Structured wall pipe structured wall pipe
This is a generic term for a pipe with a composite wall structure consisting of multiple layers of material and a profiled wall pipe with open ribs and closed ribs (hollow).
profiled wall pipe
The collective name of pipe with smooth inner wall and spiral, ring-shaped or hyun-shaped ribbed outer wall structure.
Double wall corrugated pipe double wall corrugated pipe
The inner wall is smooth and flat, the outer wall is trapezoidal or curved corrugated rib, and the inner wall and outer wall are hollow between the corrugated pipe.
Annular ribbed pipe
The tube inner wall is smooth and flat, the outer wall has the annular reinforcement rib shaped pipe wall.
Helical ribbed pipe
Pipe with smooth inner wall and spiral reinforcement ribs on the outer wall, made by spiral winding process.
plain wall pipe
Homogeneous pipe with smooth inner and outer walls.
Nominal diameter (dn) nominal diameter
The calibrated diameter of a thermoplastic pipe system pipe, indicating the size of the pipe inner diameter, outer diameter or its approximate value.
Ring bending stiffness ring-bending stiffness
Pipe resistance to ring deformation of the ability to measure. Can be colored test methods or calculation methods to determine the value, the unit for n/m2 or kn/m2.
elastic diameter derormation rate elastic diameter derormation rate
Pipe under the action of external pressure load, the value of vertical elastic deformation of the pipe diameter and the ratio of the diameter of the central axis of the pipe wall cross-section before loading. Expressed as a percentage, determined by the flattening test.