PPR pipe specifications are expressed using pipe series S, nominal outer diameter dn × nominal wall thickness en.
Example: PPR pipe series S5, PPR nominal outer diameter dn 25mm, PPR nominal wall thickness en 2.5mm, expressed as S5, dn 25 × en 2.5mm.
PPR pipe series S: A dimensionless numerical series used to represent PPR pipe specifications, with the following relationship: S = (dn - en) / 2 en
Where: dn-PPR nominal diameter (outer diameter), in mm en-PPR nominal wall thickness, in mm
Commonly used PP-R pipe specifications include five series: 5, 4, 3.2, 2.5, and 2.
PPR pipe specifications are also categorized into five series based on Standard Dimension Rate (SDR): 11, 9, 7.4, 6, and 5.
PPR Standard Dimension Rate (SDR): The ratio of the nominal outer diameter dn to the nominal wall thickness en of the PPR pipe.
The relationship between PPR pipe specification SDR and PPR pipe series is as follows: SDR = 2S + 1
The representation method of PPR pipe fitting specifications:
The nominal outer diameter dn of a PPR pipe fitting refers to the nominal outer diameter of the PPR pipe connected to the fitting. The wall thickness of the PPR fitting should not be less than the wall thickness of the PPR pipe of the same series S.
Most companies only have one series of PPR pipe fittings, the highest standard S2, which is suitable for both hot and cold water.
PPR pipe specification S5 series: 1.25 MPa (12.5 kg)
PPR pipe specification S4 series: 1.6 MPa (16 kg)
PPR pipe specification S3.2 series: 2.0 MPa (20 kg)
PPR pipe specification S2.5 series: 2.5 MPa (25 kg)
