厦门科恒塑胶有限公司

xiamen keheng plastic co.,ltd

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UPVC/CPVC Piping System

1.1.1 Material Characteristic

Polyvinyl chloride is produced by polymerization of the monomer vinyl chloride (VCM). PVC is used in construction, sewerage pipes and other pipe applications because of its biological and chemical resistance and workability.  It’s more effective than traditional materials such as copper, iron or wood in pipe and profile applications.

 Unplasticised Poly Vinyl Chloride (UPVC) is a rigid form of PVC often used in the building industry as a low-maintenance material.

CPVC is PVC (polyvinyl chloride) that has been chlorinated.  Depending on the method, a varying amount of chlorine is introduced into the polymer allowing for a measured way to fine tune the final properties. The chlorine content may vary from manufacturer to manufacturer; the base can be as low as PVC 56.7% to as high as 74% by mass, although most commercial resins have chlorine content from 63% to 69%. 

CPVC can withstand corrosive water at temperatures greater than PVC, typically 40°C to 50°C (104°F to 122°F) or higher, contributing to its popularity as a material for water piping systems in residential as well as commercial construction.

1.1.2 Introduction to UPVC/CPVC Piping System
1.1.3 Physical Properties
1.1.3.1 Physical Properties for UPVC

Item
Unit
Standard Value
Standard
Density
kg/m³
1350~1460
ISO 1183
Vicat
Pipes ≥80,Fittings ≥74
ISO 2507
Tensile Strength
MPa
≥40
ISO 6259
Impact Strength
KJ/m²
11.0
ISO 179
Vertical Retraction Ratio
%
≤5
ISO 2505
Drop-weight Test(0 ℃)
TIR
≤10%
ISO 3127

1.1.3.2 Physical Properties for CPVC
Item
Unit
Standard Value
Standard
Density
kg/m³
1450~1650
ISO 1183
Vicat
Pipes ≥110,Fittings ≥103
ISO 2507
Tensile Strength
MPa
≥50
ISO 6259
Impact Strength
KJ/m²
8.0
ISO 179
Vertical Retraction Ratio
%
≤5
ISO 2505
Drop-weight Test(0 ℃)
TIR
≤10%
ISO 3127

1.1.4 Temp & Pressure relation between UPVC and CPVC pipelines
The operating pressure in the UPVC and CPVC pipelines at higher temperatures is listed in the following table, with the pressure at the at normal operating temperature 23℃ scaled to be 100%
73
80
90
100
110
120
130
140
150
160
170
180
190
200
210
23
27
32
38
43
49
54
60
66
71
77
82
88
93
99
UPVC
100%
90%
75%
62%
50%
40%
30%
22%
0%
0%
0%
0%
0%
0%
0%
CPVC
100%
100%
91%
82%
73%
65%
57%
50%
45%
40%
32%
25%
22%
20%
0%
Note: UPVC pipes with screws should not be operated over 110 ℉(43℃); CPVC ones should not be operated over 150℉(66℃)