A blind flange is a solid disk used to block off a pipeline or to create a stop. It is machined in the same manner as a regular flange with the mounting holes around the perimeter and the gasket sealing rings machined into the mating surface. The difference is that a blind flange has no opening to allow fluid to pass through. The blind flange can be inserted between two open flanges and used to block off the flow of liquid through a pipeline.
Often a blind flange is inserted into a pipeline when a repair is required further up the line. This allows the flanges downstream to be disconnected without fear of losing liquid. Many times this type of blockade is used when adding another line onto an existing pipeline or when a new valve is being added. This blockade is also used to shut down a line when it is no longer needed.
ANSI B16.5, ASME B16.47, DIN, JIS, GB, BS etc...
Carbon steel, stainless steel, alloy steel etc.
As customer's requirement
ANSI: Class 75, Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500;
Anti-rust oil, Transparent oil ,Zinc Galvanized or as customer's requirement
Blank or as customer's requirement