Purge system for vessels

This assembly is designed for welding vessels fitted with an inspection chamber and in the stated range of sizes. The vessel must be placed on turning rolls, and the legs on the column are adjustable so that the tool can be used for more than one size of vessel. The gas drag is held between the 11 o’clock and 1 o’clock positions by a balance weight when the vessel turns. The setting-up time is about 5-10 minutes, and the tool can be dismantled and removed through inspection chambers of Ø350 mm or more. The vessel must be circular ± 30 mm and suitable for TIG-welding. There is a special Schnorrer water-cooled gas-drag for plasma welding.