<P> Slurry pipelines are sometimes used to transport coal or ore from mines . The material to be transported is closely mixed with water before being introduced to the pipeline; at the far end, the material must be dried . One example is a 525 - kilometre (326 mi) slurry pipeline which is planned to transport iron ore from the Minas - Rio mine (producing 26.5 million tonnes per year) to the Port of Açu in Brazil . An existing example is the 85 - kilometre (53 mi) Savage River Slurry pipeline in Tasmania, Australia, possibly the world's first when it was built in 1967 . It includes a 366 - metre (1,201 ft) bridge span at 167 metres (548 ft) above the Savage River . </P> <P> Hydrogen pipeline transport is a transportation of hydrogen through a pipe as part of the hydrogen infrastructure . Hydrogen pipeline transport is used to connect the point of hydrogen production or delivery of hydrogen with the point of demand, with transport costs similar to CNG, the technology is proven . Most hydrogen is produced at the place of demand with every 50 to 100 miles (160 km) an industrial production facility . The 1938 Rhine - Ruhr 240 - kilometre (150 mi) hydrogen pipeline is still in operation . As of 2004, there are 900 miles (1,400 km) of low pressure hydrogen pipelines in the US and 930 miles (1,500 km) in Europe . </P> <P> Two millennia ago, the ancient Romans made use of large aqueducts to transport water from higher elevations by building the aqueducts in graduated segments that allowed gravity to push the water along until it reached its destination . Hundreds of these were built throughout Europe and elsewhere, and along with flour mills were considered the lifeline of the Roman Empire . The ancient Chinese also made use of channels and pipe systems for public works . The famous Han Dynasty court eunuch Zhang Rang (d . 189 AD) once ordered the engineer Bi Lan to construct a series of square - pallet chain pumps outside the capital city of Luoyang . These chain pumps serviced the imperial palaces and living quarters of the capital city as the water lifted by the chain pumps was brought in by a stoneware pipe system . </P> <P> Pipelines are useful for transporting water for drinking or irrigation over long distances when it needs to move over hills, or where canals or channels are poor choices due to considerations of evaporation, pollution, or environmental impact . </P>

Provide an example of pipe transport in india