Hynds Pipe Systems Limited

Hynds Pipe Systems Limited

- Spun Rubber Ring Joint Pipes

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Hynds HYSPEC Spun Rubber Ring Joint (RRJ) Pipe can perform in a wide range of New Zealand conditions, from marine installations with constant wetting and drying, to high loading installations underneath highways and deep embankments. Designed to AS/NZS 4058 and available in all class strengths, Available in sizes DN225-1800mm diameters.

The Hyspec Spun Rubber Ring Joint (RRJ) pipe system is one of the most versatile pipeline systems available.

Hyspec Spun pipes can perform in a wide range of New Zealand conditions, from marine installations with constant wetting and drying, to high loading installations underneath highways and deep embankments. Hyspec Spun RRJ is available in three main strength classes, with Class 2 being the standard load strength and subsequent classes offering increased strength.

  • Class 2 (X) - Yellow marking
  • Class 3 (Y) - Blue marking
  • Class [i (Z) - Red marking

Higher class strengths are available for very high load situations. Strength design assistance is available from the Hynds Concrete Technical Services Department.

Hyspec Spun RRJ Pipes are designed to offer a hydraulic seal throughout the pipeline up to an internal pressure of 60kPa {6 metre head). The Hyspec joint is designed to allow this seal while still offering the benefits of a flexible joint.

For pressures above this value. Hyspec spun pressure pipes may be specially manufactured.

Hyspec Spun RRJ pipes are manufactured in convenient lengths to allow efficient delivery and off-loading on site.

Hyspec Spun RRJ pipes have elliptical reinforcing cages for pipes of 600mm diameter and larger. These pipes are marked with the word 'TOP' adjacent to lift anchors.

Lifting anchors are installed in Hyspec Spun RRJ pipes with diameters of 600 mm or greater.

Appropriate lifting equipment and methods must be used to ensure that individual anchors are not overloaded.

Small variations occur within the internal diameter of spun concrete pipe. To reduce the effects of any variations, we recommend that the laser level be placed in the collar, rather than the pipe barrel.

Joint gaps between the pipes ensure that the pipes are able to deflect without damage. Nominal joint gaps are detailed in Table 1.

Where the pipe is to be deflected, it is essential that the joint gap is reduced to a minimum before the pipe is deflected within the recommended limits.

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