PPR pipe profiles and production processes 
 Introduction 
 PPR is the abbreviation of the Sanbing polyethylene, also known as random copolymer polypropylene tubes, using the heat fusion of the way, special welding and cutting tools, a higher degree of plasticity. The price is also very economic. Is also very good insulation properties, the wall is also very smooth, the general price of $ 6-12 per m (4 charge), not including inside and outside the wire connector. Generally embedded in walls, or deep embedded pipe. PPR pipe affordable, stable performance, heat insulation, corrosion resistance, smooth wall, no scaling, safe and reliable pipeline system does not penetrate, the useful life of up to 50 years. But the construction technical requirements, requires the use of special tools and professionals in construction, in order to ensure system security. 
 PPR pipe production process 
 Raw materials + masterbatch → materials → raw material mixing → vacuum drying → single screw extruder → screw extrusion machine → color line 

 PPR Pipe Production Line 
 [1] 
 Rotating mold → sizing sets of vacuum forming → spray box → inkjet printer of spray cooling water tank → → crawler tractor → product testing, packaging PPR pipe specifications 
 PPR pipe size pipe series S, the nominal outside diameter dn × nominal wall thickness en 
 Example: PPR pipe series S5, the PPR public that diameter dn25mm, PPR nominal wall thickness en2.5mm 
 Expressed as S5, dn25 × en2.5mm 
 PPR pipe series S: is a dimensionless numerical series to indicate ppr pipe specifications, the following relationship S = (dn-en) / 2 en 
 Of which: dn - PPR nominal outside diameter, in mm 
 en - PPR nominal wall thickness, in mm 
 5,4,3.2,2.5,2 five series of commonly used PP-R pipe specifications 
 PPR pipe specifications PPR pipe SDR value of the standard size rate five series 11,9,7.4,6,5. 
 PPR pipe specifications PPR standard size rate of the SDR: PPR pipe the public that the ratio of outside diameter dn and nominal wall thickness of the en. 
 PPR pipe specifications SDR and PPR pipe series are as follows: the SDR = 2S +1 
 PPR pipe parts specifications representation: 
 PPR fittings nominal outside diameter dn refers to PPR fittings PPR pipe connected to the nominal outside diameter. PPR pipe wall thickness shall not be less than the same PPR pipe series S of PPR pipe wall thickness. 
 Most of the enterprises PPR pipe pieces have only the highest standards of S2 a series of hot and cold water trial 
 PPR pipe specifications S5 Series -------------- 1.25 MPa (12.5 kg) 
 PPR pipe specifications S4 series -------------- 1.6 MPa (16 kg) 
 PPR pipe specifications S3.2 Series ------------ 2.0 MPa (20 kg) 
 PPR pipe specification S2 Series -------------- 2.5 MPa (25 kg)