The most versatile of all electric heating elements, the tubular heaters are capable of being formed into virtually any shape & configuration, brazed or welded to any metal surface and can be cast into different metals. Depending on the application different tube diameters and different tube Sheath materials are available.
Heating of air requires an oxidized tube surface. The Commonly specified Sheath Materials are SS304, SS316, and SS316L & INCOLOY for high temperature applications. The range of ratings, sizes, materials and terminations available, makes the tubular heater adaptable to many industrial, commercial and Process applications. All wattages and voltages are possible as long as the resistance is within the fixed limits and the surface load is not exceeded.
Tubular heaters can be used in almost any application. They can be clamped to metal surfaces or inserted in machined grooves for conductive heat transfer. Or use a formed Tubular heater to provide consistent heat in any type of special application. Typical applications include Ovens, Duct heating, Tank heating, Hopper heating, Platen & dies, Castable heaters etc.
Known for its versatility, ruggedness and dependability, tubular heaters can virtually be factory-configured to suit a variety of industrial heating applications. Tubular elements are frequently regarded as the foundation of all heating elements. The basic design consists of a resistance wire/coil precisely centered in a metal sheath. This wire/coil is surrounded by magnesium oxide to provide efficient heat transfer from coil to heating medium. Diameters are varied to give customized design and adjustable watt densities for best performance and long life. Bending radius is carefully chosen so as to give optimum performance. Tubular heating elements perform heat transfer by all three modes (conduction, convection and radiation). They are available in both single ended and double ended designs.
The single-ended tubular design has both terminals at one end. The opposite end is sealed. Flexible lead wires are 12 in. (305 mm) crimp connected to the terminal pin and have silicone-impregnated fiberglass over-sleeves. Maximum watt density is up to 45 W/inch² while the maximum operating temperature is 1200°F, and hence INCOLOY and stainless steel sheaths can be used.
The double-ended design has round cross sectional geometry, is highly adaptable for bending, especially when bending is performed in the field. Double-ended tubular elements offer several assemblage of resistor coils and thermocouples inside one sheath. They have the ability to sense the heater’s internal temperature accurately every time, or offer three-phase capability in one element. Maximum watt density is up to 120 W/inch² while the maximum operating temperature is 1800°F, and hence INCOLOY and stainless steel sheaths can be used.
TECHNICAL SPECIFICATION:
| Sheath Material | Copper, Steel, 304 Stainless steel, INCOLOY, Titanium Other alloys as per application selection |
| Watt Density | Up To 120 W/in2 Or 47 W/cm2 |
| Sheath Length | Up To 10meter |
| Diameter | 6mm, 8mm, 11mm, 12.5, 13.7mm, 14.5mm, 16mm and 18mm |
| Element clamp | Customized |
| Mounting brackets | Customized |
| Termination Option | Single-ended and Double-ended design |
| End Seal Options | Teflon, Silicon Rubber, Epoxy, and Cement. |
Electric tubular heaters fits almost every industrial heating applications ranging from immersion to air heating that requires temperatures of 1380°F. They are made using high quality alloys to minimize physical stress and offer high efficiency. Used to heat solids, liquids and gases.
| Material | Application |
| Copper | Water, Oil, Grease |
| Steel | Alkaline cleaning solutions, Tars, Asphalt or air heating |
| Stainless Steel | Corrosive liquids, food processing equipment, Radiant heating |
| Incoloy | Cleaning and degreasing solutions, Corrosive liquids |
| Inconel | Plating and pickling solutions, acid |
| Titanium | Corrosive liquids |
