For the corrosion protection of the pipelines, many types of coating and wrapping are applied. Among them plastics coating offers superior corrosion resistance.
Huashida as a world wide line pipe manufacturer, developed a high quality polyethylene(PE) or polypropylene(PP) coated steel pipe for the transmission of gas, oil, water and other fluids with highly resistant to corrosion from moisture, chemicals and other harmful substances. 
Huashida steel pipe elbow external coating pipe is produced by a process of coating wirh a primer and polyethylene(PE) or polypropylene(PP) layer for small and medium diameter by extruded method, and for large diameter by the spiral wrapping method. These facilities are the largest in the world in terms of production capacity and product size avaliable.