Gas For Welding Copper Pipe. Several welding standards specify the shielding gas to have a dew point of less than -40 degrees F condensate in the piping system is going to mean your dew point is going to be much higher for a period of time until all the moisture has evaporated. In truth both types of fuel will get the job done.
How to Choose the Right Material for Acetylene Piping and Pipeline Systems. The purity of the gas shall be certified by the manufacturer. However nitrogen cannot be used in the case of weld materials having a high nickel content.
Nitrogen argon or helium may be employed for inner protection.
However one hundred percent helium gas is currently gaining popularity. MAPP gas comes in a yellow tank and propane comes in a blue tank. Copper pipes are commonly used for a gas line for water supply lines in the manufacturing industry and for refrigerant lines in HVAC heating ventilation cooling and air conditioning systems. Copper is brazed using a phoscopper silver alloy with a nitrogen internal purge to prevent copper oxide from forming inside the copper tube.