Intermix Featured Image

Intermixing and Interchanging Tube Fittings

If you are looking at fitting options for your process system you need to be positive the manufactures you source from are compatible and reliable together. In this video we take a look at the question of the compatibility of compression tube fittings between the popular brands of Swagelok and DK-Lok.

To prove the interchangeable properties of their product, DK-Lok has conducted a complete “intermix” test between DK-Lok and Swagelok products against the a battery of tests from the ASTM F-1387 standard.

The purpose of the test was to establish that any intermixed combination of DK-Lok and Swagelok individual components will provide leak-free performance synonymous with pure assemblies. When these unions were subjected to various conditions inherent to the environments for which compression tube fittings are commonly exposed to in practical every day installations they functioned flawlessly.

Click below to view the test results/performance report.

The performance results are conclusive confirming DK-Lok Tube Fittings are interchangeable with Swagelok for threads, make-up distance, bore, sealing integrity, surface finish, design and pressure ratings.

DK-Lok even offers an intermix guarantee publicly to the marketplace based upon TUV Rhineland witnessing of intermix test results between DK-Lok and Swagelok components in accordance with ASTM F1387-99 (2005). They are also confident enough in their quality that they back up their product with a 45 Million Dollar insurance policy from AIG Insurance.

From these tests it’s clear that all DK-LOK products are developed, manufactured and tested to meet and exceed the requirements of various industry applications around the globe.

If this has gotten you thinking of other options for your process components check out our article on making the switch.


If you have any questions, feel free to send us an inquiry online or call us at 1-800-234-3033 and we will make sure to get back to you as soon as possible.