... 12 production lines 10,000 m / day Description:Our PPR pipes are classified as 5 pressure grade including S2, S2.5 ... 20 mm to 160mm. S4 and S5 series are of cold water pipes, the liquid temperature with normal use should be lessthan ... , S2, S2.5, S3.2 series are of hot water pipes, the liquid temperature with normal use should be less than ...