When selecting high-pressure carbon steel pipes, pipe diameter, wall thickness, and pressure rating are key parameters. Regarding pipe diameter, common specifications range from DN15 to DN300. Smaller diameters, such as DN15, are often used for instrument connections, enabling precise fluid transport; larger diameters, such as DN300, are mostly used in large industrial piping systems to meet high-flow-rate requirements. In terms of wall thickness, there are different series s...