Standard System for Blind Flange

　　Blind flanges is a kind of disc-shaped parts, which is most common in pipeline engineering. Flanges are used in pairs. At present, there are many and incomplete application standards for pressure pipelines and their components in China. Taking Blind flanges standard as an example, the commonly used standards are national standard (GB), mechanical industry standard (JB), petrochemical industry standard (SH) and chemical industry standard (HG). These standards have their own temperature-pressure gauge, sealing surface size and tube size, which are not interchangeable with each other, and some of them can not even be used together.In pipeline engineering, ASTM A105 Class300 RF Carbon Steel Blind Flange is mainly used for pipeline connection. In pipelines that need to be connected, all kinds of Blind flanges are installed. Wire-jointed flanges can be used in low-pressure pipelines, and welding Blind flanges can be used under pressure of more than 4 kg.

　　A sealing point is added between the two Blind flanges and then fastened with bolts. Blind flanges under different pressures have different thickness and bolts. When the pump and valve are connected with the pipeline, the parts of these equipment are also made into corresponding flange shape, also known as flange connection. Connecting parts that are bolted and closed at the same time on the two planes. Blind flanges can play a good role and value in a certain field and industry, fully play a certain role, need to constantly produce certain functions and values, have certain performance and advantages in pipeline connection, play an important value and trend.