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BIG-DREN is a flexible, double-wall, corrugated HDPE pipe manufactured with the continuous co-extrusion of both walls, with slots arranged at 60° intervals around the circumference. Slotted (perforated) piping represents the most effective and economical solution to the growing problems of hydrogeological instability, waterlogging of farm land and sports grounds, foundation drainage on construction sites, fluid capture (e.g. in landfills) and water dispersion. Slotted piping eliminates the need to construct and maintain large drainage basins. Light weight and versatility also make slotted piping ideal for use in emergency and safety work.

TECHNICAL SPECIFICATIONS

ISO 9001/2008

  • The pipe is black outside and inside.
  • Supplied in 6 meter lengths or coils, complete with couplings.
  • The manufacturer’s Quality Management System is certified to UNI EN ISO 9001:2008
  • Standard production conforms to BIG-DREN technical specifications.

GENERAL FEATURES

DESIGN:
Double-wall pipe, black outside and inside.
APPLICATION:
Refer to section below.
CRUSH RESISTANCE:
8 KN/m² with 5% deformation of the internal diameter (measured according to SANS 21138-3).
PRESENTATION:
6 meter lengths.
ACCESSORIES:
Couplings.
INSTALLATION:
Underground.

APPLICATION

Corrugated HDPE pipes for subsoil drainage.
Slotted (perforated) piping represents the most effective and economical solution to the increasing problems of:

  • Hydrogeological instability.
  • Waterlogging of farm land and sports grounds.
  • Foundation drainage on construction sites.
  • Fluid capture (e.g. in landfills).
  • Water dispersion.
  • Slotted piping eliminates the need to construct and maintain large drainage basins.
  • Its light weight and versatility makes it ideal for use in emergency and safety work.

ADVANTAGES OF CORRUGATED HDPE PIPING FOR DRAINAGE

  • Lightweight and easy to handle.
  • Easy to lay.
  • Durable, versatile and safe.
  • Low cost.
  • Ideal for use in areas of serious hydrogeological instability.

DISPERSION PIPING FOR FLOW CONTROL

Existing sewer and drainage systems are encountering growing difficulties in coping with the collection and dispersion of rainwater run-off.
This problem is particularly serious in towns and cities. The rapid expansion of built-up areas has dramatically altered the ratio between rainfall volume and drain capacity, partly as a result of higher flow rates entering the drains, but often as a result of the inadequacy of drainage systems originally designed and built to cater for urban expansion on a far smaller scale.

BIG-DREN slotted (perforated) dispersion pipes:

  • Reduce the flow of run-off into existing sewers and drains, when over-saturation is a problem.
  • Ensures gradual and uniform dispersion of rainwater into the soil, and discharges into existing sewers and drains only the water that the soil cannot absorb.
  • Avoids the need to lay larger drainage systems (with higher laying and maintenance costs) while also preventing the build-up of large volumes of water that could exceed the capacity of the main urban drainage network.

PIPING FOR SOIL DRAINAGE

In high rainfall areas, degradation (i.e. loss of the soil’s natural physical, mechanical, chemical and biological properties) can lead to soil becoming unable to absorb rain water, with the risk of hydrogeological instability. One of the ways to prevent the phenomena that eventually leads to subsidence and landslides, is to limit the amount of excess water in the soil.

  • Absorbs the water that the surrounding soil is no longer able to hold, and carries it away to designated receiver points.
  • Drainage is facilitated by the water-proof nature of HDPE and by the low roughness of the internal surface.
  • The smooth bottom of the piping (if not slotted) prevents the formation of deposits and speeds up the flow of water.

TYPE TESTING (PHYSICAL TESTS)

MELT FLOW RATE:
According to ISO 1133: Condition 1T (test parameter: 190°C / 5 Kg / 10 mins) on raw materials of both walls.
DENSITY:
According to ISO 1183: (test temperature: 23°C) on the pipe and on raw materials of both walls.

CONFORMITY TESTS

VISUAL INSPECTION:
According to UNI ISO 4582 sections 3-4. The product is marked with a clearly visible product code printed longitudinally every 3 meters along the pipe.
DIMENSIONS:
Mean external diameter (de), minimum internal diameter (dim).
CRUSH RESISTANCE:
According to Sans 21138-3.
OPERATING LIMITS:
-50°C to +60°C.

DIMENSIONS

Exterior diameter (mm)
75
110
160
230
291
417
Interior diameter (mm)
60
92
137
200
250
350
Infiltration area (mm²/m)
5400 (240°)
6500 (360°)
6500 (240°)
8000 (360°)
9000 (240°)
11000 (360°)
17000
(360°)
24000
(360°)
28000
(360°)
Nominal slot width (mm)
1.3
1.8
1.8
2
2
2
Number of slots per corrugation
2-3*
2-3*
5-6*
8
8
8
Length supplied (m)
6
6
6
6
6
6
Coil supplied (m)
50
50
50
 -
 -
 -
Ring stiffness SN
>450 N
>450 N
>450 N
8kn/m²
8kn/m²
8kn/m²
*minimum slots value it is referred to BigDren with 240° slotting, while higher value is referred to 360° slotting.
Slots can also be configured to customer specifications.

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