Pines, FL, USA

 

[Yorkman]

74Elsinore,
Thanks for the clairifacation, I have seen them and have had them made locally although we had problems with getting one that was any where close to round. It had a tendency to be egged. Welding flanges on the ends did help, other wise it would have been a difficult field fit/weld.

I'm not a real engineer, but I play one on T.V.
A.J. Gest, York Int.

 

[katmar]

I doubt whether you will find such a thing commercially available because there are an infinite number of permutations of included angle and face to face dimensions. I have seen light gauge stainless steel reducers made commercially out of plate to the same face to face dimension as standard reducers, but these would not be suitable for BFW duty.

My experience is the same as Yorkman's in that I have had to have them specially made up where they have been specified for special high-accuracy flow meters. However, I wonder if the inevitable out-of-round problems, plus the weld bead on the inside, do not introduce more flow irregularities than a standard off the shelf reducer would.

I suspect the specification of conical reducers is really a result of theoretical "ivory tower" thinking and that a standard eccentric reducer would do the job equally as well (if not better). If your pump supplier has specified this reducer, ask them where they are normally supplied from. If your design is so close to the edge that the shape of the reducer is critical I would recommend that the design be re-thought.

Katmar Software
Engineering & Risk Analysis Software

http://katmarsoftware.com

 

[Yorkman]

74 Elsinore
If it's turbulance your concerned with is there enough room at the suction of your pump to go with a standard concentric reducer and a straightening vain spool piece to get you a more laminar flow pattern? When Katmar mention flow measurement I recall a number of times we put in a staightening vain to make up for a short upsteam piping diameter recommendation for a venturi fitting we had installed, it seemed to do the trick. Just a thought.

I'm not a real engineer, but I play one on T.V.
A.J. Gest, York Int.

 

[vzeos]

74Elsinore:

Steel Forgings, Inc. produces conical reducers. Contact info:

Steel Forgings, Inc.
1810 Barton Dr., PO Box 7365
Shreveport, Louisiana 71137-7365
UNITED STATES
Phone: 318-222-3295
Fax: 318-222-6185

 

[JStephen]

We commonly make them up or have them made. Usually, they are laid out in two or three sections, formed on press brake or ironworker, depending on size. I've seen pictures of conical sections several inches thick being formed- it's not an uncommon operation.

 

[imok2]

74elsinore Go here:

http://www.ancorp.com/line.aspx?id=766