First, the concept of the heating element heats the pipe (heat pipe) is a metal tube housing (including stainless steel, copper), along the central axis of the tube uniform spiral heating alloy wire (nickel-chromium, iron-chromium alloy) which fill the gap pressure magnesium sand real good thermal insulation properties, both ends of the nozzle with a silicone seal, the metal sheathed heating elements can heat the air, metal molds and various liquids. Metal tubular electric heater elements (heating tube), is placed in a metal tube heating element, and close the gap portion is filled with a good heat resistance, thermal conductivity and insulating crystal magnesium oxide powder, in the treatment by other processes a. It has a simple structure, high mechanical strength, high thermal efficiency, safety and reliability, ease of installation, long life and other characteristics. Widely applicable to various saltpeter tank, tank, tank, acid tank, fusible metal melting furnace, air furnace, drying furnace, oven, hot die and other devices. Heating pipe is designed to convert electrical energy into heat energy electrical components, because of its cheap, easy to use, easy to install, no pollution, is widely used in a variety of heating applications, the current production of electric components manufacturers have a lot of general design life 4000 more than an hour, far infrared radiation heating elements can have a lifespan of five heating seasons. Second, the industrial use of high-performance electric heating tube Features: 1, with good thermal efficiency, even heating; 2, high temperature, corrosion; 3, has a good safety performance; 4, long life: the main technical indicators by JB / T2379-93 "metal tubular heating elements," and JB / T 4088-99 "Daily tubular heating elements" execution, product life ≥4000h. Third, calculate the heating tube heat regulator can be used by changing the input voltage and current to change the amount of heat. Heat proportional to the square of the voltage, proportional to the square of the current. Matters voltage into the original 1/2, 1/4 of the heat into electric current into the original 1/2, 1/4 of the heat also becomes four, heating pipes should use Note: 1, element allows work under the following conditions: A. Air relative humidity less than 95%, non-explosive and corrosive gases. B. Rated working voltage should not exceed 1.1 times the shell should be effectively grounded. C. Insulation resistance ≥1MΩ Dielectric strength: 2KV / 1min. 2, the heating pipes should be prepared to locate fixed, effective heating area must be completely immersed in the liquid or solid metal, non-air burning. Found the pipe surface scale or knot of carbon, should be cleaned and then, in order to avoid IMPACT heat and shorten life. 3, heat fusible metal or solid nitrate, alkali, bitumen, paraffin, etc., should be to reduce the use of voltage, to be melted medium to rise to the rated voltage. 4, the heating element should cross the air evenly, so that a good heat dissipation element, so that air can flow through the heated sufficiently. 5, when the heating nitrate consider security measures to prevent explosion. 6, the wiring should be placed on the outside part of the insulation layer to prevent corrosive, explosive material, in contact with water; lead wire should be able to withstand long-term temperature and heating load wiring parts, wiring screw fastening should avoid excessive force. 7, the components should be stored in a dry place, if the issues long-term placement when the insulation resistance is less than 1MΩ, available at about 200 ℃ oven drying, or lower voltage ohmic heating, insulation resistance until recovery. 8, electric tube outlet end of magnesium oxide powder in place to avoid the use of water infiltration by contaminants and prevent leakage accidents.