A carbon steel flange is a type of flange that is made of carbon steel. Carbon steel is a type of steel that contains carbon as its primary alloying element. The carbon content in carbon steel can vary from 0.002% to 2.1%, but most carbon steels have a carbon content of between 0.2% and 0.8%. he following are some of the key technical specifications of carbon steel flanges: Pressure rating: The pressure rating of a flange is the maximum pressure that the flange can withstand without leaking. Class: The class of a flange is a measure of the flange's strength. The higher the class, the stronger the flange. Size: The size of a flange is the diameter of the flange's bore. Type: There are many different types of carbon steel flanges, including slip-on flanges, weld neck flanges, and socket weld flanges. Finish: The finish of a flange is the surface texture of the flange. The most common finishes for carbon steel flanges are smooth and rough. Carbon steel flanges are a versatile and reliable type of flange that can be used in a variety of applications. They are available in a wide range of sizes, classes, and types, so you can find the perfect flange for your needs. The technical specifications of a carbon steel flange vary depending on the standard that it is manufactured to. Some of the most common standards for carbon steel flanges include: ASTM A105N (SA105N): This standard specifies the requirements for carbon steel forgings for piping applications. ASTM A350 LF2: This standard specifies the requirements for low-alloy steel forgings for piping applications. ASTM A694: This standard specifies the requirements for flanges for high-pressure service. The following are some of the key technical specifications of carbon steel flanges: Material: Carbon steel Pressure rating: Varies depending on the standard Temperature rating: Varies depending on the material and the standard Face type: Plain, raised face, or ring joint Bore size: Varies Wall thickness: Varies Finish: Varies