(1)PVC-U rigid polyvinyl chloride plastic pipe: 1) If the valve is internally threaded, an externally threaded transition joint shall be adopted. One end of this transition joint is external thread, and the other end is a socket that can be bonded with plastic pipe.
2) If the valve is an external thread valve, an internal thread transition joint shall be adopted. One end of this transition joint is internally threaded, and the other end is a socket that can be bonded with a plastic pipe.
3) If the valve is a flange valve, the PVC-U pipe should be connected with the valve through the flange. The connection between plastic pipe and flange can be bonding, flaring and flange connection or flange connection.
(2) Connection between PP-R pipe and valve: 1) If the valve is an internally threaded valve, an externally threaded transition joint shall be adopted. One end of this transition joint is external thread, and the other end is a socket which can be connected with PP-R plastic pipe by hot melt.
2) If the valve is an external thread valve, an internal thread transition joint shall be adopted. One end of this transition joint is internal thread, and the other end is a socket which can be connected with PP-R plastic pipe by hot melt.
3) If the valve is a flange valve, the connection between the PP-R pipe and the valve shall be a flange connection. The connection between plastic pipe and flange can be hot melt connection, flared flange or flanged ring.
(4)PE pipes, PB pipes and valves are connected in the same way as PP-R pipes.
(5)PVC-C pipes, ABS pipes and valves are connected in the same way as PVC-U pipes.
(6)PE-X pipe and Babbitt pipe, which have smaller specifications, are connected by clamping and clamping, and the valve should be connected by clamping or clamping transition joint. For example, the connection between PE-X pipe and internally threaded valve requires an externally threaded ferrule transition joint. One end of this joint is externally threaded and connected with the valve, and the other end is a ferrule joint connected with PE-X. ..