Brass Compression Elbow 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.

During the production of PPR water pipes, adding calcium carbonate has two main adverse effects on PPR water pipes. First, and most importantly, the addition of calcium carbonate will reduce the mechanical properties of PPR water pipes and affect the static pressure strength of water pipes. Compared with PPR pipes with good mechanical properties, such water pipes are more prone to pipe burst accidents.