What is a water stop ring? Which part of the waterproof casing is it in?

Water stop ring and water stop piece is the same for through the structure construction joints and cracks in the steel, pipes and other more susceptible to rusting iron specially developed system water expansion water stop new products.
 
Is a steel plate welded to the casing used to prevent leakage of the ring plate, it and shear wall construction joints buried steel plate waterstop the same role, the principle is very simple, is to add several times the extension of the path of water infiltration, greatly increasing the resistance to infiltration to achieve the purpose of anti-seepage.
 
Waterstop ring function and waterstop sheet the same definition system water expansion waterstop new products note that the casing through the wall is generally not used waterstop ring waterstop ring.
 
Waterstop ring and waterstop piece is the same for through the structure construction joints and cracks in the steel, pipes and other more susceptible to rusting iron pieces.