Services
Home >> Services
Electrical Pre-Heat and PWHT of piping
Thermage Engineering Pvt Ltd is a trusted specialist in Electrical Pre-Heating and Post Weld Heat Treatment (PWHT) of piping, pipelines, and process lines for oil & gas, refineries, power plants, petrochemical, and heavy engineering projects. Our electrical resistance heating method provides uniform temperature distribution on pipe weld joints, elbows, flanges, and critical components. The process is performed using ceramic pad heaters, high-quality insulation, temperature recorders, and calibrated thermocouples to achieve precise heating and cooling cycles as per ASME Section VIII, B31.1, B31.3 and IBR standards.
Benefits of Electrical Pre-Heat & PWHT of Piping
Reduction of weld residual stresses
Prevention of hydrogen induced cracking
Improved ductility and toughness of weld joints
Hardness control within specified limits
Enhanced service life of piping systems
Compliance with ASME / IBR / client specifications
Electrical Pre-Heat and PWHT of Pressure Vessels
Thermage Engineering Pvt Ltd is a leading service provider for Electrical Pre-Heating and Post Weld Heat Treatment (PWHT) of pressure vessels, reactors, columns, heat exchangers, and critical fabricated equipment across India. We deliver precise and uniform heat treatment using modern electrical resistance heating technology to meet stringent project and code requirements. Pressure vessels operate under high temperature and pressure conditions; therefore, proper PWHT is essential to relieve welding residual stresses, control hardness, improve toughness, and prevent stress corrosion cracking. Our team follows approved procedures in accordance with ASME Section VIII Div.1 & Div.2, ASME B31.3, IBR, and client specifications.
Benefits of PWHT for Pressure Vessels
Reduction of residual stresses in thick sections
Improved mechanical and metallurgical properties
Hardness control within specified limits
Enhanced fatigue life and structural integrity
Compliance with ASME / IBR / third-party inspection
Electrical Heating of Structural Steel for Expansion
Thermage Engineering Pvt Ltd offers professional electrical heating solutions for structural steel expansion required during erection, alignment, modification, and maintenance of heavy industrial structures. This method is widely used to achieve controlled thermal expansion of beams, columns, girders, base plates, and other steel members where mechanical force alone is insufficient. Our electrical resistance heating technique provides uniform and localized heating using ceramic pad heaters, temperature controllers, and calibrated thermocouples to maintain the required temperature range without affecting the mechanical properties of steel.
Benefits
Uniform thermal expansion without distortion
Faster and safer structural alignment
No mechanical overstressing of components
Controlled process as per engineering procedures
Reduced downtime at project sites
Gas and Oil Combustion Heating PWHT for Pressure Vessels
Thermage Engineering Pvt Ltd specializes in Gas and Oil Fired Combustion Heating PWHT of pressure vessels used in refineries, petrochemicals, power plants, and process industries. This method is highly effective for large diameter, high thickness, and site-fabricated pressure vessels where electrical or furnace heating is not practical. Our combustion PWHT process delivers controlled heating, soaking, and cooling cycles using industrial burners, refractory insulation, temperature controllers, and calibrated thermocouples. The entire activity is performed as per ASME Section VIII, ASME B31.3, IBR, and client-approved procedures.
Benefits of PWHT for Pressure Vessels
- Uniform temperature distribution
Reduction of weld residual stresses
Improved ductility & toughness
Hardness control within limits
Prevention of stress corrosion cracking
Increased service life of equipment
Thermage Engineering Pvt Ltd is a leading PWHT Service Provider in India, offering professional Post Weld Heat Treatment, Stress Relieving, Pre Heating, Normalizing, Hydrogen De-Embrittlement, and Heat Treatment Solutions for all industrial sectors.