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WELD CONNECTIONS



 
WORLDWIDE CORROSION ENGINEERING
 
Exothermic Welding
 
Exothermic welding is a process, which makes it possible to connect two identical to none-similar conductors in different sizes and shapes. The most major type of this kind of connection is used in earthing networks and the connection is between copper conductors and steel plates. There is no need for heat or external in this method, the created junction is molecular and is very resistant to corrosion. Meanwhile, the destructive effects of ordinary welding, like tangible tensions or change in the shape of the metal due to the in temperature are not observed here.

In this method, the special connecting powder is melted and poured with the help of suitable detonator and connects two conductors to each other.


THE THERMITE WELD EFFICIENCY
 
 
A thermite connection becomes an integral part of the conductors. The termite connection is a fusion or molecular weld of virtually pure copper. The finished connection in the majority of cases sectional area of the conductors being welded and therefore:
1) Will not be affected by high current surges. Tests have shown that the electrical melt before the  thermite connection when subjected to short circuit current.

2) Will not loosen of corrode at the point of weld. There are no contact surfaces or mechanical pressures

3)Has a current carrying capacity equal to or greater than that of the conductors.

Other efficiencies are:                                  
Will not deteriorate with age.
Will withstand repeated faults.                                                                           
Has low labour costs.  5
Requires no special skills.
Can be checked for quality by visual inspection.                                 
Requires no external power or heat.
Maintenance saving as the welds are unaffected by oxidation and fault currents


Exothermic welding materials.
Connecting conductors via a high
temperature reaction between
aluminum and copper oxide in a
graphite semi-permanent mold,
no outside heat source required.
Low emission system.
Using a graphite filter to reduce the discharge of dust; for clean environments.
Cable to cable connection.
Type CC
Cable to steel (horizontal, vertical, pipe, cathodic protection) connection.
Type CS
A CX1 type connection. Cable to reinforcing bar connection.
Type CRE
Cable to railway connection.
Type CX
Cable to ground rod connection.
Type CR 


   
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