The role of electric accompanying heat tape is in order to prevent the process production facilities and the living facilities on the platform in all kinds of process pipeline as well as the liquid condensation in the container and set up the electric heating system. The electric accompanying heat system sometimes installs in the outdoor land environment, the rainy weather is the electric accompanying heat system protection must consider the situation.

 　　                 Once rainwater seeps into the inner layer of the outdoor electric heat tracing system, its heat preservation ability will be greatly reduced. If the sheath is damaged, it is likely to cause electric breakdown and spark phenomenon. Therefore, in order to prevent the electric accompanying heat tape from being damaged unconsciously during the construction, the insulation layer and waterproof layer must be installed as soon as possible after the insulation test is qualified.

 　　                       Insulation layer and waterproof layer are important parts of electric heat tracing cable system, which must be installed in strict accordance with the design requirements. Electric accompanied by the surface of the heat preservation layer, can reduce the heat loss, so that the heat supply is more concentrated. Just like wearing cotton clothes, it can store heat for backup. At the same time the external insulation protection electric heating cable protection system, play the role of isolation protection. Reduces the use of electricity and prolongs the service life of the electric accompanying heat tape. When installing the insulation layer, the insulating material must be dry, because the wet insulating material will affect the insulating effect, and will also corrode the electric accompanying heat products, thus shortening the service life of the whole electric heating cable insulation system.

 　　                       After the installation of heat preservation material, it must wrap the waterproof layer immediately, otherwise it will reduce the heat preservation performance and affect the normal use of the accompanying heat system. When installing waterproof layer, it should prevent the metal sheet from scratching the sheath of electric accompanying heat tape, and the screw for fixing the waterproof sheet should not be too long, so as not to puncture the sheath. Insulation layer and waterproof layer installation, need to re-measure the insulation resistance and make a good record, in order to ensure the normal use of the late electric accompanying heat system. After the installation of the electric accompanying heat system, should be in the heat preservation layer on the warning label, marked "electric heat tape in the inside", and marked all the accessories position, in order to future repair and maintenance.