| 摘要 |
FIELD: pipeline transportation. ^ SUBSTANCE: invention is referred to field of pipeline transportation and can be used in a pipe lines construction in the oil-extracting and petrochemical industry, and also in housing and communal services system. Into a metallic tube a polymer shell is injected, the shell ends is affixed to a tube by pinching collars by radial strain of collars. For facing the shell with the external diameter exceeding an inside diameter of a tube is used. Before inputting in a tube the shell is stretched in an axled direction until its external diameter does not become less than inside diameter of a tube, then a shell extension is taken out, therefore its external diameter is elastically restored and the shell tightly fit to an internal surface of a tube. ^ EFFECT: improvement of quality of tubes facing. ^ 3 dwg |
