METHOD OF APPLYING COATING ON BOTTOM PIPE INTERNAL SURFACE Russian patent published in 2016 - IPC F16L55/165 B29C63/34 F16L58/02 

FIELD: transport.

SUBSTANCE: invention relates to pipeline transport and can be used for repair of pipelines with through holes. For method implementation into bottom pipe of tubular sleeve from dry fibrous material is drawn, enclosed into flexible shell from polymer material. Then in sleeve additional sleeve with fibrous material is introduced by means of eversion, impregnated with thermosetting binder, in amount, sufficient for both sleeves fibrous material soaking. Sleeve dry fibrous material is impregnated with binder during introduction of additional sleeve and binder curing.

EFFECT: technical result: uniform distribution of binder around circumference in sleeves cross-section.

1 cl, 1 dwg