Industrial Electric Tubular Heater Heating Elements (Custom Formed)

Hongtai tubular heaters are versatile electric heating sources designed for immersion, air, and conductive heating applications. Engineered with precision helical wound nickel-chrome resistance wire and high-purity magnesium oxide (MgO) compaction, these elements provide maximum heat conductivity and dielectric strength.

• Sheath Materials: Copper, Steel, Stainless Steel (304, 316, 321), Incoloy 800.

• Diameter Options: Standard 6.4mm to 25mm (Custom sizes available).

• Max Temperature: Up to 800°C (Incoloy 800 sheath).

• Voltage Rating: 12V to 550V (Customizable).

• Terminal Types: Threaded stud, screw terminal, quick connect, or lead wire.

• Formability: Available in straight lengths or factory-formed shapes (U, W, M, Coil).

Various Tubular Heater shape , you can tell us directly the figure No.

 

How to order ?

Pls provide this informations:
1.Vottage :380V,240V, 220V,200V,110V and other can be customized.

2.Wattage :80W,100W,200W,250W and other can be customized.

3.Size: length*Diameter.

4. Quantity

5. Pls check the below heater shape simple drawing, and choose the right one you want.

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SECTION 1: Specs

Technical Specifications & Dimensions

The following table outlines standard production capabilities. Hongtai Engineering offers design assistance for special requirements outside these ranges.

Parameter	Standard Specification	Customizable Options
Sheath Diameters	6.4mm, 8mm, 10mm, 12mm, 16mm	14mm, 18mm, 20mm, 25mm
Max Sheath Length	6000mm – 7000mm (Dia dependent)	Extended lengths per request
Voltage Range	120V, 240V, 480V	Max 550V (3-Phase available)
Wattage Tolerance	+5% / -10%	Precision tolerance available
Resistance Tolerance	+10% / -5%	–
Cold Pin Connection	Fusion Welded	Integral cold pin
Insulation Material	High Purity Magnesium Oxide (MgO)	–
Resistance Wire	Precision Helical Wound Ni-Cr	–

Terminal & Mounting Options

• Type 1: Threaded Stud (Standard) – #10-32, #8-32, or Metric M4/M5.

• Type 2: Screw Terminal with Ceramic/Mica Insulator.

• Type 3: Quick Connect (Spade) – 90° or Straight.

• Mounting: Bulkhead fittings (hex or round shoulder bushings) available for tank wall installation.

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SECTION 2: Technical Details

Industrial Applications

Tubular heaters are the foundational component for various heating assemblies, including screw plug immersion heaters, flanged heaters, and circulation heaters.

1. Liquid Immersion: Water, oil, molten salts, and chemical solvents.

2. Process Air Heating: Forced air ducts, convection ovens, and drying cabinets (often finned for efficiency).

3. Conductive Heating: Clamped to tank walls or cast into metal (aluminum/lead) for platens and packaging machinery.

4. Radiant Heating: Used in infrared heating applications for curing and heat treating.

 

Sheath Material Selection Guide

Selecting the correct sheath material is critical for element longevity and preventing corrosion.

Material	Max Temp	Primary Application Environment
Copper	150°C	Clean water, non-corrosive liquids, hot water storage.
Mild Steel	400°C	Oil immersion, degreasing solutions, heat transfer fluids.
Stainless Steel 304	650°C	Process water, food processing, sanitation, mild corrosives.
Stainless Steel 316	650°C	Corrosive liquids, acids, marine environments.
Incoloy 800	800°C	High-temp air heating, radiant heating, clamp-on applications.

Installation & Wiring Considerations

• Cold Zones: Elements must be designed with appropriate unheated lengths (cold zones) at the terminal ends to prevent terminal box overheating and ensure safety.

• Moisture Protection: For high-humidity environments, hermetic seals (ceramic-to-metal) or silicone barriers are recommended to protect the hygroscopic MgO insulation.

• Wiring: Threaded terminals utilize ceramic or mica insulators to ensure a positive, isolated connection.

 

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SECTION 3: FAQ

1.  Q: What information is required to get a quote?

     A: To provide an accurate quote, please specify:

1. Sheath diameter and material;

2. Voltage and Wattage;

3. Overall sheath length and Cold zone length;

4. Bending formation (drawing preferred) or straight length;

5. Termination type36.

Q: Can you manufacture heaters with custom bending?

A: Yes. While we offer standard U, W, and M shapes, Hongtai engineering can custom form elements to virtually any configuration required for your machinery or tank geometry37373737.

Q: What is the difference between SS304 and SS316 sheath materials?

A: SS304 is the industry standard for general water and food applications. SS316 contains molybdenum, offering superior resistance to pitting and corrosion, making it suitable for more aggressive chemical environments or saline solutions38.

FOR MORE INFORMATION:

The 2026 Engineering Guide to Tubular Heaters: Selection, Customization, and Efficiency