Tig Welding Copper Pipe

This was done using a tig welder with silicon bronze rod.

Tig welding copper pipe.

The oxygen will corrode your weld bead under the heat of tig welding. It is often necessary to raise the temperature level of the sheet in an area of 6 0 to 12 0 in. Use the proper gas ratio. Some grades of copper have oxygen dissolved in the metal.

In welding copper sheets the heat is conducted away from the welding zone so rapidly that it is difficult to bring the temperature up to the fusion point. If you are tig welding copper buy oxygen free copper. Now technically this would be classified as tig brazing because the stainless steel has a higher melting point then the silicon bronze filler rod. If the copper is thicker you will need to adjust the gas and amp by applying helium and upping the.

Below is a picture of a successful copper pipe to stainless steel tri clamp ferrule weld. Whereas mig welding requires a preheating of 10 100 c and up to 240 amps of power with argon as its shielding gas. Buy the right copper. Subscribe for new videos every monday and friday.

As a general rule of thumb copper under 2 mm should have argon gas and up to 160 a applied. I am an experienced 6g pipe welder with certs in both stick and tig. Oxygen free copper doesn t have this problem and it takes tig welds beautifully. Depending on if you are using tig tungsten inert gas or mig metal inert gas and the thickness of your copper you will need to adjust the ratio of your gas and temperature.

For example in welding copper with thickness of 5mm 0 196 inch tig welding requires a preheating of 50 c as well as shielding gas of argon helium and mix up to 300 amps of power. On a large firewater system for an offshore platform orbital welding was able to reduce welding time to one half that of manual welding and cut reject rate from 15 to 5 7 the joint design tolerances must be tightly controlled. Automatic welding cu ni with orbital pipe welding equipment offers higher production rates and fewer weld defects.