Deburr copper pipe

The deburring of copper pipes is part of the installation. Nevertheless, questions are asked again and again whether it is really necessary. Here is a guide that explains exactly why deburring is so extremely important and what can happen if it is omitted.

The installation of copper pipes (soldering)

Copper pipes for drinking water, heating or cooling systems are the most commonly used. The work process is described exactly:

  • Cut copper tube to length
  • Deburr copper pipe
  • Calibrate copper tube
  • Solder copper tube
  • Tightness and / or pressure test

The cutting of copper pipes

Even the cutting of a copper pipe must not be carried out with any tools. Basically you need a pipe cutter and a fine iron saw. The pipe cutter is used to diameters of 10 to 8 mm, then the iron saw is preferable. In addition, the iron saw must be used where the pipe cutter can not be used.

Deburr inside and outside

When cutting creates a burr. The tube cutter actually only inside. Excessive pressure may cause the copper to press outward. Consequently, copper pipes are deburred inside and outside with a deburrer and also chewed lightly. The specialized trade offers different deburrers in different sizes.

Calibrating the copper tubes

Since the pipe can also be easily crushed at the ends when using a saw or pipe cutter, it must be recalibrated afterwards. To calibrate the copper tube, a calibration mandrel is driven into the tube and then a calibration cylinder is driven from the outside over the copper tube end.

Deburring ensures the correct gap

In interaction (deburring and calibrating), the correct diameter of the pipe ends is ensured. The gap between the copper tubes when pushed together is then 0.1 to a maximum of 0.2 mm. This is the gap required to use the capillary effect.

If the copper tube is soldered, the molten solder runs through this capillary effect in this gap and soldered the two tubes together tightly. Of course, provided that the pipe has been heated well enough over the entire soldering area, so that no cold soldering can occur.

Outside and inside deburring of both pipes ensure that the distance is right and that the molten solder can flow optimally into the gap. A burr could lead to an unsatisfactory solder joint and thus to leaks. The leaks can occur only weeks later.

Why the inside de-burring is important as well

But the inside deburring has another reason. If the burr is not removed inside, this can later lead to turbulences in the transported liquid. This can lead to a pressure loss in this area. But also erosion and corrosion are possible consequences, if not deburred.

Tips & Tricks

In fact, there are some skilled craftsmen who are not that serious about deburring. Especially with small copper pipe diameters is heard again and again "this is not necessary". That's wrong. Here, too, the damage that has not been removed can lead to further damage, which, however, is difficult to place in a corresponding context in terms of time.

Not entirely innocent of it is the fact that especially when joining pipes, including copper pipes, is usually billed in the chord. Cutting, deburring, calibrating and soldering is therefore not paid for in terms of performance, but rather for speed.

Video Board: How To Deburr Copper Pipe for Refrigeration & Plumbing