Induction Heating & Preheating

Induction heating and preheating equipment heats metal by inducing current in the part itself, without a flame or a hot element in contact with it. Seven Star LLC lists two products in this category for buyers in Oman, and they serve different jobs: a Miller induction heating system for weld preheating and stress relieving, and an SKF induction bearing heater for mounting bearings. Other models and accessories can be sourced on request as the range grows.

Induction preheating for pipe and plate welding

Preheat slows the cooling of the weld zone and lets hydrogen escape, which lowers the cracking risk in thick sections and hardenable steels such as chrome-moly grades. An induction system wraps flexible cables or blankets around the joint and holds the temperature from thermocouple feedback. The heat is generated in the pipe wall, so it is even through the thickness, the coil stays comparatively cool and welders can work beside it. Recorded temperature data supports the documentation that power, refinery and pipeline projects in the GCC require.

Induction bearing heaters

A bearing heater expands the inner ring so the bearing slides onto the shaft for a shrink fit. Compared with oil baths or open flames, heating is controlled and clean.

What to send with your inquiry

For weld heating: pipe diameter, wall thickness, material, target temperature, number of joints heated at once and supply voltage. For a bearing heater: bearing bore, outside diameter, width and weight.