| 摘要 |
The corrugated pipe has corrugations extending in its longitudinal direction. It has an elliptical base profile curve, with its corrugations forming a wave pattern. The pipe consists of very strong or ultra-strong steel with a tensile strength limit R p0.2, greater than N/mm2, with a material thickness of 0.1-0.3mm. The wave length lambda is determined by the formula lambda pi d1 alpha/360 where d1 = the ellipse short axis, which has a length of 20-100mm, alpha is a sector angle for a sector in the ellipse with a center in that of the ellipse, the arc length = the wave length lambda and the sector center line coincides with the ellipse short axis. The ratio between the ellipse long and short axes is a maximum of 3. |
