NaOH溶液(ye)，濃度(du)小于(yu)29％，設計(ji)壓力1.2MPa，設計(ji)溫度(du)為常溫。NaOH溶液(ye)的材(cai)質選用(yong)(yong)(yong)詳述見(jian)本書第一章。對于(yu)這個工況(kuang)，管(guan)(guan)(guan)道材(cai)料可(ke)以選用(yong)(yong)(yong)20＃鋼；如果是美標材(cai)料，管(guan)(guan)(guan)子(zi)選用(yong)(yong)(yong)ASTM A106-B無縫鋼管(guan)(guan)(guan)，管(guan)(guan)(guan)件(jian)選用(yong)(yong)(yong)ASTM A234-WPB。
