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Preparation Of Metal Composite Panel For Pre - Welding

Commonly used pressure vessel composite steel plate is a kind of steel as a base layer, with another kind of steel or nonferrous metal as a composite layer, through hot rolling or explosion molding process and other methods of composite bimetallic plate. The main layer to meet the structural strength and stiffness requirements, generally with low carbon steel or low alloy steel; and the main layer is to meet the requirements of corrosion resistance, generally with chromium or chromium nickel stainless steel, nickel-based alloy, copper-based alloy or titanium board. The stratum is usually only 10% to 20% of the total thickness.Metal Composite Panel

Composite steel plate has both high quality and precious metal with special properties (such as corrosion resistance), but also can save a lot of precious metals such as stainless steel or titanium, while ensuring technical requirements can significantly reduce costs, with great economic value. Therefore, the composite steel plate in the petroleum, chemical, marine, medical, food industry and military production has been more and more widely used.Metal Composite Panel

As the pressure vessel with composite steel plate is generally in the petrochemical and other dangerous environments, both under pressure, the working medium is almost always a strong corrosive substances; and because the pressure vessel with a composite steel plate manufacturing process is more stringent, General manufacturers due to less contact, the process is not mature, often in the manufacture of some problems, such as the size of the cylinder material is not appropriate, weld creep rupture.Metal Composite Panel Composite steel plate shall not have the appearance of harmful defects on the use. The combined area of the grassroots and the stratum should account for more than 95% of the total area, and the local unbound area should not exceed 50cm2. Stronger stress (such as punching the head) or more heavy load (such as tube sheet) when using the composite steel plate more stringent requirements. The sum of all defects in the surface of the composite layer shall not exceed 20% of the composite area if it is not worn out. At the same time, the surface quality of the composite material should be compatible with the composite method, the thickness uniformity, the tolerance should meet the specified value.Metal Composite Panel