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Why can’t I put control
rods on the braided metal connectors “PumpSavers”, the specification
call for them?
All braided
metal hose assemblies can only function properly if the braid
end-loads (remains in tension). The corrugated metal hose only
functions to contain the media. It is the braid that must carry the
system pressure. If the braid is loose or bagged on the assembly it
will create a void where the hose can squirm with-in the braid. The
squirm will lead to deformation of the hose convolutions which in
turn will lead to premature failure of the hose.
The pipe run I have,
and the thermal growth, is too great for one compensator so I’ll just
put two compensators in the run. This will work won’t it?
Two expansion
devices can not be placed within a pipe section. The two
devices will work against each other as they can never be exactly
matched. All expansion devices can only function independently. If
you have more motion than one expansion device can handle you must
split the run into separate sections with an intermediate anchor.
Why is Flex-Hose Co.
directing me to a “stocking representative”, why can’t I just place
the order directly with Flex-Hose directly?
Flex-Hose
representatives are an integral part of our customer support
structure. They are factory trained and see many field applications
of our products. They are eager to assist you in determining the
most suitable product for your flexible piping application. In
addition to their application expertise they bring our products
closer to you by stocking the most used products locally.
How much axial
compression can an SMP “braided metal PumpSaver” handle?
A braided
metal hose assembly is suitable for vibration and/or lateral offset.
It is not capable of axial compression or extension. All braided
metal hose assemblies can only function properly if the braid
end-loads (remains in tension). The corrugated metal hose only
functions to contain the media. It is the braid that must carry the
system pressure. If the braid is loose or bagged on the assembly it
will create a void where the hose can squirm with-in the braid. The
squirm will lead to deformation of the hose convolutions which in
turn will lead to premature failure of the hose.
Can I use an SMP or SMN
in a steam application?
As long as the
motion is just vibration or lateral offset and the pressure rating of
the assembly is not exceeded (with the appropriate elevated
temperature de-rating factor) they are suitable for with steam.
I don’t see the fitting
I need on a braided hose assembly in the catalog or on the website.
Are other end fittings available?
Flex-Hose Co.
manufactures all braided metal hose assemblies in E. Syracuse, NY.
If you have a special requirement please do not hesitate to contact
our office (or your local representative). If the fitting can be
welded we can likely put it on a metal hose assembly.
How do I figure out how
long an assembly I need to make a fixed offset of 3” with a 4” ID
hose assembly?
There are
several considerations that must be made. Give us a call with your
specific application and we will gladly calculate it for you.
Why can’t I get a seal
on the mating flange for the rubber expansion joint I just installed?
The most
common answer to this problem is that the piping is not properly
anchored and control rods have not been installed. Once the system
is pressurized the pressure thrust is trying to pull the connector
off the mating flange. You must either anchor the system or install
and set the control rods in order to achieve a seal.
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