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High-flux flange immersion heaters

High-flux flange / in-line heaters enable you to exceed the limits to save space, increase productivity and work at very high temperature

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The world is changing, and the industry of the 21st century faces new challenges!

  • Productivity
  • Energy saving & environment protection
  • Cost reduction

CETAL has now more than 25 years experience on this technology!

Reliability and robustness are key drivers for our engineers.

Smaller equipment

Less space, weight, heat loss, cost saving, reduced thermal inertia

Increased productivity

More heat in less time for shorter production cycles

High temperature

Longer heater life in extreme conditions, very high temperatures

Product overview

  • Customized product
  • Wire Ni-Cr 80/20
  • W/cm² : 10 à 200 W/cm²
  • Voltage: 24 V /48 V (DC), usually 110 to 750 V AC/DC, max medium voltage
  • Operational temperature: from -270 °C to +1000 °C
  • Pressure: up to 300 bars, higher on request

Advantages

  • Temperature gradient improved by 10 compared to Magnesia
  • Heating 100% homogeneous (Straight wire)
  • Ring-shaped flow improves heat transfer up to 100 W/cm² and more
  • Available in ATEX/IECEx
  • Medium voltage
  • No leakage current at high temperature
  • Specific tube sheath to increase heat transfer coefficient and heat surface
  • Reduced heater weight

Liquids, gas and solids

Water

  • Stagnant water, max load 8-12 W/cm², material: copper, 321, 316L
  • Circulating water, max load 10-16 W/cm², material: copper, 316L, inc 800, inc 825
  • Boric water, max load 8 W/cm², material: 316L
  • Boiler water, max load 8-16W/cm², material: 316L, inc 800, inc 825
  • Chlorated water, max load 6 W/cm², material: inc 825
  • Sea water, max load 3.5-6 W/cm², material: inc 825, inc600
  • Demineralized water / deionized / distilled / Softened,max load 4-6 W/cm², material: 316L, inc 800, inc 825
  • Domestic hot water, max load 4-8 W/cm², material: copper, 316L, inc 825
  • Caustic water (2%, 10%, <30%, 70%), max load 2.3-7W/cm², material: 316L, inc 825, inc 600

Oil

  • Machine oil SAE 10, 30, 40 & 50, max load 2.0-3.5 W/cm², material: 316L
  • Mineral oil , max load 0.5-3.5 W/cm² acc to temp, material: 321, 316L
  • Lube oil, max load 2.3 W/cm², material: 321, 316L

Acid & corrosive fluid

  • Acetic acid, max load 6W/cm², material: 316L, inc 825
  • Boric acid, max load 6W/cm², material: inc 825
  • Chloric, hydrofluoric, nitric, sulphuric acid, max load 1.5W/cm², material: teflon coat
  • Boric acid, max load 6W/cm², material: inc 825
  • Alkaline bath, max load 6W/cm², material: 321 (no corrosive compound), 316L
  • Phosphate bath, max load 4W/cm², material: 316L,inc 825

Glycol

  • Ethylene glycol,Propylene glycol, 4 to 8 W/cm² acc to concentration, material: 321, 316L

Others

  • Asphalt, tar, and other heavy or highly viscous compounds, max load 0.5 -1.5W/cm², material: 316L
  • Milk, max load 0.3W/cm², material: 316L

Gas

  • Air, max load 0.1 -8W/cm² acc. to sheath temp., material: 321
  • Circulating air, max load 0.1 -8 W/cm² acc. to sheath temp., material: 309
  • Natural gas, max load 0.1 -8 W/cm² acc. to sheath temp., material: 321, 316L
  • Argon, nitrogen, W/cm² acc. to sheath temp., material: 321, 316L, inc 825, inc 600
  • Propan, butane, W/cm² acc. to sheath temp., material: 321, 316L
  • Oxygen, hydrogen, W/cm² acc. to sheath temp., material: 316L

Solids

  • Mass of steel or stainless steel (bolt)

Technical description

High flux heating elements

  • Heating element tube diameter according to application:
    • High flux heating element : 8.5, 16, 19 mm
    • Bolt heater: 10.7, 11.7, 12.2,15.7, 17.7, 19.7, 21.6, 24.6, 29.6 mm
  • Tube material: Inox (321, 316L, 309), Incoloy 800 et 825, Inconel 600
  • Wire Ni-Cr 80/20 (Max 1100°C on wire)
  • Straight shape: possibility to bend only in cold part, max angle 90°
  • Electrical connections on the same side 1Ph or 3 Ph.
  • Enable to have circular heat exchange in case of circulation heater
  • Temperature control can be done by a removable thermocouple in a sleeve located in the heart of the heater.
  • High conductivity of boron nitrid (temperature gradient from 4 to 5°C) between wire and tube
  • Corrugation possible (tube thickness ~2 mm) , heat exchange surface increased/speed (Re and Prandtl number)

Benefits and processes

Smaller equipment

 

  • Complete system cost reduction (especially when vessel with high pressure (DESP), insulation)
  • Space saving and easier to handle
  • Weight saving
  • Temperature loss reduction (surface minimized)
  • Easier handling for installation
  • Inertia reduced, better temperature control accuracy

Liquid heating

Improved heat transfer (up to 100W/cm²) thanks to ring-shaped vessel to reduce the size of the heating system: corrosive, polluting or thermal fluid heating / high power pressure system / high power system / Steam super heater

Braking resistors

Circulation heater for offshore platforms

Flange immersion heaters

Reduce the size of highpower flange immersion heaters while ensuring good heat transfer. For tank heating.

Increased productivity

  • More heat in less time for shorter production cycles

Bolt Heaters

Bring a lot of heat in the drilled bolt to reduce the maintenance cycle time (tightening and untightening of the nut.)

Matrix Heating

Bring a lot of heat in the matrix to reduce the cycle time in comparison to usual cartridges

Mold Heating

Bring a lot of heat in the mold for specific thermoforming process (Aeronautics, Automobile) to reduce the process cycle time

Ignition point

Ignition of inflammable gas using small equipment

High temperature

  • High temperature process, up to 1000°C
  • Temperature gradient improved by 10 compared to Magnesia

Gas heating

Heat process requiring high temperature such as bench tests with high air flow (aeronautics …) / chemical processes (Polymerization)

  • CETAL high-flux flange immersion heaters