PRESSURE PIPE Russian patent published in 2007 - IPC F16L9/12 C08L23/14 C08F210/06 C08F210/16 C08K5/00 F16L9/127 B32B27/32 

FIELD: mechanical engineering; transportation of liquids and gases.

SUBSTANCE: invention relates to pressure pipe made of polypropylene composition and designed for transportation of liquids and gases, for instance, water or natural gas at increased pressure. Proposed pressure pipe with increased resistance to pressure acting during long period made of polypropylene composition of partially crystallized in β modification random propylene copolymer containing 73.0-99.0 mass % of propylene and 1-20 mass % of one or several C₄-C₈ α olefins and/or up to 7.0 mass % of ethylene.

EFFECT: provision of higher operating properties, reduced dependence of measured times of breakage under applied ring load.

13 cl, 10 ex, 2 tbl, 1 dwg