| 摘要 |
Process for producing an insulated pipe from an inner pipe, a foam plastic insulating layer and an outer pipe, inner pipe, foam plastic insulating layer and outer pipe being combined by adhesive forces. The inner pipe is rotated about its axis and the foam plastic insulating layer is foamed helically onto the rotating inner pipe in closely adjacent windings. During or after this process the outer pipe is produced on the foam plastic insulating layer by winding on a synthetic-resin web. <IMAGE> |
