A type flexible interface cast iron drainage pipe and pipe fittings series products are based on GB/T12772-2016 ‘drainage flexible interface cast iron pipe, pipe fittings and accessories’ national standard production, the use of socket interface and pipe fittings with flange gland, sealing ring, fastening bolts in the form of connection. It has the characteristics of good sealing effect, strong impact resistance, excellent seismic performance, fast installation, easy maintenance and reliable performance.

A flexible interface cast iron drainage pipe and pipe fittings installation method 
1, first intercept the corresponding length of the straight pipe, after cutting should ensure that the section and the axis of the straight pipe perpendicular to the smooth and neat fracture, no flying edge burr, so as not to scratch the rubber sealing ring; 
2, in the straight pipe or pipe fittings socket above the insertion of the depth of the marking line, depth marking line of the cross section of the vertical and the axis of the straight pipe or fittings, the socket and the socket end of the joints should be retained for about 5mm gap; 
3, the flange gland, rubber sealing ring in turn into the straight pipe or fitting socket end, the upper edge of the rubber sealing ring and straight pipe or fitting socket end above the insertion of good depth marking line aligned; 
4, the socket end into the socket, and keep the rubber sealing ring in the socket in the depth of the same, the installation of special attention should be paid to the direction of the socket pointed out for the direction of the flow of water; 
5, from the top down to the bolts, tighten the bolts should be angular cross. When tightening the bolts, the angles should be crossed, and tighten them evenly one by one, so that the rubber sealing ring is evenly stressed.