Can You Weld Galvanized Pipe?

Galvanized pipes find application in industrial, plumbing, and construction works owing to the zinc which acts as rust and corrosion resistant coating on steel. But, in the case of welding, some people would raise the question: is it possible to weld on the galvanized pipe safely? Yes, but it needs the correct solution and measures of security.

Galvanized pipe welding may be a problem since the zinc finish emits fumes of heating. The fumes are toxic to inhale and therefore one needs to wear the right protective equipment, such as respirator mask, gloves and welding goggles. A fume extraction system or good ventilation is also extremely advisable in order to provide safety.

Welding should be done after clearing the welding point of the zinc layer. It can be done with a wire brush, grinder or chemical stripper. When clean steel is exposed it creates a stronger weld and minimizes the possibilities of weak spots or burn-through brought about by the zinc.

It is also important that the appropriate welding method is chosen. The welding done on galvanized steel is often MIG welding and TIG welding as this gives greater control and the joints are cleaner. It can also use stick welding but this should be done with more expertise in order to prevent defects. The filler material that should be used of the appropriate type that can be used with steel to preserve quality weld.

Once the weld is finished, one has to restore the protective coating. Use cold galvanizing spray or zinc-rich painting on an area of the welding. This acts as an anti-corrosive measure and is used to make sure that the pipe remains functional as time goes by. Welding can be avoided as a technique of joining galvanized pipes by mechanical fittings, threaded connectors, and connecting the pipes with other structures.

To conclude, welding of galvanized pipe can be done safely, well prepared, and technique wise. The main steps are removing the zinc coating, applying proper methods of welding, and applying protection back. Fine details and the appropriate equipment can result in strong, safe and long lasting welds in galvanized steel.