NPO Centrotech LLC (Russia, Sverdlovsk region) announced that it have developed, manufactured and successfully tested prototypes of metal composite cylinders of various volumes for storage and transportation of hydrogen with an operating pressure of 700 atmospheres (68.9 megapascal).
The list of ultra-high-pressure metal-composite cylinders includes a prototype cylinder for hydrogen storage and transportation with a volume of 50 litres. The specially developed leiner (inner sealing layer of the cylinder) is made of aluminium alloy, and the reinforcing winding of the cylinder is made with the use of carbon fibre.According to the test results, the prototype of the 50 litre metal-composite cylinder confirmed compliance with all the high requirements for a cylinder with an operating pressure of 700 atm. During the tests, the prototype demonstrated the required safety margin (withstood ultimate loads with a safety margin factor of 2.4) and confirmed resistance to cyclic stresses.
