DN225 steel pipe is a common steel pipe specification with a diameter of 225 mm and a wall thickness of 6 mm. It is commonly used in industrial, municipal engineering, and construction fields, such as water supply and drainage pipelines, oil and gas pipelines, and bridge support structures.

First, the characteristics of DN225 steel pipe
1. Material: DN225 steel pipe mainly uses carbon structural steel or low-alloy structural steel, which has good weldability and machinability.
2. Size: The diameter of DN225 steel pipe is 225 mm, the wall thickness is 6 mm, and the length is generally 6 meters, 9 meters, or 12 meters. Due to its large size, the weight is also correspondingly heavier.
3. Compression resistance: Due to the characteristics of its material and size, DN225 steel pipe has strong compression resistance and can withstand large pressure loads.
4. Corrosion resistance: The surface of DN225 steel pipe is often treated with anti-corrosion, which improves its corrosion resistance and can be used in harsh environments.

Second, the application field of DN225 steel pipe
1. Water supply and drainage pipeline: DN225 steel pipe is often used in water supply and drainage pipelines in municipal engineering, which can withstand large water pressure and water flow and have a long service life.
2. Oil and gas pipeline: DN225 steel pipe can also be used for oil and gas pipelines, and its pressure resistance and corrosion resistance can meet the needs of oil and gas transportation.
3. Bridge support structure: DN225 steel pipe can also be used in bridge support structures, such as support columns and beams. Its strength and stability can withstand the weight and load of the bridge.
4. Building structure: DN225 steel pipe can also be used in building structures, such as steel structure frames and support columns. Its size and material can meet the needs of building structure, and it has good plasticity and processability.

In short, DN225 steel pipe, as a common steel pipe specification, has strong pressure resistance and corrosion resistance and can be widely used in industry, municipal engineering, and construction.