Flange cover

Some flange covers are also called blind flanges  pipe plugs. It is a flange without a hole in the middle, which is used to plug the pipe opening. The function is the same as that of the head  the cap, except that the blind plate seal is a removable sealing device,  the seal of the head is  ready to be opened again. There are many types of sealing surfaces, including flat surfaces, convex surfaces, concave-convex surfaces, tongue  groove surfaces,  ring connecting surfaces.