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Alloy steel pipe refers to a type of steel pipe that is made from alloyed steel materials. Alloy steel is a combination of different elements, such as carbon, manganese, chromium, nickel, molybdenum, and others, in varying proportions. These alloying elements are added to enhance the properties of the steel, such as strength, hardness, corrosion resistance, and high-temperature performance.

The structure steel pipe has hot – rolled seamless steel tube and welded steel tube.The seamless steel tube for structure is divided into two types according to the provisions of “seamless steel tube for structure”

ASTM A209 / A209M, ASME SA209 T1, T1a, T1b is the standard applicable to seamless carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes.

20MnG steel pipe is a type of steel pipe commonly used in high temperature and high pressure applications, commonly used in boilers, heat exchangers and other high temperature and high pressure equipment.