Sunday, June 16, 2024

Aiding Pipeline Installations Across Australasia

Kwik-ZIP offers large range of spacers which caters for a wide range of carrier/ casing pipe size combinations

Kwik-ZIP offers large range of spacers which caters for a wide range of carrier/ casing pipe size combinations as well as providing flexibility to deal with project alterations.

“Kwik-ZIP spacers are simple and quick to install and assisted with the sliplining process.” said Mick Hemer, Operations Manager for Jelmac DD.

The HDX’s unique load sharing design maximises the load bearing capacity of each runner and reduces point loading. The simple and efficient installation process does not require any special tools.

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Kwik-ZIP spacers have no metal parts and are made from Kwik-ZIP’s engineered thermoplastic blend that is flexible, extremely tough and has a low co-efficient of friction.


Kwik-ZIP spacers have been used widely across the Australasian region and beyond. For example on a project for the Holden Reservoir Inlet Pipeline – Melton Hwy Crossing for Western Water Melbourne, the work involved inserting a DN800 MSCL Water Main into a DN1050 Steel Casing. The Kwik-ZIP spacer model used was the HDX-90 (90 mm high).

Kwik-ZIP HDX-90 spacers were installed to facilitate the sliplining of an 813 mm diameter cement lined steel water main into a steel encasing pipe by Pezzimenti Trenchless.

“Pezzimenti Trenchless has been using Kwik-Zip spacers for sliplining installations for many years. Whether the carrier pipe is plastic, GRP or heavy weight steel Kwik-Zip has a spacer to do the job. Their technical support and excellent customer service make using Kwik-Zip spacers an easy decision.” said Joe Pezzimenti, Managing Director of Pezzimenti Trenchless Pty Ltd.

Another site for where the spacers were used was with HEB Construction on the Te Maunga Landward Section Outfall project in the Bay of Plenty, New Zealand. Completed in October 2021, the project required the installation of a DN1200 PE water pipeline into a 1,500 mm diameter concrete duct over a length of 100 m. In this instance the Kwik-ZIP HDXT 103 spacer was utilised.

The Kwik-ZIP spacers were installed around the circumference of a 1,200 mm diameter PE pipeline to ensure the newly installed PE pipeline would sit central while pulling the pipeline through a 100 m, 1,500 mm existing concrete duct under the TEL. By using the Kwik-ZIP spacers, HEB Construction avoided any potential damage to the PE pipe on installation.

HEB Construction successfully used the Kwik-ZIP on the Waiari Pripeline Project and due to the easy and quick installation with the screw lock system it was the preferred option. This was key part of the project and the company needed the certainty during installation.

At either end of the jacking pipe, HEB Construction installed two sets of Kwik-ZIP pipe spacers. The spacers were then installed at 1 m intervals between each end.

On site personnel had previous experience of using the Kwik-ZIP’s and followed the installation guide, which ensured the product was used correctly and efficiently. HEB also had technical support from the supplier and the product worked exactly as it should and no issues were encountered. They were very quick and easy to install and HEB Construction said they would not hesitate in using them again should the situation arise.

One other site where the spacers were used was on the Rail infrastructure Alliance Water Main Project, Sunbury, Victoria, Australia. Here the carrier pipe was a 355 mm diameter HDPE Water Main which was to go inside a PN8 630 mm diameter casing (570 mm i.d.) over a length of some 66 m. Again in this instance the HDX-90 (90 mm high) spacer was utilised.

On the project, horizontal and directional drilling specialist contractor Jelmac Directional Drilling utilised Kwik-ZIP HDX-90 spacers to assist facilitating the sliplining of the 355 mm diameter HDPE carrier pipe. The Kwik-ZIP spacers were specified at 1.5 m intervals for this project as per Melbourne Water Retailer Agencies (‘MRWA’) standards. As the pipes were not being grouted after installation the spacers also needed to support the weight of the pipe and water for the life of the installation. The works were successfully completed at night due to stakeholder requirements.

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Trenchless Works bringing you balanced journalism, accuracy, news and features for all involved in the business of trenchless and no-dig from around the world

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