1.Standard

PP-R pipes of our company are produced in accordance with the National Standard ISO/DIS 15874-1999 "hot-cooling water plastic pipe system,polypropylene" .
 
2.Color

In order to distinguish this two pipes when hot-water pipe and cooling-water pipe are installed altogether,we directly import two colors PP-R raw materials from Borealis,blue color for cooling-water pipe,cafe color for hot-water pipe.  
 
3.Pressure grade

Our pipes includes S5,S4,S3.2,S2.5,S3.2 and S2.5 are applied to hot-water pipes system,S5,S4 and S3.2 are applied to cooling-water pipes system.

When we design pipes system,safe coefficient is 1.25 or 1.5 depending on customers requires.
 
International standard stipulated the safe coefficient of pipe system is 1.25
Pipe series:                         S5     S4     S3.2       S2.5
Nominal pressure MPa (C=1.25)       1.25    1.6     2.0       2.5
 
Table 2 relations between pipe series and PN(C=1.5)  
Pipe series                              S5    S4     S3.2      S2.5
Nominal pressure MPa (C=1.5)            1.0   1.25    1.6        2.0
 
4.Specification and size

The specification of pipe we are using are S series,expressed by nominal outside diameter multiplying nominal wall thickness(dnxen).

Our company's raw material for PP-R hot-cooling water pipes, pipe fittings adopts the number which is same with North Europe PP-R. Specifications we possess are D20, D25, D32, D40, D50, D63, D75, D90, D110 etc..

4 meters each pipe,and also we can cut the length depended on customers requirements.