Verbundmetallröhre mit vortrefflicher Beständigkeit gegen Korrosion, hohe Temperaturen und Drücke.

摘要

Composite pipe adapted for use, for example, in line pipes for crude oil or natural gas producing oil wells and having excellent corrosion resistance and mechanical properties to withstand high temperatures and high pressures, the composite pipe having an outer layer made of a material comprising in % by weight 0.05 to 0.20% of C, up to 1.0% of Si, up to 2.0% of Mn, up to 1.0% of Cr, 0.2 to 2.0% of Ni, up to 1.0% of Mo, 0.05 to 0.15 of V, up to 0.1% of Al, and the balance inevitable impurities and Fe, the material being up to 0.45 in carbon equivalent expressed by: $an\; inner\; layer\; made\; of\; stainless\; steel,\; high\; alloy\; steel\; or\; like\; corrosion\; resistant\; alloy,\; and\; an\; intermediate\; layer\; substantially\; intermediate\; between\; the\; outer\; layer\; and\; the\; inner\; layer\; in\; composition\; and\; having\; a\; thickness\; of\; 10\; to\; 100\; mu\; m,\; the\; intermediate\; layer\; providing\; a\; boundary\; between\; the\; outer\; and\; inner\; layers\; and\; being\; metallurgically\; joint\; to\; the\; outer\; layer\; and\; the\; inner\; layer\; integrally\; therewith.$