Jul 24, 2020
India has a bunch of gas companies that extract and purify oxygen from the air at 500 factories spread across the country. Oxygen for medical use typically accounts for some 15% of overall supplies. The rest - industrial oxygen - is mainly supplied to steel and automobile industries for running blast furnaces and welding. These companies ship oxygen in liquid form to hospitals with tankers, which are then piped directly to beds. Oxygen is also supplied through steel and aluminium cylinders. Portable machines called concentrators can also filter oxygen from the air. All of these are being used to treat Covid-19 patients now.
Soutik Biswas, ‘The struggle to keep India's Covid-19 patients breathing’, BBC
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