Tube Basic Terms

China Aluminum Industry Network Structured wall tube, also known as structured wall pipe, refers to a type of pipe with a composite wall made from multiple layers of materials. These pipes are characterized by their open-ended ribs, closed ribs (hollow), or other special-shaped wall structures. They are commonly used in applications requiring both strength and flexibility, such as drainage, irrigation, and underground piping systems. Profiled wall pipe, or shaped wall pipe, features an inner wall that is smooth and flat, while the outer wall has a structure that includes spiral, ring-shaped, or ribbed patterns. This design enhances structural integrity while keeping the weight of the pipe relatively low. Double wall corrugated pipe consists of an inner wall that is smooth and a corrugated outer wall with trapezoidal or arc-shaped ribs. The combination of these two walls creates a lightweight yet strong pipe that is ideal for use in sewage and drainage systems. Annular ribbed pipe has a smooth inner wall and an outer wall that features annular (ring-shaped) ribs. This design provides additional rigidity and resistance to external pressure, making it suitable for heavy-duty applications. Spiral ribbed pipe is manufactured using a spiral winding process, resulting in a pipe with a smooth inner wall and spiral-shaped ribs on the outer surface. This structure improves the pipe’s load-bearing capacity and makes it ideal for use in large-scale infrastructure projects. Plain wall pipe, also known as flat wall pipe, is a simple pipe with a uniform wall thickness and a smooth outer surface. It is often used in applications where a straightforward and cost-effective solution is needed. Nominal diameter (DN) is a standardized measurement used to describe the size of thermoplastic pipes. It represents either the internal diameter, external diameter, or an approximate value of the pipe’s dimensions, allowing for easy identification and compatibility between different components. Ring-bending stiffness is a key property that measures a pipe's ability to resist circumferential deformation under external loads. It is typically measured in N/m² or kN/m² using standardized test methods like the ring stiffness test. Elastic diameter deformation rate refers to the percentage of vertical elastic deformation a pipe undergoes under external pressure relative to its original diameter. This value is determined through a crush test and is an important indicator of a pipe’s structural performance under load. By understanding these terms and their applications, engineers and designers can make informed decisions when selecting the most suitable pipe for a given project. Whether it's for drainage, construction, or industrial use, choosing the right pipe structure ensures long-term durability and efficiency.

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