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Twinwall Road Drainage System

Condron Concrete Works Twinwall Plastic Pipes are available in 150mm, 225mm, 300mm, 375mm integrated sockets and 450mm diameter straight with coupler and can be supplied with associated fittings. Twinwall HDPE Plastic Pipes have Irish Agrément Board Certification and British Board of Agreìment Certification.

During production there is continuous quality control on all critical parts of the production process to ensure wall thickness, internal diameter, weight, external diameter and that socket diameters are all within dimensional tolerances.

Quality Control
Test Frequency
Appearance (visual inspection) 1/hour
Dimensional accuracy 1/hour
Perforation dimensions and appearance 1/hour
Impact resistance 1/day
Short term stiffness 1/day
In our purpose built lab, continuous assessment is carried out for melt flow index, ring stiffness, ring flexibility, impact resistance, heat resistance, internal pressure tests and jointing tests to the latest International and European Standards. Sealing ring are certified to EN681 and designed to exceed 0.5bar while under deflection and shear.

Advantages of Condron Concrete Works Twinwall Pipes

  •  Low weight 6m pipes with/without socket for safer and faster installation.
  •  High chemical resistance.
  •  High impact resistance which may permit faster backfilling (depending on ground conditions).
  •  Smooth interior, resulting with less blockages and greater flow rates.
  •  It also permits easy cable installation.
  •  Slight curves can be fabricated to adapt to on site requirements.
  •  Joints are guaranteed to a 5m head of water.
  •  Made from recycled materials.
  •  High durability pipeline.
  •  Ring stiffness in excess of 6kn/m2.
  •  Resistance to water jetting.
  •  Can be laid to a depth of up to 10m (depending on ground conditions).
Standard Twinwall Pipes
ID Ø mm OD Ø mm Length (m) Weight kg/m (Approx.) Socketed / Straight
100 116 6 0.70 Straight
150 175 6 1.20 Socketed
225 260 6 2.38 Socketed
300 345 6 4.10 Socketed
375 435 6 6.80 Socketed
450 500 6 8.20 Straight
Perforated Twinwall Pipes Perforated Twinwall Pipes Perforated Twinwall Pipes Perforated Twinwall Pipes Perforated Twinwall Pipes
ID Ø mm OD Ø mm Length (m) Weight kg/m (Approx.) Socketed /Straight
100 116 6 0.70 Straight
150 175 6 1.20 Socketed
225 260 6 2.38 Socketed
300 345 6 4.10 Socketed
375 435 6 6.80 Socketed
450 500 6 8.20 Straight
Pipe Dimensions
Nominal internal pipe diameter d1 (mm) External pipe diameter d2 (mm) t1 optimum (mm) t2 optimum (mm) t3 optimum (mm) Nominal length (m) Nominal weight (kg/m-1 Approx.) Pitch (mm)
100 116±2 0.6 1.2 0.8 6 0.70 13.25
150 175±2 0.8 1.8 1.4 6 1.20 26.61
225 260±2 1.1 1.9 1.4 6 2.38 34.80
300 345±2 1.4 2.5 1.7 6 4.10 41.13
375 435±2 1.9 3.5 2.7 6 6.80 50.27
450 500±2 2.1 3.4 2 6 8.20 56.55
Perforated Pipe Details
Internal pipe Ø (nominal)(mm) No. of slots per dwell No. of dwells per metre Slot length (mm) Slot width (mm) Permeable area min.(mm2/m-1)
100 6 74 10-15 1.2-1.5 5256
150 6 38 10-18 1.2-1.7 2736
225 6 29 10-30 3.0-3.5 5220
300 6 25 15-31 3.0-3.5 6750
375 6 20 20-36 3.0-3.5 7200
450 4 18 35-50 3.0-3.5 7560
Semi-Perforated Pipe Details
Internal pipe Ø (nominal)(mm) No. of slots per dwell No. of dwells per metre Slot length (mm) Slot width (mm) Permeable area min.(mm2/m-1)
100 3 73 10-15 1.2-1.5 2628
150 3 38 10-18 1.2-1.7 1368
225 3 29 10-30 3.0-3.5 2610
300 3 25 15-31 3.0-3.5 3375
375 3 20 20-36 3.0-3.5 3600
450 2 18 35-50 3.0-3.5 3780
Material properties/ Typical values 2EA3F2 2EA3F2
Property Test method reference Typical values
Bulk Density EN ISO 60: 2000 0.58g /cc
Melt Mass Flow Rate (MFR) EN ISO 1133: 2005 Procedure A (2.16 Kg) 0.66g/10 mins
Ash Content EN ISO 3451 Method A 0.14%
Izod Impact EN ISO 180 Type A 14.3 KJ / m²
Tensile Stress @ Yield EN 527-2 Type A1 25.2 MPa
Tensile Strain @ break EN 527-2 Type A1 250%
Oxidation Induction time BS EN 728 ≥ 4 mins
Coupler Fitting Pipe Diameter Offset Pipe Diameter Offset
100mm 150mm 225mm 300mm 375mm 450mm
Straight
Coupler Dimensions
Nominal internal/external pipe diameter (mm) Internal Diameter Nominal length (mm) Nominal seal height (mm)
At first dwell (mm) At second dwell (mm) Nominal length (mm) Nominal seal height (mm)
225/260 272.5 264.0 220.0 23.5
300/345 356.5 346.0 245.0 31.5
375/435 449.5 439.0 330.0 40.6
T - Junctions Fitting Pipe Diameter Offset
150mm 225mm 300mm 375mm 450mm
150mm
225mm
300mm
375mm
450mm
Y - Junctions Fitting Pipe Diameter Offset
150mm 225mm 300mm 375mm 450mm
150mm
225mm
300mm
375mm
450mm
Bends Pipe Offset
11.25º 15º 22.5º 30º 45º 90º
150mm
225mm
300mm
375mm
450mm
Reducer Fitting Pipe Diameter
150mm 225mm 300mm 375mm 450mm
150mm
225mm
300mm
375mm
450mm
PA Saddle Description
A Plastic Adaptor saddle to connect a 160mm OD PVC lateral pipe into a large diameter Twin Wall or Ribbed Sewer pipe DN 300mm – DN 600mm.
Pipe Diameter Saddle Diameter Offset
150mm
300mm
375mm
450mm

Standard Couplings Description
Designed for sewerage, drainage and all non and low pressure applications up to 2.5 bar.
When used individually or combined with bushes, Flexseal Standard Couplings have many applications in the construction, repair and maintenance of pipe systems:

  • As a joint for plain ended pipes
  • Repair and maintenance of existing pipelines
  • Connecting short and cut lengths of pipe
  • Making post construction connections to an existing pipeline
  • Reconnection of laterals on renovated sewers
Pipe Diameter Repair Couplings
Pipe Diameter 150mm 225mm 300mm 375mm 450mm
150mm
225mm
300mm
375mm
450mm
Pipe Lubricant Description – For plastic pipes.
Pipe Lubricant NEUTREX® for plastic pipes: a white, water miscible paste based on synthetic materials. Standard application: general plumbing and construction. Neutrex is approved for drinking water applications after DVGW as well as WRAS.

Condron Concrete Works Twinwall Pipes can be delivered with any order for Roof Tiles, O.G. Pipes, S&S Pipes, Manhole Rings, Manhole Covers and Road Gullies on the same delivery.

Internal Pipe Ø Approx. Number of Structural Twinwall pipes per bale
100mm 81
150mm 36
225mm 14
300mm 8
375mm 5
450mm 4

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Twinwall Road Drainage System
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