hydrogen gas hydrogen gas in supplier own cylinder , hydrogen gas in supplier own cylinder , compressed hydrogen gas specification: hydrogen percent by volume, minimum = 99.98 oxygen, ppm (maximum) =6 nitrogen, ppm (maximum) =100 moisture content ppm (maximum) =6 dew point = (-65 degree celsius) carbon dioxide, ppm (maximum) = 5 carbon monoxide, ppm (maximum) = 1 mercury, (mg/cubic meter), maximum = nil. hydrocarbons, ppm (maximum) = 1. hydrogen gas cylinder details: - hydrogen gas cylinder- only supplier scope. each cylinder pressure= 140 to 150 (kg/square centimeter) at bhel trichy store-620014. each cylinder volume = 7 cubic meters. cylinder valve threads- internal thread. cylinder shall meet relevant indian standards requirement. rental free period for supplied hydrogen gas cylinders - 120 days total gas cylinder requirement = 257 numbers (individual gas cylinders) and each cylinder volume - 7 cubic meters. if hydrogen gas cylinder volume is more than 7 cubic meters, however only 7 cubic meter per cylinder will be considered for invoice. supply shall accompany the material safety data sheet (msds) along with first lot of supply. test certificate is required along with each supply. delivery schedule: staggered supply of gas in supplier own cylinders as and when required by bhel trichy. each gas cylinder shall have printed format sticker and format have following details. batch number, filling date, gas manufacturer name, hydrogen gas composition details. application- in welding process.