Monday December 17 , 2018
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Materials

Most cable tray systems are fabricated from a corrosion resistant metal (low-carbon steel, stainless steel or aluminum) or from a metal with a corrosion resistant finish (zinc or epoxy). The choice of material for any particular installation depends on the lnstallation environment.


Steel
Steel cable tray are fabricated from structural quality steels using a continuous roll-formed process. Forming increases the mechanical strength. Themain benefits of steel cable tray are its high strength and lowcost. Disadvantages include high weight, low electrical conductivity and relatively poor corrosion resistane.
The rate of corrosion will vary depending on many factors such as the environment, coating or protection applied and the composition of the steel. This type offers finishes and coatings to improve the corrosion resistance of steel. These include pre-galvanized, hot dip galvanized (after fabrication), epoxy and special paints.

Aluminum
Cable trays fabricated of aluminum are often used for their high strength-to-weight ratio, superior resistance to certain corrosive environments, and ease of installation. They also offer the advantages of being light weight and maintenance free, and since aluminum cable trays are non-magnetic, electrical losses are reduced to a minimum.
The unusual resistance to corrosion, including weathering, exhibited by aluminum is due to the self-healing aluminum oxide film that protects the surface. Aluminum’s restistance to chemicals in the application environment should be tested before installation.


Stainless steel
Stainless steel offers good yield strength and high creep strength, at high ambient temperatures. Stainless steel cable tray is roll-formed fromAISI Type 304 or AISI Type 316 stainless steel. Both are not magnetic and possess high strength when cold rolled or formed. Type 304 is resistant to dyestuffs, organic chemicals, and inorganic chemicals at elevated temperatures. Higher levels of chromium and nickel and a reduced level of carbon serve to increase corrosion resistance and facilitate welding. Type 316 includesmolybdenum to increase high temperature strength and improve corrosion resistance, especially to chloride and sulfuric acid. Carbon content is reduced to facilitate welding.

 

GRP
Pultrusion is an industrial technique wich permits continuous production of profiles in composit materials. this process allows to build up of different profiles with various cross sections andvariable thicknesse and strength. the length of the profiles can be unlimited.

Resistant to corrosion saves maintenance change.
GRP profiles life is more than 40 years.

Non-conductive insulation material , uv protection. Fire retardant and resistant to temperatures from -80 to +130C . And no need the earthing.

Four times lighter than steel and 30% lighter than aluminum easy transportation, handling and no sharp edges.

Self extinguishing without toxic fumes, zero halogen and low thermal conductivity answers to the most demanding international fire standards.

 

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