What Is a Tubular Heater Used For?
What Is a Tubular Heater Used For?
A tubular heater is an electric heating element used to transfer heat to air, liquids, surfaces, and industrial process equipment. Because tubular heaters can be manufactured in different shapes, sizes, materials, and electrical configurations, they are widely used in industrial heating applications.
Common applications include industrial ovens, air heating systems, drying equipment, water and liquid heating, tanks, molds, process machinery, packaging equipment, and customized industrial heating systems.
To understand the basic operating principle behind these applications, see our guide on how a tubular heater works.
What Is a Tubular Heating Element?
A tubular heating element is an electric resistance heater constructed from a resistance wire, electrical insulation, and a protective metal sheath.
When electrical current passes through the internal resistance wire, electrical energy is converted into thermal energy. The heat then passes through the magnesium oxide insulation and metal sheath before reaching the surrounding material or environment.
The basic construction allows the heating element to operate in different environments while providing reliable and controllable heat transfer.
How Does a Tubular Heater Generate Heat?
The working principle is based on electrical resistance heating. When voltage is applied to the resistance wire, current flows through the wire and generates heat because of its electrical resistance.
The generated heat is transferred through the insulation to the metal sheath. The sheath then transfers the thermal energy to the surrounding air, liquid, surface, or process material.
- Electrical power is supplied to the heating element.
- Current flows through the resistance wire.
- The resistance wire converts electrical energy into heat.
- Heat passes through the magnesium oxide insulation.
- The metal sheath transfers heat to the surrounding application.
Common Tubular Heater Applications
1. Industrial Ovens
Tubular heaters are widely used in industrial ovens to provide controlled heating for manufacturing and processing applications.
The heating elements can be arranged to provide the required heat distribution throughout the oven chamber. The heater shape, wattage, sheath material, and installation method can be customized according to the operating conditions.
2. Air Heating Systems
Tubular heating elements can be used to heat air and gases in ducts, heating chambers, drying equipment, and ventilation systems.
Finned tubular heaters are particularly useful for air heating because the fins increase the available heat transfer surface area.
Learn more about finned tubular heaters.
3. Water and Liquid Heating
Tubular heaters can be designed for heating water, oil, and other industrial liquids. The heater sheath material and watt density should be selected according to the liquid properties and operating conditions.
For direct immersion applications, an immersion heater may be suitable depending on the equipment design.
4. Industrial Tanks
Heating elements can be installed in tanks and vessels to maintain or increase the temperature of liquids and process materials.
The heater configuration should be selected according to the tank dimensions, heating medium, required temperature, and available installation space.
5. Drying Equipment
Tubular heaters can provide controlled heat for industrial drying systems. They can be used to heat air that circulates through drying chambers or process equipment.
Finned configurations can be useful when increased surface area is required for air-to-heater heat transfer.
6. Molds and Manufacturing Equipment
Tubular heating elements can be formed or installed in molds and manufacturing equipment to provide localized or distributed heating.
The heater dimensions, shape, wattage, and installation method can be customized to fit the equipment design.
7. Packaging Machinery
Tubular heating elements can be incorporated into packaging and processing machinery where controlled heat is required for sealing, forming, or other production processes.
8. Industrial Process Equipment
Many industrial processes require stable heating to maintain a specific temperature or change the physical properties of a material. Tubular heaters can be designed for these applications according to the required temperature, heating medium, and available installation space.
Why Are Tubular Heaters Suitable for Industrial Applications?
Tubular heaters are widely used because they provide flexibility in electrical specifications, dimensions, shape, and materials.
- Flexible shapes and configurations
- Customizable voltage and wattage
- Different sheath materials available
- Suitable for air, liquid, and surface heating
- Compact installation options
- Custom dimensions available
- Suitable for many industrial environments
Different Types of Tubular Heaters
Straight Tubular Heater
A straight tubular heater has a linear configuration and is suitable for applications where a straight heating path is required.
View our straight heating element.
