Transparent Blue Red Black Flexible PU Pneumatic Tube
Views: 88 Publish Time: 2022-12-16

Tubing type

Tubing and hose may seem to be the same, but tubes are designated by their external diameter so as to be compatible with push-to-connect fittings. Hose is designated by its internal diameter, and usually comes with rigid, swivel or quick-disconnect fittings that are attached at both ends. Pipes are entirely rigid, constructed from a single solid material and usually defined by their internal diameter dimension.

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Tubes are relatively rigid vessels generally made from one solid material, typically some kind of thermoplastic, which can also be internally reinforced for higher strength:

  • Nylon is light, tough and dimensionally stable, with low water absorption and high resistance to flexural fatigue.

  • Polyurethane is flexible, strong, resistant to abrasion and kinks and can also withstand contact with oils and fuels.

  • Polyethylene and high density polyethylene (HDPE) are widely resistant to solvents and chemicals, and relatively cheap with good flexibility.

  • Polypropylene withstands UV radiation, is resistant to chemical attack and can be formulated for use in food-contact applications.

  • PVC and CPVC (chlorinated polyvinyl chloride) is light and usually more flexible than polyethylene or nylon, with a good resistance to chemicals, and can sustain repeated sterilisation. It is also usually transparent, enabling visual confirmation of flow.

Hoses are completely flexible vessels constructed from a variety of the same thermoplastic materials. An inner tube is reinforced with one or more layers of spiral-wound or braided fibres, with a protective outer cover. Hose is generally more expensive than tubing but is more rugged and durable, as it is often used for manual tools and gets dragged across abrasive surfaces.

 

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