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Metal Bellows Technical Overview

Even if you are a professional researchingaccording to the specifications of the job in
information on metal bellows for technicalhand. Often, a custom-made alloy can be
solutions and for installation of industrialdesigned  to  meet  a  job's  requirements.
processes, it can sometimes be helpful (even
to the professional) to gain an overview ofWhat specific applications are there for this
the product, what it can do, and just whattechnology?
situations  it  has  been  developed  for.
The central purpose for metal bellows is in
This guide will give you a few generalfluid management. This, however, finds use in
pointers, and hopefully answer some of thea great many things. Expansion joint
questions you have. Of course, it is a guidesolutions have been employed in industries
only; for detailed answers to any specificand technologies such as altitude sensors,
questions you have about projects you maypiping for industrial coolant, the
have in mind, we recommend contacting anpetrochemical industry, applications
expert  in  the  field.involving steam, the nuclear power industry,
medical technology, waste management, and
What  does  a  metal  bellows  actually  do?some  automotive  engines  and  pump systems.
A metal bellows is the term for an attachmentWhat kind of tolerances can be built into it?
on piping typically designed to absorb and
mitigate the effects of directional changeA metal bellows can be designed to cope with
and to minimize any issues arising from thisa wide variety of different stresses and
such as clogging, pressure points on thepressures. The three main types of movement
bend,  or  expansion  of  the  joint.are referred to as lateral, axial and
angular.
It is a development of the basic expansion
joint idea used on installations like railLateral is a movement of the two ends of the
tracks to deal with the expansion andjoint where those ends stay parallel to each
contraction of metal. The central concept toother. Axial is either the stretching or
keep in mind is that when subjected to force,flattening of the expansion joint along its
either heat or pressure, the metal bellowslength. Angular movement is simply the
allows the expansion joint to bend rathercurving round of the joint along its axis. At
than  break.present, expansion joints can be designed to
cope with any of these three specific stress
Why  metal?types.
Metal expansion joints are, simply put,The one type of movement they cannot deal
stronger than the alternatives (plastic,with, however, is torsion, namely twisting
ceramics, etc). They are also easier to shapealong the piece's length. This is best
(although metal bellows are relativelyavoided by keeping the joint fastened in
intensive  to  create).place by external attachments, and taking
care with the fastening when attaching it in
They are also more capable of coping withthe  first  place.
extremes of temperature, as they themselves
can expand and contract without sustainingHow  much heat can a metal bellows withstand?
the weathering damage that hard plastic
would. There are rubber versions available,This varies greatly depending upon a variety
but their use is strictly limited, and in anyof factors; the alloy chosen, whether or not
situations involving heat, for example, theyany anti-corrosives are added, the design of
are  impractical.the bellows itself, and whether it was welded
or shaped. There are certain practical
Heat-tolerant bellows and expansion jointssolutions and physical limits, but as long as
can be made from a variety of metal alloys,the heat is foreseen, joint solutions can
such as steel, titanium, and many othersusually be found.



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