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Welding Preheating & PWHT with Induction Heating

Improve Weld Quality and Safety with Precision Induction Preheating and Post-Weld Heat Treatment

Induction heating offers a fast, accurate, and energy-efficient solution for welding preheating and post-weld heat treatment (PWHT) across various industrial sectors. Whether you're working on pipeline welding, pressure vessel fabrication, or offshore structure maintenance, our advanced induction heating machines ensure uniform temperature control and superior metallurgical performance.

Why Choose Induction Heating for Welding Preheat & PWHT?

Traditional heating methods such as flame torches or resistance blankets are often slow, inconsistent, and unsafe. In contrast, induction heating systems offer a modern, non-contact solution with precise temperature control, rapid heat-up time, and high safety standards.

Key SEO-optimized benefits:

· Uniform and localized heat application for weld zones

· Safer alternative to flame-based preheating

· Suitable for both in-shop and on-site welding operations

· Compliance with ASME, AWS, ISO welding standards

· Available in portable, mobile, cabinet, and integrated induction heating system designs

Recommended Induction Heating System Configurations

Custom Induction Coils & Heating Accessories

We provide a complete range of custom induction coils and accessories tailored to your welding application:

· Flexible cable coils for pipe circumference heating

· Pancake coils for flat plate or flange welds

· Internal coils for ID heating (e.g., nozzles)

· Multi-channel thermocouple sensors

· HMI or PLC-controlled temperature regulation

· Thermal insulation blankets, quick connectors, foot pedal switches

Need a special coil shape? We offer coil customization to match your part geometry and process requirements.

Benefits of Induction Welding Preheating and PWHT

· Rapid heating (30–60°C per minute typical ramp-up)

· Accurate soak temperatures up to 900°C

· Better control over cooling cycles for residual stress relief

· Reduced weld cracking and improved structural integrity

· Increased operator safety – no exposed flame or hot surfaces

· Lower energy consumption compared to resistance or gas heating

Applications of Induction Heating in Welding

Our systems are trusted in various industries requiring controlled heat treatment during welding, including:

· Oil & Gas pipeline construction

· Power plant maintenance (boilers, turbines)

· Shipbuilding and offshore platforms

· Wind tower welding

· Structural steelwork & bridge welding

· Petrochemical and refinery shutdowns

Optimized for Industrial Use

Whether you need a high-frequency induction heating machine for precision work or a medium-frequency system for deep heat penetration, we provide the ideal setup with:

· Output power range: 4.5kW to 680kW

· Flexible voltage input options (3-phase, 380V/415V/480V)

· Multiple control modes: manual, semi-auto, fully programmable

· Real-time monitoring & data logging via HMI or PLC

Contact Us for a tailored welding preheat or PWHT solution
We design and manufacture high-performance induction heating systems with industry-specific coil configurations and accessories. Tell us your application — we’ll build the system around it.

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· Induction heating machine for welding

· Induction preheating system

· Post-weld heat treatment equipment

· Portable induction heating for pipelines

· Industrial heat treatment solutions

· Custom induction coils for welding

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· PWHT equipment supplier

Simple version：

Welding Preheating & Post Weld Heat Treatment (PWHT)

Precision Heating for Weld Integrity and Structural Safety

Welding heavy-duty metal components often leads to residual stress and thermal shock. Without proper preheating and post-weld heat treatment, weld joints may crack, deform, or lose strength — especially in pipelines, offshore structures, and pressure vessels.

Why Induction Heating?

Induction provides fast, uniform, and controlled heat directly into the weld zone without flame or contact. It reduces hydrogen-induced cracking, improves metallurgical bonding, and ensures the weld area meets industry safety codes.

Recommended System Types:

· Mobile induction heating units: ideal for on-site pipeline or field welding

· Cabinet-type systems: for workshop-based fabrication or heavy components

· Integrated control: programmable ramp-up, hold, and cooling cycles

Custom Coils & Accessories:

· Flexible wrap-around coils

· Temperature sensors (thermocouple or infrared)

· Thermal insulation blankets

· Multi-point temperature control boxes

· Remote or touchscreen controllers

Key Benefits:

· Precise temperature targeting (preheat or PWHT)

· Consistent weld quality and reduced rework

· Flame-free, safe operation

· Easy-to-deploy portable options for field work

Common Industries:

· Oil & Gas

· Power Generation

· Shipbuilding

· Construction & Infrastructure