在我(wo)國的(de)(de)(de)鋼管(guan)制造標準(zhun)中,有(you)(you)(you)結構用(yong)(yong)(yong)鋼管(guan)和流(liu)(liu)體(ti)(ti)輸(shu)送用(yong)(yong)(yong)鋼管(guan)之分。結構用(yong)(yong)(yong)鋼管(guan)主要(yao)(yao)(yao)(yao)(yao)用(yong)(yong)(yong)于一般(ban)金(jin)屬結構如橋、梁(liang)、鋼構架等,它只要(yao)(yao)(yao)(yao)(yao)求(qiu)保證強(qiang)度與(yu)剛度,而對鋼管(guan)的(de)(de)(de)嚴密性不作要(yao)(yao)(yao)(yao)(yao)求(qiu)。流(liu)(liu)體(ti)(ti)輸(shu)送用(yong)(yong)(yong)鋼管(guan):主要(yao)(yao)(yao)(yao)(yao)用(yong)(yong)(yong)于帶有(you)(you)(you)壓力(li)的(de)(de)(de)流(liu)(liu)體(ti)(ti)輸(shu)送,它除了要(yao)(yao)(yao)(yao)(yao)保證有(you)(you)(you)符合相應要(yao)(yao)(yao)(yao)(yao)求(qiu)的(de)(de)(de)強(qiang)度與(yu)剛度外,還要(yao)(yao)(yao)(yao)(yao)求(qiu)保證密閉性,即在出(chu)廠前要(yao)(yao)(yao)(yao)(yao)求(qiu)逐(zhu)根進行(xing)水壓試驗。對壓力(li)管(guan)道來說,它輸(shu)送的(de)(de)(de)介質常(chang)常(chang)是易燃、易爆(bao)、有(you)(you)(you)毒、有(you)(you)(you)溫度、有(you)(you)(you)壓力(li)的(de)(de)(de)介質,故應選(xuan)用(yong)(yong)(yong)流(liu)(liu)體(ti)(ti)輸(shu)送用(yong)(yong)(yong)鋼管(guan)。在實際的(de)(de)(de)工程設計(ji)、采購和施工中,發現有(you)(you)(you)用(yong)(yong)(yong)結構用(yong)(yong)(yong)鋼管(guan)代(dai)替流(liu)(liu)體(ti)(ti)輸(shu)送用(yong)(yong)(yong)鋼管(guan)的(de)(de)(de)現象,這(zhe)是絕對禁止的(de)(de)(de)。



  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(bu)銹鋼無縫管 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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