Walterscheid's hydraulic pipe fittings of the highest quality that can withstand high pressures in extreme environments. These pipe fittings for hydraulic pipes do not need to be welded to withstand extremely high pressures and pulsations. Walterscheid's fittings also have a unique surface treatment that makes them well suited for use in exposed environments. The surface treatment, Guardian Seal, is nickel-free and can withstand corrosion tests according to DIN EN ISO 9227 (1000-1100 h).