在我國的鋼(gang)(gang)(gang)管(guan)(guan)制造標(biao)準(zhun)中,有(you)(you)(you)結構用鋼(gang)(gang)(gang)管(guan)(guan)和流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)用鋼(gang)(gang)(gang)管(guan)(guan)之分。結構用鋼(gang)(gang)(gang)管(guan)(guan)主要(yao)(yao)用于(yu)一般金(jin)屬結構如橋、梁、鋼(gang)(gang)(gang)構架等,它只要(yao)(yao)求保證強(qiang)度與剛度,而對(dui)鋼(gang)(gang)(gang)管(guan)(guan)的嚴密性不作要(yao)(yao)求。流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)用鋼(gang)(gang)(gang)管(guan)(guan):主要(yao)(yao)用于(yu)帶有(you)(you)(you)壓力的流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song),它除了(le)要(yao)(yao)保證有(you)(you)(you)符合(he)相應要(yao)(yao)求的強(qiang)度與剛度外(wai),還要(yao)(yao)求保證密閉性,即(ji)在出廠前要(yao)(yao)求逐根進(jin)行(xing)水壓試驗。對(dui)壓力管(guan)(guan)道(dao)來說,它輸(shu)(shu)送(song)(song)的介質常(chang)常(chang)是易燃、易爆、有(you)(you)(you)毒、有(you)(you)(you)溫(wen)度、有(you)(you)(you)壓力的介質,故應選用流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)用鋼(gang)(gang)(gang)管(guan)(guan)。在實(shi)際的工程設計、采購(gou)和施工中,發現有(you)(you)(you)用結構用鋼(gang)(gang)(gang)管(guan)(guan)代替流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)用鋼(gang)(gang)(gang)管(guan)(guan)的現象(xiang),這是絕對(dui)禁止的。



  結構用無縫鋼管GB/T 8162主要用于一般結構和機械結構。其代表材質(牌號):碳素鋼20、45號鋼;合金鋼Q345、20Cr、40Cr、20CrMo、30-35CrMo、42CrMo等。結構用不銹鋼無縫(feng)管(guan) GB/T 14975-2012 是遍及用于化工、石油、輕紡、醫療、食品、機械等工業的耐侵蝕管道和結構件及零件的不銹鋼制成的熱軋(擠、擴)和冷拔(軋)無縫管。



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