But hoses cannot always be substituted in. If tubing is a requirement, more information about Rotary Flex Vibration protection can be found in this video or by reading the highlights below.
Butt weld fittings are considered the industry gold standard for vibration protection, but there is another option that reaches the same quality level based on millions of cycles of testing: The standard Swagelok tube fitting.
The design of the Swagelok tube fitting helps prevent tube fracturing. The hinging and colleting back ferrule create a colleting region. The tube fitting therefore protects the stress riser and supports the tubing in that colleting region.
When a tube fitting is used that doesn’t produce a colleting region, they do not survive well during rotary flex vibration testing, since no vibration protection is provided.
For more information on Swagelok Tube Fittings, or to request your pocket guide, check out our Tube Fittings page.