Special composite tapes for patching thermal insulated pipeline

The utility model provides a special composite tapes for patching thermal insulated pipeline, which is used by the polyethylene foam insulated pipeline, and belongs to the patching device used for a heating power pipeline and petrochemical industry. The utility model is characterized in that the special composite tapes for patching thermal insulated pipeline forms a layer-shaped structure; an outer layer is a heat shrinkage layer; an intermediate layer is a heating layer; an inner layer is a welded layer; the inner, the intermediate and the outer layers are pressed into a whole in connection. The utility model used for patching a polyethylene foam thermal insulated steel pipeline has the advantages of uniformly welding, smooth appearance and superior tightness to that of a common patching method.