FLANGED CONNECTION OF PARTS Russian patent published in 2004 - IPC

FIELD: flanged connection of pipe-lines, Christmas trees of oil and gas wells under internal pressure of liquid and gaseous media. SUBSTANCE: given flanged connection includes standard, reliable, metal spacer and additional protective elastic ring interference fitted on internal surface of metal spacer. Metal spacer has no annular groove in its internal surface. EFFECT: increased strength and reliability of metal spacer, its protection against corrosive action of working medium, possibility of multiple usage of metal spacer and protective elastic ring, prevention of outbursts of explosion- and fire-risky fluids and gases with emergence of danger or fire at oil and gas wells and in pipe-lines. 2 dwg