Tips for Leak-Free Hydraulic Tube Fitting Connections: Tube End Preparation

Tips for Leak-Free Hydraulic Tube Fitting Connections: Tube End Preparation

November 3, 2021

Your hydraulic systems rely on airtight and liquid-proof seals. That’s why preparing your tube ends properly is so important. In fact, it’s one of the most essential processes when it comes to getting the best seal possible. Whether you’re using a flared, flanged, brazed or preset tube end hydraulic connection, taking the time to prepare the tube end connections will net superior results.

It’s a simple, three-step process: cutting, deburring and cleaning is all you need to ensure better hydraulic connections, no matter what kind of tube you use. This will ensure your tube’s integrity is preserved and will prevent leakage in the connections.

Here are our best tips for leak-free connections.

Tube cutting

Your tubes need to be cut squarely within one degree (plus or minus). Tubes have to be cut squarely, or else you risk an improper fit in the braze sleeve or fitting body, depending on the type of hydraulic connection you’re using. It could also result in a non-circular flange or flare.

Generally, a saw-toothed blade is recommended for flaring, flanging, brazing or presetting, since it offers a clean cut and minimal burrs. You’ll also be able to avoid contamination and unnecessary heat exposure that can come with using tube cutters and abrasive saws.

For harder metals, consider using a rotary toothed saw, or a hacksaw with a saw guide. While you can use rotary tube cutters on softer metals like copper and aluminum, trying to use them on steel or stainless steel will cold form the tube.

Tube deburring

Next, you’ll need to deburr the inside and outside of the tube to ensure the proper fit, and avoid system contamination or leakage. You can use a hand deburring or power deburring tool to remove the burrs and sharp edges. Make sure not to remove too much material from the tube itself.

Tube cleaning

Finally, it’s time to clean the tubes. Even after deburring the tube, there may still be debris inside that will contaminate the system or cause leakage. Simply use a brush to remove debris from the inside, and a clean rag to wipe off the outside of the tube. This should be done before using flaring tools, or flanging, brazing and presetting.

Using these tips will help ensure you have a safe, sealed hydraulic connection that provides the results you need. Just a few minutes of preparation is all you need. When you get into the habit of cutting, deburring and cleaning properly before moving on to other processes, you’ll consistently see better results across the board.

Find the hydraulic connection parts and fittings you need

When you need hydraulic hoses, fittings, valves and more, turn to Royal Brass Incorporated. Our team is happy to help you locate exactly what you need for your hydraulic systems, no matter how unusual or hard to find. Not sure what’s required? Our staff is familiar with Parker Hannifin’s entire line of products, so you’re sure to find the supplies you need. Call or stop by today to get started.

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