ã€China Aluminum Industry Network】Structured wall tube structuredwallpipe The composite pipe wall structure composed of multiple layers of materials and the wall of the pipe are collectively referred to as pipe structures of open-ended ribs, closed ribs (hollow), and other special-shaped pipe wall structures. Shaped wall pipe profiledwallpipe The inner wall is smooth, and the outer wall is a collective name for spiral, ring-shaped or ring-shaped ribbed pipe wall structure. Double wall corrugated doublewallcorrugatedpipe The inner wall is smooth and smooth, the outer wall is trapezoidal or arc-shaped corrugated ribs, and the inner wall and the outer wall corrugated are hollow shaped pipe wall tubes. Annular ribbed pipe The inner wall of the pipe is smooth and flat, and the outer wall has a special-shaped pipe wall pipe with an annular rib. Spiral ribbed tube The inner wall of the pipe is smooth and smooth, and the outer wall ribs are spirally shaped, and the special-shaped pipe wall pipe made by the spiral winding process is used. Flat wall pipe plainwallpipe Homogeneous pipe wall pipe with smooth outer wall of pipe wall. Nominal diameter (DN) nominaldiameter The nominal diameter of a thermoplastic pipe system pipe, indicating the pipe's inner diameter, outer diameter, or its approximate value. Ring-bendingstiffness A measure of the ability of the pipe to resist circumferential deformation. The cadenza test method or calculation method is set in units of N/m2 or KN/m2. Elastic diameter deformation rate elasticdiameterderormationrate The ratio of the value of the vertical elastic deformation of the pipe under the effect of external pressure to the diameter of the central axis of the pipe wall before loading. Expressed in percent, determined by the crush test.
