A special type of wire mesh, sometimes referred to as Dutch weave filter cloth, having a greater number of finer wires in the shute direction. Filter cloth is woven in both plain and twill weave patters. It is normally rated by the size particle it will retain, either as the absolute micron rating or the nominal micron rating, expressed in microns. Being a relatively heavy or thick mesh, it is much stronger than a comparably rated square weave mesh.
A series of filter cloth specifications developed by UNIQUE Wire Weaving for the purpose of filtering in the very fine range (Micronic Filter Cloth down to 10 microns). Each mesh is rated by its retention in microns as determined by the bubble point test. Almost like sheet metal, it has the bending properties and thickness of thin cardboard.
A special grade of stainless, Carpenter 20 was developed for improved resistance to corrosion by sulfuric acid, but is widely used throughout the chemical industry. It provides excellent resistance to sulfuric acid at up to its boiling point in concentrations from 10-40%.
A nickel-molybdenum-chromium alloy with tungsten added that results in excellent corrosion resistance in a wide range of severe environments including wet chlorine gas, hypochlorite, and chlorine dioxide solutions. The alloy is especially resistant to pitting and crevice corrosion and has good resistance to sulphuric, phosphoric, acetic, and nitric acids. Alloy C-276 is an improved version of alloy C in that it has vastly improved fabricability and resists the formation of grain-boundary carbide precipitates during welding. Alloy C-4 has outstanding high temperature stability, while for even better overall corrosion resistance, alloy C-22 excels in pitting resistance.
A chromium-nickel-tungsten-cobalt alloy with good ductility that has good oxidation and corrosion resistance as well as high strength properties at elevated temperatures.
Monel, a nickel-copper alloy, is one of the most widely used nickel alloys. It offers somewhat higher strength than unalloyed nickel, does not sacrifice ductility, and resists corrosion in a broader range of environments including sulfuric acid, hydroflouric acid, brines, and water.
Commercially pure or low alloy- nickel is useful in chemical processing due to its resistance to various chemicals including caustic alkalies, in electronics due to its high electrical conductivity, and heat exchangers due to its thermal conductivity and ductility.
Platinum has an unusual combination of properties that include high melting point, oxidation resistance, resistance to chemical attack, and good electrical conductivity, such that it fulfills a wide range of industrial requirements. Platinum is often alloyed with Iridium, Rhodium, or Palladium to obtain greater hardness, strength, and electrical resistivity than possessed by platinum alone, although generally not over 20 percent.
Approx. Micron Retention
Wire Mesh (Wires/In.)
Type Weave
Typical Cloth Thickness
Stock Width
Notes
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is an austenitic, non-magnetic, thermally nonhardenable economical stainless steel. It resists most oxidizing acids, withstands all ordinary rusting, and is immune to foodstuffs, sterilizing solutions, most organic chemicals and dyestuffs, and a wide variety of organic chamicals, but resists poorly halogen acids.
(UNS:S30403)
or low carbon, minimizes the problem of carbide precipitation during welding, permitting use in the as-welded condition.
is similiar to Type 304 but distiguished primarily by the addition of molybdenum which significantly increases it's corrosion resistance. Type 316 can withstand corrosive attack by sodium and calcium brines, hypochlorite solutions, phosphoric, sulfurous, and acetic acids, and the hostile environment oft the body when used for implant.
(UNS:S31603)
or low carbon, exhibits properties similar to 316, except offers better weldability.
A refractory metal with almost complete immunity to attack by acids and liquid metals. Tantalum equals glass in resistance to acids, conducts heat better than the nickel alloys, and has an extremely high melting point. It has been used in chemical equipment, heat exchangers and elements, surgical implant, and electronic devices.
Titanium is most commonly woven with commercially pure (C.P.) Grade I wire. Unalloyed titanium shows outstanding resistance to salt water, is virtually immune to atmospheric corrosion, and is highly resistant to metallic salts, chlorides, hydroxides, nitric and chromic acids, organic acids and dilute alkalies. Titanium has a very high strength to weight ratio. Titanium wire can be specified either "clean" or "black", referring to whether the wire drawing lubricants are removed from the surface. It is necessary to use lubricants / oxides (commonly molybdenum disulfide) to draw the wire through diamond dies due to its tendency to gall.
