Common Terms For Pipes And Pipe Fittings-4

31. Spiral ribbed pipe:
The inner wall of the pipe is smooth and flat, while the outer wall has strengthened ribs in a spiral shape. It is a special type of pipe with an irregular wall structure made through the spiral winding process.
32. Flat wall pipe:
This is a homogeneous pipe with smooth inner and outer walls.
33. Mechanical connection pipe fittings:
Pipe fittings that are connected through mechanical connection methods (such as threaded connection, compression connection, etc.).
34. Elastic sealing pipe fittings:
Pipe fittings that achieve sealing connection using elastic sealing rings. They usually cannot transmit axial loads.
35. Solvent bonding pipe fittings:
Pipe fittings that are connected through solvent-based adhesives.
36. Electrofusion pipe fittings:
Pipe fittings with pre-set electric heating elements on the connection surface (below).
37. Heat fusion butt pipe fittings:
Pipe fittings with ports of the same size as the connected pipes, achieving connection through heat fusion butt welding.
38. Heat fusion socket pipe fittings:
Pipe fittings that are connected by heating the inner surface of the pipe fitting socket and the outer surface of the pipe or valve insertion end, then inserting and mutually melting to achieve mutual connection.