NaOH溶液(ye)，濃(nong)度小于29％，設計壓力1.2MPa，設計溫度為常溫。NaOH溶液(ye)的材(cai)(cai)質(zhi)選(xuan)(xuan)用(yong)(yong)(yong)(yong)詳述見(jian)本(ben)書第一章。對(dui)于這個工況，管道材(cai)(cai)料可以選(xuan)(xuan)用(yong)(yong)(yong)(yong)20＃鋼(gang)；如果(guo)是美標材(cai)(cai)料，管子選(xuan)(xuan)用(yong)(yong)(yong)(yong)ASTM A106-B無縫鋼(gang)管，管件(jian)選(xuan)(xuan)用(yong)(yong)(yong)(yong)ASTM A234-WPB。
