Case Study: Bahrain International Airport Repair of Leaking Step Joint on 100mm UPVC Pipe
Flying high – the live leak repair of a 100mm UPVC pipe which kept a system operational at Bahrain International Airport
When a 100mm UPVC pipe which was part of an important system at Bahrain International Airport began leaking from a step joint, a quick-and-easy live leak repair method was required as shutting down the line was not an option.
Case Study Data
Live leak repair
Leaking step joint on a 100mm UPVC plastic pipe
Wrap & Seal Pipe Burst Tape
Self-amalgamating silicone repair tape which sealed up and over the leaking step joint
SylWrap HD Pipe Repair Bandage
Applied over the sealed step joint to reinforce the repair by providing a rock hard, impact resistant layer
SylWrap Pipe Repair Contractor Case
Products were supplied as part of a Contractor Case, capable of making up to six live leak repairs
Case Study PDF
Case Study Details
UPVC is a strong and versatile pipe material which is assembled using a solvent cement to bond pieces together. Sometimes, these bonds can loosen and begin leaking, which is what happened to the 100mm pipe at Bahrain Airport.
The leak in question was through a step joint connecting two sections of pipe together. The pipe could not be shut off for a repair because of the importance of the airport system it supported.
This meant that the normal method Sylmasta recommend to clients for sealing a leaking step – by using a Superfast Epoxy Putty Stick to plug the gaps between the joint and the pipe – would not be effective because the pipe was wet.
The airport therefore had to use Wrap & Seal Pipe Burst Tape as their sealing material. Wrap & Seal is a self-amalgamating silicone repair tape which stretches by 300 percent, fusing to form a solid rubber band over leak areas.
Using Wrap & Seal on a step is not as straightforward as wrapping a straight section of pipe. To create a repair capable of sealing the step between the 100mm UPVC pipe and the sleeve, the maintenance team carrying out the application began wrapping approximately 100mm away from the joint.
After approaching the sleeve by overlapping the Tape by 50 percent, they then built up layers of Wrap & Seal immediately next to the joint. This created a ridge. When this ridge reached near-level height with the step, the application of the Tape continued for a further 50mm across the step joint to fully encompass it.
Two 50mm x 4m Wrap & Seals were required before it was established that water had stopped escaping the joint and the leak was fully sealed. The repair was then completed by applying a SylWrap HD Pipe Repair Bandage over the Tape.
SylWrap HD is a composite repair wrap with a water activated resin which sets rock hard in minutes. The Bandage was wrapped around the pipe and smoothed down using water poured onto the pipe from a bottle. It cured to provide an impact resistant, protective shell.
The entire repair was carried out in less than 30 minutes whilst the pipe remained in operation. The two Wrap & Seal Tapes and SylWrap HD Bandage were supplied to the maintenance team as part of a SYL-PRO-633 Pipe Repair Contractor Case.
A Contractor Case contains enough products to make up to six live leak repairs on pipes of all types and diameters. The Case is easy-to-store on site and transport, ensuring that everything needed to fix a leaking pipe is close to hand and enabling repairs to be made as soon as problems are identified.
Following the success of the 100mm UPVC pipe repair, the maintenance team have since gone onto use Contractor Cases at the Airport to fix 150mm and 200mm pipes suffering from similar problems.
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