The 3-Layer Coating System, also called the extrusion method, is one of the most effective methods for corrosion and mechanical protection for buried pipelines. Epoxy powder is the first layer (primer) of the 3-Layer-Coating System. The second (intermediate) layer is an adhesive layer and the third layer is the Polyolefin Top-layer. Depending on the function and service properties of the pipeline the third layer will be a PE or a PP layer.
Al-Qahtani Pipe Coating was the first in Saudi Arabia and the Middle East to apply 3-layer polyethylene coating on 80” diameter pipes for a Saline Water Conversion Corporation (SWCC) water pipeline project. It was a technological achievement to be able to perform such a difficult coating on a very large diameter pipe in accordance to stringent specifications. By this success, client’s such as SWCC are not relieved of past design constraints and can now design their future projects based on this higher diameter coating capability of AQPCI. 3-Layer polyethylene or polypropylene can be applied to pipes sizes ranging from 3” and up to 80” diameter.