Before use, check whether the ground wire is connected ; 

To often check and repair the electric heating pipe, if there is damage, it is best to replace the electric heating pipe ; 

Pay attention to check the work of the circuit, wire, eliminate leakage danger. 

Understand the use of electric heating pipe environment, is the medium conduction or infrared radiation. 

Select the appropriate power of the electric heat pipe, to ensure the effective use of temperature requirements under the premise of attention to power load problems. 

Understand the use temperature requirements of the electric heating tube, select the appropriate power of the electric heating tube, in general, the power is large, the heating is fast, the temperature rise is fast, and vice versa. 

Water-fired electric heating pipes should be strictly prohibited from dry burning, especially submerged electric heating pipes. 

Dry burning electric heating pipe should pay special attention to the heat dissipation effect of the use environment, which is divided into static air and flowing air. 

Fully understand the use of electric heating tube voltage, generally electric heating tube voltage 220V and 380V. 

To fully understand the connection mode of the electric heating pipe, there are usually star connection and triangle connection. A single electric heating pipe can be connected to 220V or 380V, and multiple electric heating pipes are connected to 380V voltage.

When the power supply is first input, the voltage should not exceed 10 % of the rated voltage marked on various electric heating tubes. If it is applied below the rated voltage, the heat generated by the stainless steel electric heating tube will also decrease. There is a point that when the heating pipe is powered off due to some kind of primary power, it is necessary to pay attention to the cooling of the stainless steel electric heating pipe before connecting the power supply when the power is re-energized, because each time the power is energized, the heating pipe will be subjected to an electric shock, and the wire in the tube will be easily burned off by the electric shock under the hot condition. Stainless steel electric heating pipe terminal, in the wiring of the application of two nuts relatively tight, do not force too hard to avoid the lead screw loose and damage to the stainless steel electric heating pipe. 

The connection end of stainless steel heating pipe should be kept clean and dry, otherwise it will reduce the insulation performance and be broken down by short circuit. If the environment of liquid or gas such as chemical corrosion, inflammable and explosive is applied, the connection part of stainless steel heating pipe should be strictly protected by insulation sealing device to prevent accidents. Stainless steel electric heating pipe used many times, if the surface of the accumulation of thick tube scale, grease stains, should be regularly removed, otherwise it will make the stainless steel electric heating pipe heat transfer performance is reduced and cause the pipe surface heat load exceeds the rated allowable damage. The stainless steel electric heating pipe should be stored in a dry warehouse. If the surface is damp due to long-term placement, the insulation resistance is measured by using the megohmmeter. If less than 1MΩ / 500V, the stainless steel electric tube should be placed in a 200 degree drying oven for drying. The special stainless steel electric heating pipe should be read in detail before installation and use to avoid damage.

1. Components are allowed to work under the following conditions : 

A, the working voltage should not be greater than 1.1 times the rated value, the shell should be effectively grounded. 

b, air relative humidity is not greater than 95 %, no explosive and corrosive gases. 

c, insulation resistance ≥ 1MΩdielectric strength : 2KV / 1min. 

2, electric heating pipe should be fixed, effective heating area must be immersed in liquid or metal solid, no air burning. When it is found that there is scale or carbon deposition on the surface of the pipe body, it should be cleaned and reused in time to avoid heat dissipation and shorten the service life. 

3.When heating the air, the elements should be crossed and evenly arranged, so that the elements have good heat dissipation conditions, so that the air can be fully heated. 

4, heating fusible metal or solid nitrate, alkali, leaching, wax, etc., should first reduce the use of voltage, until the medium after melting, to rise to the rated voltage. 

5. Safety measures should be considered when heating nitrate to prevent explosion accidents. 

6, wiring part should be placed outside the insulation layer, avoid contact with corrosive, explosive medium, moisture ; lead wire should be able to withstand long-term wiring part of the temperature and heating load, wiring screws should be tightened to avoid excessive force. 

7, electric heating pipe outlet end of magnesium oxide powder, in the use of places to avoid by pollutants and water infiltration, to prevent leakage accidents. 

8, components should be stored in a dry place, if the long-term insulation resistance is lower than 1MΩ, can be dried in an oven at about 200 °C, or reduce the voltage energized heating, until the recovery of insulation resistance.

1.Internal lead : The lead of the heating pipe is directly drawn from the inside, and the lead is not easy to break, but the cost is high, usually used for the production of imported processes ; 

2.External wiring : The lead of the heating pipe is drawn from the lead rod, and then the high temperature line is connected. The low cost is widely used, and the domestic single head pipe is used in this process. 

NoticesThe gap between the outer diameter of the mold electric heating pipe and its inserted aperture does not exceed 0.1mm.For example, the heating rod with a diameter of 10 should be an aperture within a diameter of 10.1. Mold electric heating pipe installation should be cleaned before processing left behind residues, such as organic oil and other residues, will be carbonized after heating, thus affecting the ability of heat conduction. Installation hole machining should be effective to ensure that the coaxiality and size tolerances, such as the use of tools such as machining truing machining 

The diameter of the heating pipe is confirmed according to the diameter of the mold hole. Usually, the gap between the two is between 0.1-0.2mm.For example, the diameter of the mold hole is 10mm, so the diameter of the single-head heating pipe of the mold can be 9.8mm. 

2, mold single head heating tube length according to the length of the opening to determine. 

3, mold single head heating tube material according to the working temperature of the mold to determine. 

According to different needs, electric heating tubes of different materials and shapes can be selected. In particular, when buying, we must ask the merchant about the internal production materials. Because the main value of the electric heat pipe is the internal material, so it will appear on the market looks almost things price difference is a lot. And if you want to buy to consider its ability to work and safety performance.