What are the implications of interchanging and intermixing?
Interchange - A tube fitting manufactured by one company that has been installed on a piece of tubing is then disassembled, and the tubing, nut and ferrules from that installed fitting is reassembled into the body of another manufacturer.
Intermix - Tube fitting components, which include the nuts, ferrules, and bodies, from two or more fitting manufacturers that are mixed together and then assembled to make a complete fitting.
Over the years, we've become aware of many manufacturers with products which claim to be interchangeable and intermixable with the Swagelok Tube Fitting.There is no industry wide design standard, no validation testing and no accountability when intermixing or interchanging manufacturers. That is why the practice voids the Swagelok Limited Lifetime Warranty.
We believe that no manufacturer can reliably, repeatedly, and uniformly replicate the products of another manufacturer and intermixing and interchanging components can result in unpredictable performance, increased costs and dangerous applications.
Make your own decision by downloading the Journal of Engineering's White Paper "Intermixing Twin Ferrule Tube Fittings-Is it safe"