SigmaTherm Pre and Post Weld Heat Treatment Induction Heaters are designed to cater the Pre and Post Heat Requirement for Low Alloy Steel in Critical applications, P91 materials in Heavy Fabrication, Power Plants,Pipeline Industries, Construction Equipements etc. Our Pre-Post Weld Heat Treatment SigmaTherm Induction Heater uses the induction process to induce heat directly into the metal. This process is very safe as no direct flame or heat is generated, radiated. This process is very efficient & fast as minimal or no set up time is lost. As heat is induced directly in the job, heating rate can be very fast for Pre Heating applications.