PPR pipe specifications are expressed by pipe series S, nominal outer diameter dn × nominal wall thickness en
Example: PPR pipe series S5, PPR nominal outer diameter dn25mm, PPR nominal wall thickness en2.5mm
Expressed as S5, dn25×en2.5mm
PPR pipe series S: It is a dimensionless numerical series used to express the specifications of ppr pipes, with the following relationship S=(dn-en)/2 en
Among them: dn - PPR nominal diameter (outer diameter), the unit is mm
en——nominal wall thickness of PPR, in mm
There are five series of commonly used PP-R pipe specifications: 5, 4, 3.2, 2.5, and 2
PPR pipe specifications PPR pipes are divided into five series: 11, 9, 7.4, 6, and 5 according to the standard size rate SDR value.
PPR pipe specification PPR standard size ratio SDR: is the ratio of the nominal outer diameter dn of the PPR pipe to the nominal wall thickness en.
The relationship between PPR tube specification SDR and PPR tube series is as follows: SDR=2S+1
Representation method of PPR pipe fittings specifications:
Nominal outer diameter dn of PPR pipe fittings refers to the nominal outer diameter of the PPR pipe material connected to the PPR pipe fittings. The wall thickness of the PPR pipe fittings shall not be less than the wall thickness of the PPR pipes of the same PPR pipe series S.
Most of the enterprise PPR pipe fittings have only one series of the highest standard S2, which is suitable for all hot and cold water.
PPR pipe specification S5 series---------------1.25MPa (12.5kg)
PPR pipe specification S4 series---------------1.6MPa (16kg)
PPR pipe specification S3.2 series ------------ 2.0 MPa (20 kg)
PPR pipe specification S2.5 series -------------- 2.5MPa (25kg)