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PVC-U Imperial Pipes, Fittings & Valves Technical Information


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PVC-U IMPERIAL 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 BS3505/EN1452-2

PVC-U fittings are manufactured in accordance with BS4346 Part 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
CLASS C 9.0 BAR 7.2 BAR 5.2 BAR 3.5 BAR 2.0 BAR
CLASS D 12.0 BAR 9.6 BAR 6.9 BAR 4.6 BAR 2.6 BAR
CLASS E 15.0 BAR 12.0 BAR 8.7 BAR 5.8 BAR 3.3 BAR


PVC-U Pipework Dimensions

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)  PN15 pipe
3)  Horizontal pipe runs

NOMINAL BORE 20 ° C 30 ° C 40 ° C 50 ° C 60 ° C
  SPACING GIVEN IN METRES
1/4" 0.69 0.64 0.56 0.46 0.35
3/8" 0.74 0.69 0.61 0.51 0.40
1/2" 0.83 0.76 0.69 0.58 0.45
3/4" 0.93 0.86 0.76 0.64 0.51
1" 1.04 0.96 0.86 0.72 0.57
1.1/4" 1.13 1.06 0.94 0.80 0.62
1.1/2" 1.21 1.12 1.00 0.85 0.66
2" 1.35 1.25 1.12 0.88 0.74
2.1/2" 1.55 1.45 1.26 1.03 0.85
3" 1.64 1.53 1.36 1.14 0.90
4" 1.86 1.73 1.55 1.30 1.02
5" 2.06 1.92 1.71 1.44 1.13
6" 2.26 2.09 1.87 1.58 1.24
8" 2.51 2.33 2.08 1.75 1.37
10" 2.80 2.61 2.32 1.96 1.54
12" 3.05 2.83 2.53 2.14 1.68
14" 3.19 2.98 2.65 2.23 1.75
16" 3.42 2.18 2.83 2.39 1.87
18" 3.63 3.38 3.01 2.67 1.99
20" 3.83 3.56 3.17 2.9 2.09
24" 4.19 3.89 3.48 2.93 2.30

For vertical pipe runs spacing should be increased by 30%.

Cement Usage Recommendations

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

NOMINAL BORE NUMBER OF JOINTS TYPE & SIZE OF BRUSH NUMBER OF PEOPLE
1.4" - 1/2" 300 3/16" Round 1
3/4" - 1" 180 3/8" Round 1
1.1/4" - 2" 100 1" Flat 1
2.1/2" - 3" 50 2" Flat 1
4" 20 2" Flat 2
5" - 6" 10 2" Flat 2
8" 8 2.1/2" Flat 3
10" 3 3" Flat 3
12" 2 3" Flat 3

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

PVC-U Imperial Pipe Dimensions


 
N B PIPE O D (mm) CLASS MAX W P WALL (mm) WEIGHT KG/M
1/4" 13.7 7 12 3.50  
3/8" 17.1 E 15 1.90  
    7 12 3.80  
1/2" 21.3 E 15 2.10 0.16
    7 12 4.00 0.31
3/4" 26.7 E 15 2.50 0.23
    7 12 4.20 0.43
1" 33.4 E 15 2.70 0.32
    7 12 4.80 0.62
1.1/4" 42.2 D 12 2.70 0.46
    E 15 3.20 0.52
    7 12 5.20 0.85
1.1/2" 48.3 D 12 3.00 0.61
    E 15 3.70 0.67
    7 12 5.50 1.04
2" 60.3 C 9 3.00 0.73
    D 12 3.70 0.84
    E 15 4.50 1.00
    7 12 6.00 1.43
2.1/2" 75 C 9 3.60 1.20
    E 15 5.60 1.80
3" 88.9 B 6 3.10 1.00
    C 9 4.10 1.05
    D 12 5.30 1.85
    E 15 6.50 2.13
4" 114.3 B 6 3.60 1.90
    C 9 5.20 2.43
    D 12 6.80 3.12
    E 15 8.30 3.73
5" 140 B 6 4.10 2.70
    C 9 6.70 4.30
    D 12 8.30 4.50
    E 15 10.40 6.60
6" 168.3 B 6 4.80 3.60
    C 9 7.50 4.89
    D 12 9.90 6.97
    E 15 12.10 8.02
8" 219.1 B 6 5.60 5.35
    C 9 8.80 7.70
    D 12 11.60 10.00
    E 15 14.10 12.50
10" 273 B 6 7.00 8.20
    C 9 10.90 12.00
    D 12 14.30 15.80
    E 15 17.50 18.90
12" 323.9 B 6 8.20 11.50
    C 9 12.90 16.60
    D 12 17.00 22.20
    E 15 20.80 26.70
14" 355.6 B 6 9.00 13.60
    C 9 14.10 20.20
    D 12 18.60 26.50
    E 15 22.80 32.00
16" 406.4 B 6 10.20 18.10
    C 9 16.20 26.50
    D 12 21.10 34.60
    E 15 26.00 41.50
18" 457.2 B 6 11.90 21.90
    C 9 18.20 33.30
    D 12 23.80 43.90
20" 508 B 6 13.20 27.10
    C 9 20.20 41.50
24" 609.6 B 6 15.70 38.80
    C 9 24.10 59.90

Key:

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

Fitting Dimension Downloads

Click here to view available fitting dimension downloads.