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                                                                      Blind flange

Blind flange is a flange without holes in the middle , for sealing the pipe plug. The effect is the same as the welding head and the threaded cap, except that the blind flange and the threaded cap can be removed at any time, while the welding head is not. There are many forms of sealing surface, such as full plane, bump surface, concave and convex surface, tenon groove surface and ring connection surface.