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Woven Wire often known as Wire Cloth or Wire
Gauze can be woven in many different patterns. It is available
in plain weave which is the most popular followed by twill,
plain dutch weave, dutch twill weave, reverse dutch weave
and multiplex weave. Crimped mesh is also available which
is made from wire mechanically crimped or pressed prior to
weaving.
It is made by weaving wires of different diameters or a combination
of diameters. This determines the aperture, the open area
and the strength of the material. A thicker wire will produce
a more robust weave, but the aperture and open area will be
reduced giving a slower flow rate to the material passing
through. If a thinner wire is used the opposite will apply.
Mesh counts are generally quoted per inch for example in plain
weave 20 mesh there are 20 strands of wire running in each
direction per square inch. It can vary in texture from being
as fine, soft and flexible as silk to being as rigid and durable
as steel plate. Length and widths are given in metric or imperial.
Advantages of Woven Wire
The weaving process uses no punching, piercing
or stretching operations that can produce stress induced weaknesses.
It can be formed shaped or moulded without risk of fracture.
As a precision woven product it has the ability to maintain
accuracy of aperture size offering enormous scope for its
use in filtration. As a screening medium its potential for
a variety of particle, fluid, gas, separation, cleaning and
sieving applications is unequaled. It provides the widest
range of filtration, giving aperture sizes from over 10mm
down to 23 micron nominal with a high open area/flow rate.
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Availability
It is manufactured in rolls 30M long and normally
in widths of 914mm, 1000mm or 1220mm wide. It is priced by
the length required or the square metre. We provide a full
and comprehensive finishing service for all of our materials,
including cutting, annealing, slitting, forming and welding.
Cut pieces can be made to your specific requirements.
Materials
It is woven in numerous materials including
plain and galvanised steel, aluminium, nickel, brass, copper,
phosphor bronze, monel and stainless steel which is the most
popular.
There are many grades of stainless steel. The points to consider
when choosing the most appropriate grade are corrosion resistance,
mechanical strength, operating conditions and temperature.
Type 304 and 316 listed below are two of the most popular
grades.
Type 304. This is an austinetic,
non magnetic, economical grade of stainless steel. It will
not rust under normal conditions and resists most oxidizing
acids. It is widely used in the food industry and is immune
to most organic chemicals, dyes and foods. It is an 18/8 stainless
steel, therefore 18% chromium and 8% nickel.
Type 316. This is similar to
type 304 but with the addition of molybdenum. It has a significantly
higher corrosion resistance making it suitable for use in
the presence of acetic acids also sodium and calcium brines.
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