It’s a great day in Tulsa
It’s a beautiful day in Tulsa Oklahoma. – April 4, 2018
Drop by booth #507 and check out our Orbital Tig and Induction Heating systems. We’ve got a beautifully reconditioned 300 amp Red-D-Arc Diesel welder for sale with special show pricing!!
Don’t forget to scan your badge for PennWell Drone Draw!!
www.pipelineenergyexpo.com – April 3-5, 2018
Importance of Preheating in Welding – Equipment Options
Preheating reduces the risk of cracking in weld metal and heat-affected zone (HAZ) by:
- Lowering the cooling rate of the weld – prevents formation of brittle weld metal/HAZ, allows more time for hydrogen to escape the molten weld.
- Removing moisture (hydrogen source) from the part.
- Reducing shrinkage by lowering the temperature differential.
Preheat or not?
The requirement and level of preheating for steel is determined by the relevant welding code and is dependent on the weld heat input, chemical composition of steel (carbon equivalent), thicknesses, diffusible hydrogen etc. Non-ferrous materials generally require preheat because of their high thermal conductivity.
Red-D-Arc staff at the Moncton, New Brunswick branch recently helped a customer save time and money repairing the world’s largest rock crusher through the use of induction heat. The hydraulic cylinder that operates the pressure plates used by the enormous rock crusher needed to be brought to a temperature of 500 °F and that temperature needed to be maintained for 3 full days. This was required in order to allow welders to repair the lifting tabs on the cylinder. Normally 3 workers would have used blow torches to heat the metal which would have taken 2 weeks or longer. Red-D-Arc Induction Heating Equipment allowed them to get the job done in less than half the time. Induction heating has many applications in construction, shipbuilding, hydro dam maintenance and bridge building. Red-D-Arc technicians are recognized in the industry for their innovative application of this technology, ready to meet any variety of customer challenges.
Ask us how induction heating can save you time and money on your next project.
Have a look at our entire selection of weld preheating equipment available for rent.