Southern Sun chiller pipes repaired without hassle

Southern Sun chiller pipes repaired without hassle

Nu Flow was called in to repair two 210mm steel chiller pipes which were leaking into a Durban hotel. 

Photos credit: Nu Flow

nuflow 001Two 210mm steel chiller pipes which were leaking into the Southern
Sun Elangeni and Maharani hotel recently and had to be fixed…

The problem

nuflow 002Turning this… into this – a “Nu pipe”!

During peak season at the Southern Sun Elangeni and Maharani hotel two pipes were causing concern. One pipe carries water from a pump room in the basement to the top of the 120m high building and the second pipe carries water back down to the pump room passing through the floor slabs on all 36 floors of the building.

The chiller pipes were leaking in a few places and were decommissioned. The hotel needed the chiller pipes repaired urgently with as little disruption as possible, especially as this was over the December holiday period where the hotel operates at maximum capacity.

A few methods of pipe repair were considered, but Nu Flow was chosen because their solution was the least disruptive.

The solution

nuflow 005Liner wet out and ready to be installed in the pipe.

The two chiller pipes were lined from top to bottom using Nu Flow’s structural lining technology to create a new pipe within the host pipe.

The pipe was disconnected at the top and bottom of the building.

The pipes were then descaled and cleaned using a pneumatic driven cleaning head and Renssi pipe cleaning chains with tungsten carbide tips, which aggressively descale steel pipes.

Epoxy impregnated liners were then lowered down the pipes from the top of the building into the correct position. Within the liners is an inflatable bladder. When the liners were in position, the bladder was inflated and left inflated until the epoxy was cured. The bladder was then removed leaving behind a ‘Nu pipe’ within the original corroded host pipe.

No chopping open! No damage! No mess!

nuflow 004Technicians pouring Nu Flow’s 100% solids epoxy resin into a liner.

The hotel continued its day-to-day operations during December peak season without guests even aware that more than 200m of pipe within the building was being repaired.


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