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| HOME | PRODUCT | PIPES & FITTINGS | PPR Hot-cooling water pipes

Pipes Technology Performance

1.Standard
    Nowadays,China does not exist the formal nation PPR PIPE FITTNGS and PVC plastic profile standard,the PPR PIPE FITTNGS and PVC plastic profile our company product regards as the National Standard ISO/DIS 15874-1999 "hot-cooling water plastic pipe system,polypropylene" and we also stipulated it into our enterprise standard,according to this standard to produce and detect.

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,for detail,please see table 1 or table 2.

Table 1.International standard stipulated the safe coefficient of pipe system is 1.25

Table 2 relations between pipe series and PN(C=1.5)

4.Specification and size
The specification of pipe we are using are S series,expressed by nominal outside diameter multiplying nominal wall thickness(dnxen),see fig.1.
Wall thickness relations among pipe outside diameter,mean outside diameter,pipe series,see
table 3.