Patent ID: 8196801

Claim:
A method of brazing a gas line comprising the steps of: (a) forming a line under construction by positioning tubular sections and fittings together; (b) coupling a purge fitting at an end of the line under construction having an orifice therein for passing inert purging gas that is within the line, out of the line through the purge fitting orifice at the end of the line; (c) passing inert purging gas through the line; (d) while the inert purging gas is being passed through the line, measuring the oxygen content of the inert purging gas passing out of the line through the orifice in the purge fitting at the end of the line; (e) commencing brazing of the tubular sections and the fittings when measurement of the oxygen content of the inert purging gas indicates the absence of oxygen; and (f) continuing brazing of the line only while purging gas that is oxygen free continues to be passed through the line.