Purging a main involves inducing an inert Gauze into the channel to remove reactive atmospheric gases from the welding nature. An inert Gauze atmosphere eliminates oxidation from forming on the bottom of the weld. Oxidation forming on the bottom or inside of the weld increases friction encompassing the weld Seam and causes structural weakness provided the oxidation leads to porosity. Benefit the identical type of inert Gauze for both welding and purging which increases the stability of the weld.
Instructions
1. Include one speck of the pipe with masking tape. Divide a dwarf "X" in the centre of the masking tape covering the deadline of the main with a servicing cutter.
2. Thread a gas regulator onto a bottle of inert gas. Allow the pipe to fill with gas for one to five minutes depending on pipe diameter. Cover the cut "X" with masking tape to hold the inert gas in the pipe.6. Allow the inert gas to continue to flow as you weld the pipe seam.
4. Cover the open end of the pipe with masking tape, securing the hose inside of the pipe.
5. Purge the pipe. Turn the valve onto of the gas bottle counterclockwise to begin gas flowing into the pipe. Tighten the regulator with an adjustable wrench.3. Slide the hose coming from the gas regulator into the open end of the pipe.
