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Pin Welders

99% of the Stud Welding completed for Field Heat Treating purposes is Capacitor Discharge Pin Welding.  Regularly 12Ga Pins are used to fasten the Flexible Ceramic Heaters to different work pieces.  3” 12 Ga Mild Steel pins are the most used item for this purpose.  Blunt Point pins have become the new industry standard for safety purposes, although some people still prefer the regular point (sharp point) pins.

The Drawn Arc Stud Welding process is used in conjunction with Insultwist Pins to secure the insulation to the interior of the furnace.

Description

Pin Welders

99% of the Stud Welding completed for Field Heat Treating purposes is Capacitor Discharge Pin Welding.  Regularly 12Ga Pins are used to fasten the Flexible Ceramic Heaters to different work pieces.  3” 12 Ga Mild Steel pins are the most used item for this purpose.  Blunt Point pins have become the new industry standard for safety purposes, although some people still prefer the regular point (sharp point) pins.

These Pins are available in other alloys depending on the base metal of the work piece.  In situations where the PWHT is required at higher temperatures or in PWHT furnaces that are susceptible to multiple heat cycles Stainless Steel pins are used.

4” – 6” 10Ga stainless steel pins are also used for insulating PWHT furnaces, although Drawn Arc Stud Welding of Insultwist Pins has proven to be much more durable.

This process uses a powerful capacitor to store energy at a specific voltage determined by stud size and material. When a weld is initiated, this energy is “discharged” through an “ignition tip” at the base of the stud, creating an instantaneous arc which creates a pool of molten metal in the work piece. The operator of the welding gun keeps tension on the stud which sinks into the work piece, resulting in a permanent bond as the molten material solidifies… all in fractions of a second!

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