U-Shaped Tubular Heater
A U-shaped tubular heater has two parallel heating sections connected by a return bend. This configuration can provide a relatively long heating path within a compact installation area.
View our U-shaped heating element.
Finned Tubular Heater
A finned tubular heater uses metal fins around the heating tube to increase the available heat transfer surface area. It is commonly used for air and gas heating applications.
View our finned tubular heater.
Factors to Consider When Choosing a Tubular Heater
Choosing the right tubular heater depends on the actual operating conditions of the equipment. Important factors include:
- Heating medium
- Required temperature
- Voltage
- Wattage
- Watt density
- Tube diameter
- Heated length
- Overall dimensions
- Sheath material
- Heater shape
- Terminal configuration
- Installation environment
If you need help selecting the correct heater configuration, see our detailed tubular heater selection guide.
How Does the Heating Medium Affect Heater Selection?
The heating medium has a major influence on the heater design. Air, water, oil, chemicals, and solid surfaces have different heat transfer characteristics and material compatibility requirements.
For example, air heating applications may benefit from finned tubular heaters, while liquid heating applications may require a suitable sheath material and carefully selected watt density.
The heater should therefore be selected according to both the heating medium and the required operating temperature.
Can Tubular Heaters Be Customized?
Yes. Tubular heating elements can be customized according to the electrical, mechanical, and thermal requirements of the application.
Customization may include:
- Tube diameter
- Heated length
- Overall dimensions
- Shape and bending configuration
- Voltage
- Wattage
- Sheath material
- Terminal type
- Terminal position
- Lead wire configuration
Customized designs are particularly useful when standard heating elements do not fit the available installation space or equipment requirements.
How to Improve Tubular Heater Performance
Correct heater selection and installation can help improve heating performance and service life.
- Select the correct voltage and wattage.
- Choose an appropriate watt density.
- Use a sheath material compatible with the heating medium.
- Provide sufficient airflow or liquid circulation where required.
- Match the heater dimensions to the available installation space.
- Use appropriate temperature control.
- Protect terminals from excessive heat and moisture.
Frequently Asked Questions
What is a tubular heater mainly used for?
Tubular heaters are mainly used for industrial air heating, liquid heating, surface heating, ovens, drying equipment, tanks, molds, process machinery, and other equipment that requires controlled electric heating.
Can tubular heaters heat water?
Yes. Tubular heating elements can be designed for water and other liquid heating applications when the sheath material, watt density, electrical specifications, and installation method are appropriate.
Are tubular heaters suitable for air heating?
Yes. Tubular heaters can be used for air and gas heating. Finned tubular heaters are especially useful when increased heat transfer surface area is required.
What is the difference between a tubular heater and an immersion heater?
A tubular heater describes the heating element construction and can be used in different configurations. An immersion heater is designed specifically for direct immersion into a liquid or other heating medium. The appropriate design depends on the equipment and application.
Can I order a customized tubular heater?
Yes. Tubular heaters can be customized according to required dimensions, voltage, wattage, sheath material, shape, terminal configuration, and other application requirements.
How to Choose the Right Tubular Heater
The best tubular heater depends on the heating medium, required temperature, electrical requirements, available installation space, heat transfer requirements, and operating environment.
Before placing an order, it is useful to confirm the required voltage, wattage, tube diameter, heated length, sheath material, heater shape, terminal configuration, and operating conditions.
For a detailed step-by-step guide, read our How to Choose a Tubular Heater: Selection Guide.
If you would like to understand the internal construction and operating principle before selecting a heater, see our guide on how a tubular heater works.
Get a Customized Tubular Heating Solution
TZ Heater provides customized tubular heating elements for industrial heating applications. Our heaters can be manufactured according to customer drawings, samples, dimensions, voltage, wattage, materials, and application requirements.
Whether you need a straight tubular heater, U-shaped tubular heater, finned tubular heater, or another customized configuration, our team can help develop a suitable heating solution.
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