Brazing Steel To Steel Pipe With Inductionย
Objective: To braze O-ring Face (ORFS) sleeve or male connector to a steel tube.
Material
โข Steel tube, 1 inch (2.54 cm) OD
โข O-ring Face Seal sleeve and a male connector fittings
โข Preform braze rings
โข White SureFlow flux
โข Steel support mandrel
Temperature 1300 ยบF (704 ยบC)
Frequency 200 kHz
Equipment
โข DW-UHF-20KW induction heating system, equipped with a remote workhead containing two (2) 1.5 ฮผF capacitors (for a total of 0.75 ฮผF).
โข An induction heating coil designed and developed specifically for this application.
Process A four-turn 2.75 inch (7.0 cm) ID helical coil is used for heating both the steel tube and the ORFS sleeve or the ORFS male connector. This coil is designed to braze either the sleeve or male connector to the tube. The parts to be brazed are assembled with flux and heated for 45 seconds. Pressure is applied to the tube to make sure it is inserted fully into the fittings as the braze ring flows.
Results/Benefits Advantages :
โข Large Inner diameter of coil allows for easy loading and unloading of parts
โข With efficient energy coupling of the coil to the fittings overheating is avoided.