NaOH溶液(ye),濃度小于29%,設計壓力1.2MPa,設計溫度為(wei)常溫。NaOH溶液(ye)的材(cai)質(zhi)選(xuan)用(yong)詳述見(jian)本書第(di)一章。對于這個工(gong)況,管(guan)道材(cai)料可(ke)以選(xuan)用(yong)20#鋼(gang);如果(guo)是美標材(cai)料,管(guan)子選(xuan)用(yong)ASTM A106-B無(wu)縫(feng)鋼(gang)管(guan),管(guan)件選(xuan)用(yong)ASTM A234-WPB。