BL flange, also known as flange cover, is a type of flange part. It plays a role of sealing and protection in the connection of pipes, containers or other equipment. BL flange is usually used for the connection between two planes, and the sealing effect is achieved by bolting. This flange has a wide range of uses and is suitable for various industrial fields, including construction, light and heavy industries, plumbing, electricity, etc. The material of BL flange can be carbon steel, low alloy steel, stainless steel, etc. The specific choice depends on its use environment and requirements.

In addition, there are various classification standards for flanges, including classification by chemical, petrochemical, and mechanical industry standards, as well as classification by national standards and connection methods. As one of them, BL flange cover reflects the diversity and flexibility of flanges in industrial applications. In practical applications, choosing the right flange type and material is crucial to ensure the sealing and safety of the connection.