Epco Plastics Limited

ABS Pipes, Fittings & Valves Technical Information


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ABS PIPE SYSTEMS

ABS (Acrylonitrile butadiene styrene) is an extremely robust thermoplastic pipework system used by many industries in systems for food and beverage production, sewerage and water treatment etc.

ABS is extremely resistant to impact with good resistance to chemicals, is non-toxic. Conforming to the toxicological requirements of the British Plastic Federation, British Industrial Biological Research Association Code of Practice for Food Usage 45/5, and EEC requiremtns for plastic materials in contact with foodstuffs.  These systems are light, strong and simple to fit using a solvent cement.

ABS Products are clearly identified by their light grey colour.

WRAS Approval

ABS is approved by the Water Research Advisory Scheme for use with potable water.

Standards

ABS pipe is manufactured in accordance with BS5391 Part 1

ABS fittings are manufactured in accordance with BS5392 Part 1

Chemical Resistance

ABS has good resistance to a wide range of diluted inorganic acids, organic acids, salts, animal fats and oils.  ABS is not resistant to organic solvents, alcohol, petrol, acetic acid or vegetable oils. For information on specific chemical resistance for ABS please contact our sales department on 0113 2491155 or email
sales@epco-plastics.com.

ABS System Pressure/Temperature Relationship

Pressure ratings for plastic pipework systems are always quoted at 20C, it is a fundamental principle of such systems that if the temperature is increased then the pressure rating must be reduced. ABS systems should never be used for temperatures in excess of 70C. The following chart gives a rough guide as to the temperature/pressure relationship of ABS pipework systems.

  - 40C 20C 30C 40C 50C 60C 70C
Class B 6.0 BAR 6.0 BAR 5.2 BAR 4.5 BAR 3.6 BAR 2.8 BAR 2.0 BAR
Class C 9.0 BAR 9.0 BAR 7.8 BAR 6.5 BAR 5.5 BAR 4.2 BAR 2.8 BAR
Class D 12.0 BAR 12.0 BAR 10.5 BAR 8.9 BAR 7.2 BAR 5.5 BAR 3.6 BAR
Class E 15.0 BAR 15.0 BAR 13.0 BAR 11.0 BAR 9.0 BAR 7.0 BAR 4.8 BAR


ABS 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 ABS 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 20C 50C 60C
  SPACING GIVEN IN METRES
3/8" 0.8 0.5 0.4
1/2" 0.9 0.6 0.5
3/4" 1.0 0.7 0.6
1" 1.1 0.8 0.7
1.1/4" 1.2 0.9 0.7
1.1/2" 1.3 1.0 0.7
2" 1.4 1.1 0.8
2.1/2" 1.5 1.2 0.8
3" 1.6 1.2 0.9
4" 1.8 1.3 1.0
5" 2.0 1.5 1.1
6" 2.1 1.6 1.2
8" 2.3 1.8 1.5

The following correction factors should be applied for other pressure ratings:

PRESSURE RATING PN 4.5 PN 6 PN 9 PN 12.0
CORRECTION FACTORS 0.63 0.71 0.88 0.92

Pipes operating at higher temperatures up to 70C must be continuously supported.

For vertical pipe runs spacing should be increased by 50%.

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 
3/8" - 1/2" 400 4mm Round 1
3/4" - 1" 400 8mm Round 1
1.1/4" - 2" 200 1" Flat 1
2.1/2" - 3" 60 2" Flat 1
4" 35 2" Flat 2
5" - 6" 20 3" Flat 2
8" 10 3" Flat 3

ABS Imperial Pipe Dimensions

N B PIPE O D (mm) CLASS MAX W P WALL (mm) WEIGHT KG/M
3/8" 17.1 E 15 1.70 0.09
1/2" 21.4 E 15 2.00 0.13
    T   3.60 0.22
3/4" 26.7 E 15 2.50 0.20
    T   3.60 0.28
1" 33.6 C 9 2.00 0.21
    E 15 3.10 0.31
    T   4.30 0.43
1.1/4" 42.2 C 9 2.50 0.32
    E 15 3.90 0.49
    T   5.30 0.65
1.1/2" 48.3 C 9 2.80 0.42
    E 15 4.50 0.64
    T   6.00 0.85
2" 60.3 C 9 3.60 0.67
    E 15 5.60 1.00
    T   7.20 1.28
2.1/2" 75.2 C 9 5.00 1.14
3" 88.9 C 9 5.20 1.40
    E 15 8.30 2.16
4" 114.3 C 9 6.60 2.32
    E 15 10.60 3.59
5" 140.2 C 9 9.30 3.97
6" 168.3 C 9 9.90 5.12
    D 12 12.80 6.50
8" 219.1 C 9 12.70 8.57

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