200mm HDPE Pipe welding machine Manufacturers

The nominal outer diameter dn of PPR water pipe fittings refers to the nominal outer diameter of the PPR water pipe connected to the water pipe. There is a requirement for the key wall thickness of PPR water pipes, which requires that it should not be less than the wall thickness of the same PPR water pipe series S pipe. In other words, the wall thickness of the pipe fitting must be greater than or equal to the wall thickness of the pipe.