METHOD OF COVERING INNER SIDE OF PIPELINE Russian patent published in 2006 - IPC F16L58/10 

FIELD: pipeline transport.

SUBSTANCE: method comprises lining hose composed of flexible inner shell, unwoven fiber material, and polymeric binder interposed between them. The hose is pressurized to press it to the inner side of the pipeline and is heated simultaneously up to a temperature above the yield point of the polymeric binder but below the melting temperature of the unwoven fiber material. The hose is heated until the polymeric binder is glued to the inner side of the pipeline and then is cooled down to a temperature below the yield point of the polymeric binder. The polymeric binder can be made of a thermally meltable glue, and inner flexible shell is made of a hose made by welding corrosion-resisting metallic belts.

EFFECT: prolonged service life.

1 cl, 3 ex