... certification : CEelectric water heater element/part Features The structure of tubular electric heating element is in ... excellent electrical insulation properties and resistance to high electric strength . Safe using and reliablity, is the ... pipe, welded pipe, copper, yellow brass pipe, carbon steel pipe Common diameter:Φ22,Φ20,Φ18,Φ16,Φ14 ... users6)Quality certification : CE TUV Electric Heater Pipe