MODE OF MAKING A CURRENT INSULATING INSERTION FOR A PIPELINE Russian patent published in 2006 - IPC F16L25/03 

FIELD: the invention refers to the field of the pipeline transport and may be used for electric disconnection of pipelines and/or their sections particularly at protecting them from corrosion.

SUBSTANCE: dielectric insertions are placed between adjacent butt-ends of two sockets fulfilled out of the material of the pipeline and between the sockets and the exterior muff connecting them. The interior surface of the sockets in the zone of location of the muff is provided with ring lugs with the height exceeding the thickness of the dielectric insertions between the sockets and the muff and radial distribution of sockets is carried out as a minimum until elimination of gaps between the sockets and the muff along the entire length of their coupling. The ring lug on the interior surface of the sockets are made by way of fixing of packing rings inside the sockets. As dielectric insertions between the sockets and the muff an exterior plastic covering of the sockets may be used. In case of transporting along the pipeline of electrically conducting fluid the inner surface of current insulating insertion is provided with dielectric covering.

EFFECT: reduces labor-intensiveness of manufacturing.

4 cl, 3 dwg