Flange cover is also called blind flange and blind plate. It is a flange with no hole in the middle to seal the pipe plug. The function is the same as that of the welding head and the threaded pipe cap, except that the blind flange and the threaded pipe cap can be removed at any time, while the welding head cannot.
There are many types of sealing surfaces, such as plane, convex surface, concave-convex surface, tenon-groove surface and ring connection surface.
Extended data:
Production technology of blind flange
(1) Put the selected raw steel into an intermediate frequency electric furnace for smelting, so that the temperature of molten steel can reach 1600- 1700℃.
(2) preheating the metal mold to 800-900 DEG C and keeping the temperature constant.
(3) Start the centrifuge and inject the molten steel in step (1) into the preheated metal mold in step (2).
(4) naturally cooling the casting to 800-900 DEG C and keeping it for 1- 10 minute.
(5) cooling to near normal temperature with water, demoulding and taking out the casting.
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