PP-R pipe specifications are expressed by pipe series S, nominal outer diameter dn × nominal wall thickness en:

Example: PP-R pipe series S5, PP-R nominal diameter dn25mm, PP-R nominal wall thickness en2.5mm

Expressed as S5, dn25×en2.5mm

PP-R pipe series S: It is a dimensionless numerical series used to express the specifications of pp-r pipes. The PVC transparent pipe production line has the following relationship: S=(dn-en)/2 en

Among them: dn——nominal outer diameter of PP-R, in mm; en——nominal wall thickness of PP-R, in mm

There are five series of commonly used PP-R pipe specifications: 5, 4, 3.2, 2.5, and 2

PP-R pipe specifications PP-R pipes are divided into five series: 11, 9, 7.4, 6, and 5 according to the standard size rate SDR value.

PP-R pipe specification PP-R standard size ratio SDR: is the ratio of the nominal outer diameter dn of the PP-R pipe to the nominal wall thickness en.

The relationship between PP-R pipe specification SDR and PP-R pipe series is as follows: SDR=2S+1

Representation method of PP-R pipe fitting specifications:

Nominal outer diameter dn of PP-R pipe fittings refers to the nominal outer diameter of PP-R pipes connected to PP-R pipe fittings. The wall thickness of PP-R pipe fittings should not be less than the wall thickness of PP-R pipes of the same PP-R pipe series S.

Most of the enterprise PP-R pipe fittings have only one series of standard S2, all the cold and hot water are tried out

PP-R pipe specification S5 series---------------1.25MPa (12.5kg)

PP-R pipe specification S4 series---------------1.6MPa (16kg)

PP-R pipe specification S3.2 series------------2.0MPa (20kg)

PP-R Pipe Specifications S2 Series--------------2.5MPa (25kg)