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Tygon tubing. Tygon is a brand name for a family of flexible polymer tubing consisting of a variety of materials to be used across a range of specialized fluid transfer requirements.[1] The specific composition of each type is a trade secret. Some variants have multiple layers of different materials.
For gas tungsten arc welding (GTAW), pure argon is more commonly used as a shielding gas. Helium/argon mixtures can be used for applications that require high heat transfer, but those applications arenât widespread. Pure helium or mixtures with a high percentage of helium sometimes are used with GTAW machines with direct current electrode negative.