鍍(du)(du)(du)(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)(guan)分為冷(leng)鍍(du)(du)(du)(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)(guan)、熱(re)鍍(du)(du)(du)(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)(guan)，冷(leng)鍍(du)(du)(du)(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)(guan)已(yi)被禁用(yong)，后者還被國(guo)(guo)家提倡暫時能(neng)使(shi)用(yong)。六七十年代，國(guo)(guo)際上發達國(guo)(guo)家開(kai)始開(kai)發新型管(guan)(guan)(guan)(guan)(guan)材(cai)，并陸續(xu)禁用(yong)鍍(du)(du)(du)(du)鋅(xin)管(guan)(guan)(guan)(guan)(guan)。中國(guo)(guo)建設部等四部委(wei)也發文(wen)明確(que)從2000年起禁用(yong)鍍(du)(du)(du)(du)鋅(xin)管(guan)(guan)(guan)(guan)(guan)作(zuo)為供(gong)水(shui)管(guan)(guan)(guan)(guan)(guan)，新建小區的(de)冷(leng)水(shui)管(guan)(guan)(guan)(guan)(guan)已(yi)經很少使(shi)用(yong)鍍(du)(du)(du)(du)鋅(xin)管(guan)(guan)(guan)(guan)(guan)了(le)，有(you)些小區的(de)熱(re)水(shui)管(guan)(guan)(guan)(guan)(guan)使(shi)用(yong)的(de)是鍍(du)(du)(du)(du)鋅(xin)管(guan)(guan)(guan)(guan)(guan)。熱(re)鍍(du)(du)(du)(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)(guan)在消防、電力和高速公路上有(you)廣(guang)泛的(de)應用(yong)。 |
