Recommended maximum watt densities and medium for different materials about tubular heater
Sheath Material | Maximum Watts/cm2 | Medium |
Copper | 7 W/cm2 | Water, weak acid liquid |
Copper | 2.5 W/cm2 | Food oil, lubricating oil, hydraulic oil |
Stainless Steel 304-316 | 11 W/cm2 | Water, weak acid liquid |
Stainless Steel 304-316 | 2.5 W/cm2 | Food oil, lubricating oil, hydraulic oil |
Stainless Steel 304-316 | 5 W/cm2 | Still air |
Stainless Steel 304-316 | 5.5 W/cm2 | Flow rate is not low 6m/s air |
Stainless Steel 304-316 | 13 W/cm2 | cast in aluminum or iron |
Incoloy | 10 W/cm2 | Still air |
Incoloy | 11 W/cm2 | Flow rate is not low 6m/s air |