Induction Preheating Before Welding For Stress Relieving

induction preheating before welding pipeline heater

Induction Preheating Before Welding For Stress Relieving Heater Why use Induction Preheating Before Welding ?Induction preheating can slow down the cooling rate after welding. It is beneficial to escape the diffused hydrogen in the weld metal and avoid hydrogen-induced cracks. At the same time, It also reduces the welding seal and heat-affected zone hardening level, … Read more

Induction Preheating Welding Steel Pipe

Induction Preheating Welding Steel Pipe With High Frequency Heating System

Objective To preheat a steel pipe to 500ยบF (260ยบC) before welding.
Material Steel shaft assembly 5โ€ to 8โ€ OD (127-203.2mm) with a 2โ€ย (50.8mm) heat zone.
Temperature 500ยบF (260ยบC), if higher temperatures are required, heat timeย can be increased.
Frequency 60 kHz
Equipment โ€ข DW-HF-60kW induction heating system, equipped with aย remote workhead containing eight 1.0 ฮผF capacitors for aย total of 8 ฮผF.
โ€ข An induction heating coil designed and developedย specifically for this application.
Process A multi-turn two position channel โ€œCโ€ coil, adjustable on aย busbar is used to heat the desired heat zone. The coil isย adjustable to fit various diameter pipes. The shaft is rotated inย a fixture and heated for 3 minutes to achieve a temperature ofย 500ยบF (260ยบC).
Results/Benefits Induction heating provides:
โ€ข Preheating prevents shock to shaft which eliminatesย cracking in the welding phase.
โ€ข Hands-free heating that involves no operator skill forย manufacturing.
โ€ข Even distribution of heating between the shank and the ย sleeve.

induction preheating welding steel pipe

 

 

 

 

 

 

induction preheating steel pipe before welding

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