| 摘要 |
FIELD: production of pipes used in gas and oil extraction industry, water supplying systems and chemical industry. SUBSTANCE: pipe has inner and outer lining of plastics reinforced with fibers. In the case between inner and outer lining there is core made of spirally wound steel stripe Steel stripe is encapsulated in plastic die. Inner and outer linings are thread coilings made of single threads or big number of threads. In the case some threads are wound at angle of ± 55 deg. in respect to pipe axis with error in limits of + 5 deg., another thread coilings layers or groups of such layers may be located at different positive and negative angles in respect to pipe axis and to each other. Method provides production of such pipe structure, that gives it not only resistance to corrosion and friction, but increases its strength, rigidity and provides its operational capability under high pressure and pressure, that is close to limiting pressure of break-through without leakage. EFFECT: increased pipe resistance to corrosion and friction, its strength, rigidity and operational capability under high and extremely high pressure without leakage. |
