鍍(du)(du)鋅(xin)(xin)鋼管(guan)(guan)分為冷鍍(du)(du)鋅(xin)(xin)鋼管(guan)(guan)、熱鍍(du)(du)鋅(xin)(xin)鋼管(guan)(guan)，冷鍍(du)(du)鋅(xin)(xin)鋼管(guan)(guan)已被禁用(yong)(yong)(yong)，后者還(huan)被國(guo)(guo)家提倡暫時能使(shi)用(yong)(yong)(yong)。六七十年代，國(guo)(guo)際上發(fa)達國(guo)(guo)家開(kai)始開(kai)發(fa)新型管(guan)(guan)材，并陸續禁用(yong)(yong)(yong)鍍(du)(du)鋅(xin)(xin)管(guan)(guan)。中(zhong)國(guo)(guo)建設部(bu)等(deng)四部(bu)委也發(fa)文明確從(cong)2000年起禁用(yong)(yong)(yong)鍍(du)(du)鋅(xin)(xin)管(guan)(guan)作為供水(shui)管(guan)(guan)，新建小(xiao)區(qu)的(de)冷水(shui)管(guan)(guan)已經很少使(shi)用(yong)(yong)(yong)鍍(du)(du)鋅(xin)(xin)管(guan)(guan)了，有些小(xiao)區(qu)的(de)熱水(shui)管(guan)(guan)使(shi)用(yong)(yong)(yong)的(de)是鍍(du)(du)鋅(xin)(xin)管(guan)(guan)。熱鍍(du)(du)鋅(xin)(xin)鋼管(guan)(guan)在消防、電力和高速(su)公路上有廣泛的(de)應用(yong)(yong)(yong)。 |
