The internal coating with friction reducing resins has a high chemical resistance and improves the flow of the fluids transported by reducing the surface roughness improving therefore internal inspection, reducing pollution and sediments.

The internal surface is sandblasted by metallic grit up to SA 2.5 – SA 3 grade according to ISO 8501-1 standard, then epoxy resins starting from 50 microns are applied using airless bimixer. After drying the coating is visually inspected, checked on dimension (thickness) and technologically tested.