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Pipes Technology Performance
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| 1.Standard |
| Nowadays,China does not exist the formal nation PP-R pipe standard,the PP-R pipe 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. |
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| 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. |
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| 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. |
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| Table 1.International standard stipulated the safe coefficient of pipe system is 1.25 |
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Table 2 relations between pipe series and PN(C=1.5) |
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| 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. |
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