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Tube Titẹ giga (Hydrogen)
Awọn ohun elo opo gigun ti epo yẹ ki o jẹ HR31603 tabi awọn ohun elo miiran ti a ti ni idanwo lati jẹrisi ibaramu hydrogen to dara. Nigbati o ba yan ohun elo irin alagbara austenitic, akoonu nickel yẹ ki o tobi ju 12% ati pe deede nickel ko yẹ ki o kere ju 28.5%.
