FIELD: transportation.
SUBSTANCE: thin layer of a metal protector is preliminary evaporated on the pipe inner surface tip with the inner protective coat. Now, a split metal ring is placed on the said metal protector evaporated layer, its metal conforming to that of the said evaporated layer, and is pressure-welded in the protector super elastic deformation conditions and deformations rates subject to the alloy.
EFFECT: reliable and strong contact of the protector with the pipe surface and better welded joint seam nearby zone protection.
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RU2293632C1 |
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RU2532473C2 |
