PIPES (VERSIONS) Russian patent published in 2001 - IPC

FIELD: construction engineering; erection of pipe lines for transportation of liquid and gaseous aggressive media at high pressures, vacuum and considerable temperature fluctuations; chemical, oil and gas industries. SUBSTANCE: proposed pipe is made from thermoplastic with strength member in form of metal framework consisting of longitudinal metal load-bearing and transversal member. To ensure flexible of pipe laying bent sections of pipe line; longitudinal and transversal members are welded at least at every other point of their intersection at any combination in staggered order. According to second version, transversal members are secured to at least one longitudinal member but no more than to two opposite members. EFFECT: enhanced reliability due to increased flexibility of pipes at retained radial strength. 3 cl, 4 dwg