The formal name of the blind disk is Flange cover, and some are also called blind flange or tube plug. It is a flange without a hole in the middle, which is used to seal the pipe opening. The function is the same as that of the head and the tube cap, but the blind seal is a detachable sealing device, and the seal of the head is not ready to be opened. There are many types of sealing surface, including plane, convex surface, concave and convex surface, mortise and groove surface and ring connection surface. Materials are carbon steel, stainless steel, alloy steel, copper, aluminum, and plastic CPVC, PPH, PVDF and so on.
Sealing Surface
There are many types of sealing surfaces, such as flat, convex, concave and convex, grooved surface and ring joint surface.
Material Types and Standards
Blind Flange material usually required in carbon steel, stainless steel, alloy steel, copper, aluminum and etc.
Carbon steel blind flange: ASTM A105
Alloy steel: ASTM A182 F5, F9, F11, F22, F91
Stainless steel blind flange: ASTM A182 F304/L, F316/L
Manufacturing Standards
ASME B16.5/BS 3293/DIN 86029
Dimensions
General use OD range: 1/2'', 2'', 3'', 4'', 6'', 8'', 10'', 12'', to 24”.
Special made OD: Up to 60”.
Class range: Class 150, Class 300, 400, 600, 900, 1500, 2500
Flange face type: RF (Raised Face), RTJ (Ring Type Joint)
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