Automated GTAW Water Tank Manufacture and Gas Wastage
TVC was approached by a company who manufacture Duplex water tanks and use a forming gas for back purging the tanks. As the welding process is automated GTAW, the operation process involves setting up a tank to purge whilst a pre-purged tank is being welded.
Prior to purchasing TVC Oxygen monitoring and flow control equipment, the initial purge was carried out by ensuring that the purge, at a high flow rate, was maintained for a set period of time. The drawback to this method was, however, that the time the tank was on purge could often exceed the nominal time required to fully purge the vessel and, therefore, wasted a large volume of gas. (more…)