Ductile cast iron pipe.
Flange flexible interface installation method:
1. Draw the mounting line on the socket. Take a 5-10mm clearance at the end of the socket. Draw the mounting line on the outer wall of the socket. The plane on which the mounting line lies should be perpendicular to the axis of the tube.
2. Insert the flange gland at the socket end, then insert the apron and align the edge of the apron with the mounting line.
3. Insert the socket into the socket, in order to maintain the same depth of the rubber ring in the socket, during the advancement process, try to ensure that the axis of the insertion tube and the axis of the socket are in the same line.
4. Tighten the bolts so that the apron is evenly stressed. The bolts must not be tightened once in place, but gradually and evenly one by one.