Swagelok Tubing Data
Engineered Combinations

This data sheet contains suggested allowable working pressures for assemblies of Swagelok tube fittings with tubing of diverse materials.

Although matching tubing and fitting materials is common practice for optimal system operation, the performance advantages of Swagelok 316 stainless steel tube fittings enable successful mixed-material combinations, even severe environments.

For example, the combination of Swagelok 316 tube fittings and alloy 254 tubing can provide an economical, corrosion-resistant solution for installations that might be exposed to sea water.

Advantages include:

  • Higher chromium and nickel concentrations than standard 316 stainless steel for enhanced corrosion resistance.
  • Superior tube grip achieved with Swagelok’s patented hinging-colleting™ back ferrule design that translates axial motion into radial swaging action on the tube, yet operates with a low assembly torque requirement.

As with any mixed material assembly, pressure ratings for tubing and fittings from different alloys will be governed by the lower material rating. See the Swagelok Gaugeable Tube Fittings and Adapter Fittings catalog (MS-01-140) for more information about Swagelok tube fitting features and performance.

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