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PVC-U Metric Pipes, Fittings & Valves Technical Information


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PVC-U METRIC PIPE SYSTEMS

PVC-U (Unplasticised polyvinyl chloride) is one of the most popular thermoplastic materials used for pipework installations. Light in weight PVC-U has excellent resistance to chemicals and abrasion, is tasteless and odourless making it ideal for use with potable water systems and most food products as its extremely smooth bore gives excellent flow characteristics without sediment or deposit.

PVC-U is resistant to most solutions of acids, alkalis, salts and solvents.

Connections can be made by either solvent cement or BSP threaded fittings.

PVC-U Products are clearly identified by their dark grey colour.

WRAS Approval

PVC-U is approved by the Water Research Advisory Scheme (WRAS) for use with potable water.

Standards

PVC-U pipe is manufactured in accordance with EN1452-2

PVC-U fittings are manufactured in accordance with EN1452-3 and ISO161/1

Chemical Resistance

PVC-U has chemical resistance properties which are excellent being resistant to most solutions of salts, acids, alkalis and water soluble solvents. These products are NOT resistant to aromatic or chlorinated hydrocarbons.

For information on specific chemical resistance for PVC-U please contact our sales department on 0845 166 7590 or email sales@comeruk.com.

PVC-U System Pressure/Temperature Relationship

Pressure ratings for plastic pipework systems are always quoted at 20 ° C, it is a fundamental principle of such systems that if the temperature is increased then the pressure rating must be reduced.  PVC-U systems should never be used for temperatures in excess of 60 ° C.  The following chart gives a rough guide as to the temperature/pressure relationship of PVC-U pipework systems.

  20 ° C 30 ° C 40 ° C 50 ° C 60 ° C
PN4 4.0 BAR 3.2 BAR 2.3 BAR 1.5 BAR 0.8 BAR
PN6 6.0 BAR 4.8 BAR 3.4 BAR 2.3 BAR 1.3 BAR
PN10 10.0 BAR 8.0 BAR 5.8 BAR 3.9 BAR 2.2 BAR
PN16 16.0 BAR 12.8 BAR 9.2 BAR 6.2 BAR 3.5 BAR

PVC-U Pipework Support Centres

In above ground installations it is essential to provide support to ensure that the weight of the pipe and its contents are adequately supported.  The following recommended maximum spacings are for PVC-U pipes operating under the following conditions:

1)  Fluid density of not more than 1g/cm cubed
2)  PN10/PN16 pipe
3)  Horizontal pipe runs

PIPE OD
mm
20 ° C 30 ° C  40 ° C
50 ° C 60 ° C
  SPACING GIVEN IN METRES
16 0.80 0.70 0.50    
20 0.90 0.80 0.60    
25 0.90 0.80 0.60 0.50 0.40
32 1.00 0.90 0.70 0.60 0.40
40 1.20 1.10 0.90 0.70 0.50
50 1.40 1.30 1.10 0.80 0.60
63 1.50 1.40 1.20 0.90 0.70
75 1.60 1.50 1.30 1.10 0.80
90 1.80 1.70 1.50 1.20 0.90
110 2.00 1.90 1.70 1.40 1.10
125 2.10 2.00 1.80 1.60 1.20
140 2.20 2.10 1.90 1.70 1.40
160 2.40 2.30 2.10 1.80 1.50
180 2.50        
200 2.70 2.40 2.30 2.00 1.70
225 2.80 2.60 2.40 2.10 1.80
250 3.00        
280 3.20        
315 3.40        

For vertical pipe runs spacing should be increased by 30%.
For PN16 Pipe Support centres may be increased by 10%.

Cement Usage Recommendations

The following is an estimation of the number of joints likely to be achieved per litre of solvent cement.

OUTSIDE
DIAMETER
NUMBER OF
JOINTS
TYPE & SIZE
OF BRUSH
NUMBER
OF PEOPLE
6 - 12 300 3/16" Round 1
16 - 20 180 3/8" Round 1
25 - 32 100 1" Flat 1
40 - 63 50 2" Flat 1
75 - 90 20 2" Flat 2
110 - 125 10 2" Flat 2
140 - 180 8 2.1/2" Flat 3
200 - 250 3 3" Flat 3
250 - 315 2 3" Flat 3

For larger diameter installations we are able to offer 5 litre tins of slower setting solvent from stock.

PVC-U Metric Pipe Dimensions
 

PIPE O D (mm) MAX W P WALL (mm) WEIGHT KG/M
6 16 1.00 0.025
8 16 1.00 0.035
10 16 1.20 0.045
12 16 1.40 0.055
16 16 1.50 0.110
20 10 1.10 0.150
  16 1.50 0.140
25 10 1.50 0.190
  16 1.90 0.220
32 10 1.60 0.250
  16 2.40 0.360
40 6 1.80 0.334
  10 1.90 0.360
  16 3.00 0.550
50 6 1.60 0.380
  10 2.40 0.570
  16 3.70 0.840
63 6 2.00 0.590
  10 3.00 0.890
  16 4.70 1.340
75 4 1.80 0.642
  6 2.30 0.810
  10 3.60 1.270
  16 5.60 1.900
90 4 1.80 0.774
  6 2.80 1.180
  10 4.30 1.820
  16 6.70 2.710
110 4 2.20 1.140
  6 2.70 1.450
  10 4.20 2.200
  16 6.60 3.320
125 4 2.50 1.470
  6 3.10 1.890
  10 4.80 2.830
  16 7.40 4.240
140 4 2.80 1.840
  6 3.50 2.400
  10 5.40 3.610
  16 8.30 5.390
160 4 3.20 2.380
  6 4.00 3.140
  10 6.20 4.700
  16 9.50 7.030
180 4 3.60 3.000
  6 4.40 3.870
  10 6.90 5.890
  16 10.70 8.890
200 4 4.00 3.700
  6 4.90 4.750
  10 7.70 7.300
  16 11.90 10.970
225 4 4.50 4.670
  6 5.50 6.000
  10 8.60 9.170
  16 13.40 13.900
250 4 4.90 5.650
  6 6.20 7.460
  10 9.60 11.360
  16 14.80 17.030
280 4 5.50 7.080
  6 6.90 9.310
  10 10.70 14.160
  16 16.60 21.330
315 4 6.20 8.950
  6 7.70 11.680
  10 12.10 17.960
  16 18.70 27.020
355 4 7.00 11.400
  6 8.70 15.010
  10 13.60 22.780
400 4 7.9 14.500
  6 9.8 18.820
  10 15.3 28.790
500 4 9.8 22.400
  6 12.3 29.400
630 4 12.3 37.510
  6 18.4 49.000
800 4 15.6 61.540
  6 23.3 88.650

Key:
N B = Nominal Bore
O D = Outside Diameter
W P = Working Pressure

Fitting Dimension Downloads

Click here to view available fitting dimension downloads.