Perforated Twinwall CorriPipe™

Our twinwall drainage pipe is made from HDPE polyethylene. It is manufactured by a twin extrusion process in which the two layers are simultaneously extruded one inside the other and heat welded together in one continuous step.

The outer wall is corrugated providing excellent structural strength which reduces the possibility of on-site damage. The inner wall has a smooth seamless finish to assist hydraulic flow. The design unlike traditional single-wall pipe prevents silt accumulation. Available in black as standard.

Independent studies have shown that a velocity of 0.5 metres per second is needed to ensure drainage pipe will clear itself of silt. JFC 110mm (4″) Twinwall pipe far exceeds this guideline with a maximum flow rate of 0.75 metres per second.

It is supplied either fully perforated or half perforated depending on application required. The small perforations in the pipe enable water to be collected and carried to away to a soakaway, water course or surface/rainwater drainage system.

Additional Info:

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Applications:

Ideal for land drainage and flood risk management applications.

Sizes:

Product Code	Description	Internal Diameter (mm)	Outer Diameter (mm)	Lengths/ pack
110TP	110mm Fully Perforated CorriPipe™	94.5	111.5	100
150TP	150mm Fully Perforated CorriPipe™	150	178	33
150TPH	150mm Half Perforated CorriPipe™	150	178	33
225TP	225mm Fully Perforated CorriPipe™	225	265	14
225TPH	225mm Half Perforated CorriPipe™	225	265	14
300TP	300mm Fully Perforated CorriPipe™	300	354	8
300TPH	300mm Half Perforated CorriPipe™	300	354	8
375TP	375mm Fully Perforated CorriPipe™	372	426	5
375TPH	375mm Half Perforated CorriPipe™	372	426	5
450TP	450mm Fully Perforated CorriPipe™	445	512	4
450TPH	450mm Half Perforated CorriPipe™	445	512	4
600TP	600mm Fully Perforated CorriPipe™	592	680	1
600TPH	600mm Half Perforated CorriPipe™	592	680	1

Benefits:

Flow rates of up to 0.75 metres/second (Gradient of 1: 100)
Compression strength of 750 N
Up to 50% more efficient than single wall coil
Smooth internal plastic bore with reduced hydraulic resistance. Manning’s coefficient of 0.012 allows greater flow capacity and also a greater factor of safety. This also reduces sediment or debris build-up when compared to concrete or steel.
Lightweight when compared to traditional materials such as concrete or steel E.G (Up to 90% lighter than concrete).
Fully leak tested to HAPAS requirements when used with rubber seals.
Standard 6m lengths make it quick and easy to install, eliminating wastage and reduces labour and plant costs. (Up to 6 times faster installation compared to concrete).
Parallel corrugations allow pipe to be easily cut square on site as required. (Spiral wound pipe makes it very difficult to create a square cut on site if required).
JFC CorriPipe™ is available unperforated, fully perforated or half perforated.
Manufactured from exceptionally durable HDPE material with excellent corrosion resistance and long term performance.
Resistant to most naturally occuring chemicals and is therefore suitable for use on the majority of soil conditions.
Can typically be installed with cover depths from 0.6 to 10m*
Full range of fittings and accessories available

*Contact JFC for guidance on minimum and maximum burial depths.

*Calculations are based on Manning’s equation for calculating gravity flow in open channels.

Quality Assurance:

JFC CorriPipe™ is fully BBA (British Board of Agrément) approved to ensure reliability and long lasting service. It is supported with comprehensive technical support and a network of stockists.

The following Agrément Certificates have been awarded to JFC CorriPipe™ Twinwall Pipe