Series code.
The commonly used PP-R pipe specifications are 5, 4, 3.2, 2.5, and 2 series.
PPR pipe specifications PPR pipes are divided into five series of 11, 9, 7.4, 6, and 5 according to the standard size rate SDR value.
PPR pipe specification PPR standard size rate SDR: the ratio of the nominal outer diameter dn of the PPR pipe to the nominal wall thickness en.
The relationship between PPR tube specifications SDR and PPR tube series is as follows: SDR=2S+1.
The representation method of PPR pipe fitting specifications:
Nominal outer diameter of PPR fittings dn refers to the nominal outer diameter of PPR pipes connected with PPR fittings. The wall thickness of PPR pipe fittings should not be less than the wall thickness of PPR pipes of the same PPR pipe series S.
Most companies have only one series of PPR pipe fittings, the highest standard S2, which is suitable for all hot and cold water.
PPR tube specification S5 series-1.25 MPa (12.5 kg).
PPR tube specification S4 series-1.6 MPa (16 kg).
PPR tube specification S3.2 series-2.0 MPa (20 kg).
PPR tube specification S2.5 series-2.5 MPa (25 kg).