How can the old water pipe ductile iron pipe be opened with three flanges?
There are finished products with flanges, but they are not easy to buy. They are basically useless. Now basically the adoption of the pipe, so it is recommended to use the tray flange, disk plug: one for the flange, one for the socket; socket: one for the mouth, one for the socket. According to the diameter of pipe fittings, there are usually equal diameter three pass, different diameter three pass and so on. According to the direction of branch pipe, there are three straight and oblique three. In accordance with the connection mode, there are three ordinary, threaded three pass, card sleeve three, and socket three. The connecting flange of the sleeve is connected with the connecting angle of the bearing mouth, and the telescopic device can also be used. The connection between the pipe and the pipe adopts the form of socket type or flange disk interface. According to the function, it can be divided into two kinds: flexible interface and rigid interface. The flexible interface is sealed with rubber ring, which allows a certain degree of corner and displacement, so it has good seismic resistance and tightness, and it is easy and quick to install than rigid interface.
Cast iron pipe is not good then did not take the treatment is not good in the local search do you master plumbing to the scene to see the actual situation, some teachers have you unexpected strain interpretation way.
First, the new process adopted; groove connection. With groove pieces, of course, ductile iron pipes should also be grooved pipes.Two, the old process1. dozen to lead lead; cut into strips, with a file play in the interface2. use expanded cement with asbestos3 use the asphaltBecause the interface material used in the old process is poisonous, especially in the water supply pipeline, environmental protection requires a new process now.