Definition - What does Weight Coating mean?
Weight coating is an applied thin layer or covering used to protect pipelines in various applications by providing negative buoyancy. Weight coating is often used in offshore applications. Pipelines have a natural buoyancy that makes them float when placed in water; weight coating is used as a way to keep pipelines submerged.
Corrosionpedia explains Weight Coating
Weight coating is used in sub-sea pipelines, large diameter pipelines, swamp or muskeg applications, and small diameter pipelines. It can be effectively applied over insulation and anti-corrosion layers, providing a wide range of densities and thicknesses.