| 摘要 |
FIELD: pipe line engineering. SUBSTANCE: pipe preferably made of polymeric materials has a strengthening means made up as a metallic grid breading which consists of longitudinal and lateral rods wound on the longitudinal rods. The rods are welded together at the points of intersection. The longitudinal rods are arranged along a screw line. The angle of the screw line of the longitudinal rods does not exceed the angle of the screw line of the lateral rods. EFFECT: enhanced reliability. 1 dwg |
