某(mou)工程(cheng)管(guan)(guan)(guan)道(dao)(dao)器材(cai)設計人(ren)員(yuan)因不(bu)了(le)解工藝(yi)(yi)原理，僅僅通過管(guan)(guan)(guan)道(dao)(dao)設計溫(wen)度、壓力、流體介質特(te)性參(can)數，選用(yong)(yong)了(le)碳鋼材(cai)質管(guan)(guan)(guan)道(dao)(dao)等(deng)級，實(shi)際運行(xing)(xing)時，裝置(zhi)內(nei)因某(mou)種原因釋放的(de)物料溫(wen)度在-40℃以下，在高(gao)荷載作(zuo)用(yong)(yong)下，管(guan)(guan)(guan)道(dao)(dao)疲(pi)勞造成管(guan)(guan)(guan)子裂紋泄漏(lou)。如果管(guan)(guan)(guan)道(dao)(dao)器材(cai)設計人(ren)員(yuan)了(le)解清楚(chu)工藝(yi)(yi)原理再進(jin)行(xing)(xing)器材(cai)選用(yong)(yong)，就應該知道(dao)(dao)只有選用(yong)(yong)低溫(wen)鋼才能保證管(guan)(guan)(guan)子運行(xing)(xing)的(de)本(ben)質安全(quan)。