Why factory-coated tubing?
The process of factory-coating copper tubing provides many benefits. One key benefit is added corrosion protection. The color of the polyethylene coating helps to identify tube contents quickly (i.e. Gas-Tec is coated yellow for gas). The coating also allows the tubing to be continuously line-marked to help identify tube contents, ASTM specification and size. The tubing is also marked with lot numbers, which allow the tubing to be traced back to the origin of manufacture.