PIPE WITH INNER PLASTIC ENVELOPE Russian patent published in 1994 - IPC

Abstract SU 1572141 A1

FIELD: oil producing industry in erecting the pipe lines for transportation of technological liquids. SUBSTANCE: pipe 1 with plastic envelope 2 is provided with protective bush 3 and safety bush 4 and circular clearances 5 filled with conducting composition material at different melting points of its components. EFFECT: prevention of break of plastic envelope in welding the pipes. 2 cl, 1 dwg

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SU 1 572 141 A1

Authors

Kudrjashov N.N.

Zagirov M.M.

Dates

1994-11-15—Published

1988-07-15—Filed