Hydrogen has been stored as a pressurized gas in high-pressure gas vessels since the beginning of the 20th century. The main reason for pressurizing hydrogen is that when it is pressurized its apparent volume becomes smaller, making storage and transportation more convenient. Hydrogen is a flammable gas and has embrittling property. Hence requires special care from the viewpoint of safety when using pressurized hydrogen. EKC has incorporated all the technical requirements for manufacturing safe storage vessels of pressurized hydrogen storage. Required tests are done in order to qualify steels suitable for use in the manufacture of gas cylinders for hydrogen and hydrogen bearing embrittling gases.