PIPE LINE Russian patent published in 2003 - IPC

Abstract RU 2211397 C2

FIELD: construction engineering; laying plastic pipe lines. SUBSTANCE: proposed pipe line includes thermoplastic pipes molded integral and reinforcing layers; thermoplastic layers are connected by welding. Thermoplastic and reinforcing layers of pipes are not fastened in at least zone of shrinkage stresses arising during welding over length equal to at least 10 thicknesses of thermoplastic layers from area of welding. EFFECT: enhanced reliability. 2 cl, 1 dwg

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RU 2 211 397 C2

Authors

Grejlikh V.I.

Maevskij I.I.

Shaklein O.V.

Dates

2003-08-27—Published

2001-11-26—Filed