METHOD OF PREPARATION OF MULTI-LAYER PLASTIC PIPE Russian patent published in 2003 - IPC

Abstract RU 2219426 C2

FIELD: pipe line transport; manufacture of multi-layer plastic pipes for erection of various pipe lines. SUBSTANCE: proposed method includes manufacture of tube blank and application of outer layers on it; layer of foamed plastic is applied by extrusion method on surface of pipe blank heated to melting point of plastic. EFFECT: enhanced efficiency; avoidance of heat insulation. 1 dwg

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RU 2 219 426 C2

Authors

Nikiforov V.N.

Kozodoev L.V.

Zhuravlev V.S.

Dates

2003-12-20—Published

2001-08-13—Filed