Miter bends or elbows ?

[fernando avila]

Hi all,

I do not understand the difference between miter bends and elbows. I know
miter bends are building with small welding pieces but Can anybody explain
me ... Where Can I use them ?

Thank U,

Fernando Avila

[Joe Geluso]

On 28 Apr 99 07:07:39 CST, "fernando avila" <fernand...@mwk.com>
wrote:

>
>Hi all,
>
> I do not understand the difference between miter bends and elbows. I know
>miter bends are building with small welding pieces but Can anybody explain
>me ... Where Can I use them ?

A miter bend may be made with only two pieces. A 90-degree turn can
be made by cutting two pipe ends at 45-degrees and welding them
together. This makes for one weld at the miter rather than two welds
-- one at each end of a prefabricated elbow fitting. This
construction may be less expensive than using an elbow fitting, but
the pressure drop -- hence, pumping cost -- is higher.

Miter bends are used in piping to minimize installation cost or where
space constraints make using a standard fitting impractical. They are
not preferred from an engineering perspective if they can be avoided.

Miters of more than two pieces are 'multi-gored'. A 3-gore mitered
elbow consists of three pieces joined together. Multi-gored elbows
are often used in ductwork systems. Mitered duct fittings are
normally understood to be (but usually not spoken of as) 2-gored.

-- Joe Geluso

[Vince]

fernando avila wrote in message <01be916f$b5ed0780$4f2ac222@my0270>...

>
>Hi all,
>
> I do not understand the difference between miter bends and elbows. I know
>miter bends are building with small welding pieces but Can anybody explain
>me ... Where Can I use them ?
>

> Thank U,
>
> Fernando Avila
>
>
An elbow is a wrought or forged fitting that is used to produce a change in
flow direction in a piping system (e.g., 90 degrees, 45 degrees, etc.). A
miter produces the same change in flow direction, but it is fabricated by
welding short pipe sections together. A miter is normally considered for
use in larger diameter piping systems where the cost of fabricating it is
much less than the cost of an elbow. There is also less availability for
larger diameter wrought elbows.

The flow path through an elbow is somewhat smoother than that through a
miter, but this can be improved by using a larger number of pipe pieces/weld
lines to make up the miter (i.e., more pieces --> smaller turning angle per
piece). From a piping system flexibility analysis perspective, a miter bend
will typically have a higher stress intensification factor than an
equivalent elbow. But this can also be improved by having more miter welds.

Vince Carucci

[tmtpe...@gmail.com]

On Wednesday, April 28, 1999 at 12:00:00 AM UTC-7, fernando avila wrote:
> Hi all,
>
> I do not understand the difference between miter bends and elbows. I know
> miter bends are building with small welding pieces but Can anybody explain
> me ... Where Can I use them ?
>
> Thank U,
>
> Fernando Avila

Thank you for this response!!

[ska...@gmail.com]

Difference between a pipe elbow and a pipe bend is as follows:

Pipe Bend is a generic term for any offset or change of direction in the piping. It is a vague term that also includes elbows.
An elbow is an engineering term and they are classified as 90 deg or 45 deg, short or long radius.
Pipe elbows have industrial standards and have limitations to size, bend radius and angle. The angles are usually 45 deg or 90 degrees. All others offsets are classified as pipe bends.
Bends are generally made or fabricated as per the need of the piping; however elbows are pre fabricated and standard, and are available off the shelf.
Bends are never sharp corners but elbows are. Pipe bending techniques have constraint as to how much material thinning can be allowed to safely contain the pressure of the fluid to be contained. As elbows are pre fabricated, cast or butt welded, they can be sharp like right angles and return elbows which are 180 degrees.
Elbow is a standard fitting but bends are custom fabricated.
In bends as the pipe is bent and there is no welding involved, there is less pipe friction and flow is smoother. In elbows, the welding can create some friction.
All elbows are bends but all bends are not elbows.
Bend has a larger radius then elbows.
Generally the most basic difference is the radius of curvature. Elbows generally have radius of curvature between one to twice the diameter of the pipe. Bends have a radius of curvature more than twice the diameter.

https://www.steeljrv.com/difference-between-a-pipe-elbow-and-a-pipe-bend.html

[dlzc]

Dear ska...:

On Wednesday, May 9, 2018 at 4:44:57 PM UTC-7, ska...@gmail.com wrote:
> Difference between a pipe elbow and a pipe bend is as follows:

This is a 19 year old thread. There is no benefit to be had in responding here.

David A. Smith

[Wally W.]

Probably no benefit to the OP, unless they are **really** patient. But
relevant information is always relevant.

I can find it interesting to read how someone else defines terms, so
the post wasn't completely lost on me.

[dlzc]

Dear Wally W.:

On Wednesday, May 9, 2018 at 10:31:13 PM UTC-7, Wally W. wrote:
...

> I can find it interesting to read how someone else
> defines terms, so the post wasn't completely lost on me.

Better than the spam that ends up being dumped in inactive newsgroups, for sure.

David A. Smith

[alina...@gmail.com]

Miter bends are not standard pipe fittings they are fabricated from pipes. Usually, they are preferred for size 10” & above because large size elbow is expensive. Use of miter bend is restricted to the low-pressure water line. Miter bend can be fabricated in 2, 3, & 5 pieces.

Learn more about it:

https://www.cnhbsteel.cn/what-is-miter-bend/