For the ordinary direct laying and installation process of the electric heating cable, if there is no curved pipe part, the electric heating cable connection method is relatively simple, and it can be tiled and fixed along the pipe winding control. If you encounter a pipeline with several bends, the installation plan of the electric heating cable is different from the ordinary installation. It is mainly necessary to consider that the bending part can normally play the insulation effect of the electric heating cable, and the laying position or angle is different.
Connection method of electric heating cable in pipe bend
The connection method of the electric heating cable for the right-angle curved pipeline is that the electric heating cable is laid flat along the straight pipe, and when it encounters a 90° bend, the electric heating cable is laid along the inner side of the pipe. The inside of the bend is laid from the side of the pipe to the outside just above, so as to keep the electric heating cable in contact with the pipe wall. Out of the right-angle 90 ° part, and then lay the electric heating cable along the plane directly below. During the laying process, each interval is fixed with sub-mineral tape or aluminum foil tape, a special accessory for electric heating cables. If it is necessary to adjust the fit of the electric heating cable and the pipe wall, and leave a certain amount in the appropriate position for later use.
The self-limiting temperature electric heating cable connection method of the right-angle turning pipeline is shown in the figure above. If the method of laying in the opposite direction is common, follow the reverse order described above. If two electric heating cables are used for direct laying, they should be laid opposite to each other according to the same path. It can not only keep the electric heating cables from wrapping or stacking, but also achieve the purpose of uniform heating. What needs to be paid attention to here is that it is strictly forbidden to twist the two wires together at the end of each electric heating cable; the electric heating cable should be attached to the outer diameter of the pipe elbow as much as possible, which can achieve the best insulation effect.