The purpose of the coil heater is nothing more than air dry burning, heating of molds and mechanical equipment, heating of water, heat transfer oil, etc. How to choose 304 for its outer casing? This depends on the customer's heating medium and use.
First, how to choose the hot runner heater shell?
1, in terms of performance,
(1) Focus on high temperature resistance, 304 stainless steel: below 500 °C; 321 stainless steel: below 600 °C; 2520 stainless steel below 850 °C,
(2) Focus on corrosion-resistant, 316 stainless steel tube, titanium tube, Teflon sheath tube, select the appropriate tube material according to the acid-base solution,
(3) Focus on pressure resistance, common pipe wall thickness 0.8mm: resistance to 10 kg pressure, thick-walled seamless steel pipe,
2, from the use,
(1), liquid heating,
1 water heating, drinking, bathing: 304 stainless steel, heat exchange, cleaning: iron, 201 stainless steel, 304 stainless steel;
2 oil heating, iron, 201 stainless steel, 304 stainless steel;
3 acid-base solution, 316 stainless steel, titanium tube, Teflon.
(2) Dry air,
1 dry environment, iron, copper, stainless steel;
2 air is moist, stainless steel.
(3) Insert and type heating of molds and mechanical equipment,
1304 stainless steel is the most widely used.
First, the electric coil heater shell material type?
1, from the structure,
(1) Seamless steel pipe
(2) welded pipe
2, from the material,
(1) Stainless steel, 201/304/316/321/2520 (310S) stainless steel
(2) Carbon steel (#10 iron)
(3) T4 copper, brass, copper
(4) Titanium steel