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Link-Seal was chosen to seal the seawater, rainwater and sewage pipe penetrations at Barangaroo. Unlike grouts, sealants or epoxies, Link-Seal is a mechanical solution that creates an instant seal which does not shrink or require ongoing maintenance. This article examines how Link-Seal solved the challenges at Barangaroo.

The Link-Seal pipe penetration sealing system has been used extensively in Sydney’s largest redevelopment project: Barangaroo.

The development of the Barangaroo precinct in Sydney is to provide a public, residential, retail and commercial area, which is divided into three sections: Barangaroo South, Central Barangaroo and Barangaroo Reserve. 

Link-Seal mechanical seals were specified and installed to instantly and efficiently seal the annular space around critical pipe penetrations passing through walls, floors and ceilings. Link-Seals have been utilised across Barangaroo for the seawater system, numerous rainwater tanks and sewage waste system. 

Unlike grouts, sealants or epoxies, Link-Seal creates an instant seal which does not shrink or require ongoing maintenance. Link-Seals are available in different compounds and sizes to best suit every application and can be used around most types of pipes and withstand a wide range of chemicals.

Sewage waste pipe penetrations in Barangaroo basements

The sewer mining and sewer outfall penetrations located in the basements of Barangaroo have been sealed with the Link-Seal model “O”, designed for PVC and HDPE pipes. This type of Link-Seal is suitable for highly corrosive environments and is resistant to oils, fuel and many solvents such as methane, hydraulic fluid, etc.

In other cases where fragile pipes have been installed, the low durometer (Model L) is specifically designed to create a seal without distorting the pipe.

Case Study – How to seal sewage pipe penetrations in Sydney’s Barangaroo development

Seawater pipe penetrations – Barangaroo, Hickson Road 

Where exposed to seawater, the stainless steel nuts, bolts and washers were replaced with “SAF 2507” Super Duplex nuts, bolts and washers. This has enabled the Link-Seal to be immersed in seawater and exposed to UV in regular cycles. 

With the tidal water movements affecting this area of the Barangaroo development, it was crucial to ensure that the compound and the longevity of the seawater seal would survive this harsh environment.

Case Study – How to seal a seawater pipe penetration?

Rainwater tank pipe penetrations in Barangaroo Towers

The southern part of the Barangaroo project hosts three iconic high-rise towers called International Towers Sydney and comprises residential apartments, retail shops, office buildings, restaurants, hotel and cultural facilities.

The rainwater tanks located on multiple levels of the towers have copper pipes passing through walls and the Link-Seal Model “S” with stainless steel fittings were installed in combination with the Century-Line Sleeves to achieve the ultimate pipe penetration seal for a lifetime of leak-proof performance. 

Century-Line Sleeves are the quickest, easiest and most efficient way of creating the perfect circular holes in poured concrete barriers. In this portion of the Barangaroo project, approximately 30 sleeves were installed onto the formwork. 

Link-Seal advantages at a glance:

  • Specially formulated to resist aging, attack from ozone, sunlight, water and most chemicals
  • Positive hydrostatic seal – rated to 5 Bar – 500KpA
  • Long-term pipe penetration seal
  • Can be adjusted and reinstalled an unlimited number of times
  • Simple installation – only one contractor and hand tools required
  • Allowance for pipe movement
  • Instant seal achieved – no curing time required
  • Link-Seal installations take 75 per cent less time when compared to lead-oakum joints, hand fitted flashings, mastics or casing boots

The Link-Seal pipe penetration sealing system is truly the best solution when it comes to sealing pipe penetrations for long periods of time. 

The durability and efficiency of the product has been proven in many installations over the years. As an example, Link-Seal “O” models have been used at the Altona Oil Refinery in Victoria and have provided a permanent seal into the bund. 

These pipe seals have been in place for over 30 years without any leaks or complications. The Link-Seals have been removed and reinstated several times during their life for pipe inspection and maintenance; the removal and reinstallation is possible as they are a mechanical seal.  

No allowance needs to be made for downtime on curing, which produces significant savings in time and capital. 

The Barangaroo project commenced in 2012 and is expected to be completed by 2023. 

The Link-Seal system is a far superior pipe penetration seal solution and that is why it has been chosen for the Barangaroo development.

This partner content is brought to you by Projex Group. For more information, visit projex.com.au.

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