Corrosion resistance and resistance to attack by many industrial chemicals make plastics pipes the obvious choice for chemical plant installations. Like with all materials used in the construction of chemical plants care must be taken in selecting the correct plastics pipes and fittings that will withstand the operating conditions.
The wide range of polymers used in manufacture of plastics pipes and fittings provide a good range of products from which to select the appropriate material. PVC piping systems are widely used in water, waste water and chemical transfer. Polyethylene piping systems are well suited to installation in difficult industrial situations. Their high strength and ease of installation also makes them ideal for compressed air reticulation.
Glebe Island Bridge: Designed by the NSW Roads and Traffic Authority, the structure has a main span of 345m, making it the longest cable-stayed bridge in Australia and second only to the Sydney Harbour Bridge in its overall length of 805m.
Vinidex supplied their PE pipe cable encasing in an unusual project, namely to Sydney’s Glebe Island Bridge (renamed "Anzac Bridge"), an established engineering landmark. The huge construction is supported by 128 “invisible” steel cables hidden inside black polyethylene pipes. Nearly 14km of the outer black polyethylene cable sheath in 180mm, 225mm and 250mm outside diameters and more than 500 custom fittings were fabricated to suit the end conditions of the 128 stay cables. The 12m lengths were joined on the bridge deck by an automatic butt welding machine and winched up into place before the cable strands were inserted. A hand-held extrusion welding gun joined the fittings to the pipe. Polyethylene was chosen for its flexibility and durability. It is not affected by sunlight, will not crack or become brittle and provides excellent resistance to corrosion.
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