Boiler and Pressure Vessel Steel Plate is used for many applications where the pressure inside is significantly higher than atmospheric pressure.Pressure vessel steel plate covers a range of steel grades that are designed for use in pressure vessel, boilers, heat exchangers and any other vessel that contains a gas or liquid at high pressures.BBN steel main Boiler and Pressure Vessel Steel grade:09CuPCrNi-A, 05CuPCrNi, SPA-H, SPA-C, B480GNQR,Q355GNHD,Q355NHD, S355J0WP, CORTEN-A