NaOH溶液，濃度(du)小于29％，設計(ji)壓力1.2MPa，設計(ji)溫(wen)(wen)度(du)為常溫(wen)(wen)。NaOH溶液的材質(zhi)選(xuan)(xuan)用(yong)(yong)詳述見本書(shu)第(di)一章(zhang)。對于這個工況(kuang)，管(guan)(guan)道材料可以選(xuan)(xuan)用(yong)(yong)20＃鋼；如果是(shi)美標(biao)材料，管(guan)(guan)子(zi)選(xuan)(xuan)用(yong)(yong)ASTM A106-B無縫(feng)鋼管(guan)(guan)，管(guan)(guan)件選(xuan)(xuan)用(yong)(yong)ASTM A234-WPB。
