The outer insulation layer is a passive insulation product, which cannot be adapted to pipeline insulation in cold areas, while electric heat tracing is an active insulation product, which can meet the needs of pipeline antifreeze insulation heating. However, the outer insulation layer is an indispensable factor to meet the customer's heat tracing needs with the least amount of electric heat tracing. It can ensure the heating effect and service life of the electric heating system, and provide a more comfortable working environment for the electric heat tracing. The following specifically introduces what are the functions of pipeline electric heat tracing external insulation?
External thermal insulation is an important and indispensable auxiliary material for electric heat tracing. In the calculation of heat loss, the thickness and coefficient of the insulation layer are important parameters affecting the number of meters used and the installation method of electric heat tracing, and the insulation material with high thermal insulation coefficient is selected to increase the thickness of the insulation layer. It can increase the coefficient of whether the whole system is to the heat trace effect, and can also reduce the number of meters of electric tracing to reduce the cost. The outdoor insulation materials of the pipeline include rubber and plastic sponge, ultra-fine glass surface, rock wool, polyurethane tile, polyurethane on-site foaming, etc., and their insulation coefficients are different.
In many severe environments, such as flammable and explosive gas environment, external insulation can isolate the electric cable from the outside world to avoid oil and gas accumulation, open air or buried pipeline electric trace and external humid environment isolation, after applying the rainproof layer, keep the electric cable always in a dry environment, avoid the phenomenon of uneven heating and cooling of the electric trace. The demand for some high temperature heat tracing, maintaining a very high temperature, people can not touch, with external insulation plays a role in heat insulation, so that people can touch.
In general, electric heat tracing can not be separated from the support of external heat preservation, and a single insulation layer away from the electric heat trace, can not achieve the function of active heat preservation, only do a good job of external insulation of the pipeline, in order to ensure the use of electric heat tracing safety and heat tracing effect.
