text.skipToContent text.skipToNavigation
metal tubing fz and fn series

Swagelok® Metal Tubing (FZ and FN Series)

FZ and FN series metal tubing reduce permeation in high-temperature vacuum and low-pressure applications.

Get Help Selecting Tubing

FZ Series Metal Tubing

The FZ series is a zero-braid version of the FJ series hose and is an option for applications that do not experience pressures that require a braid on the core tube. This non-annealed all-metal tubing can be used in dynamic applications.

FN Series Metal Tubing

The FN series is an annealed, zero-braid version of the FJ series hose and is an option for convoluted metal tube (CT) applications. The form-fit-and-stay capability of its assemblies can compensate for misalignment and system reroutes between static connections in vacuum or low-pressure static applications. It is not intended for dynamic applications.

The FZ and FN series 316L stainless steel tubing are designed to meet the needs of high-temperature vacuum or low-pressure applications where permeation is undesirable. Custom assemblies are available with other options including tubing tags, additional cleaning, and additional helium leak testing.

Learn Everything You Need to Know About Industrial Hoses

Specifications

Working PressuresFZ Series: up to 250 psig (17.2 bar)
FN Series: up to 135 psig (9.3 bar)
MaterialsCore: 316L SS
End Connections: 316 SS
Nominal Hose Sizes1/4 through 1/2 in.
Temperature Range–325 to 1000°F (–200 to 537°C)
Maximum Continuous Length480 in. (1219 cm)
End ConnectionsSwagelok® tube adapters, rotatable male and female VCR® metal gasket face seal fittings, female VCO® O-Ring face seal fittings, tube butt welds

Select the Right Hose

Swagelok hose management services engineer

Swagelok® Hose Advisory Services

Learn how to enhance your hose selection, installation, inspection, and maintenance procedures to improve hose life and performance, reducing costs in the process.

Read About Hose Management

Swagelok Resources Curated for You

Swagelok hose and flexible tubing
3 Steps to Hose Safety & Lower Plant Costs

Industrial hose safety is often deprioritized during regular plant maintenance. It is important hoses receive the attention they deserve—leaks and wear can put your facility at risk. Learn tips to avoid dangerous situations while lowering plant costs.

Industrial hose maintenance
How an Industrial Hose Maintenance Plan Could Save Your Plant Thousands

Knowing the proper time to replace your industrial hoses can save your plant thousands in maintenance costs. Learn how to evaluate your systems and develop a preventive maintenance plan to manage the health of your hoses.

industrial hose replacement material considerations
Industrial Hose Replacement: Core Tube Material Considerations

When selecting an industrial hose, the first place to start is the core tube—the hose’s innermost layer. Learn how to select the ideal hose for your application with information on core tube materials & wall construction from the experts at Swagelok.

Industrial hose reinforcement types
How to Select the Right Hose Reinforcement

Industrial hoses typically contain critical reinforcement layers that contribute to longevity and performance. Learn about different reinforcement layer types and which is best suited for different fluid system applications.

This process may take several minutes. Please be patient and remain on the page.