1, choose high quality raw materials production of seamless cold drawn heat-resistant steel tube (the highest temperature is 1200 degrees) manufacturing2, using resistance wire inner core U axial end welding way3, resistance wire and ceramic basically no shielding, resistance wire and furnace temperature difference is small4, the highest working temperature of 1000 degrees or 1200 degrees5, the company produced the biggest advantages of radiant tube seamless cold drawn, thin-walled heat-resistant steel pipe (cr25ni20si2 cr25ni20si2 1 or 0), the product of thermal radiation is 10% higher than similar products6, the use of more than 8000 h of radiant tube using electrothermal alloy material should have high resistivity, high electric conversion.Because of the radiation tube placed in the casing, the heat transfer process and normally open