在(zai)我國的(de)鋼(gang)(gang)管(guan)(guan)(guan)制造標準中(zhong)，有結構(gou)(gou)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)和(he)流(liu)(liu)體輸(shu)送(song)(song)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)之分。結構(gou)(gou)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)主(zhu)要(yao)(yao)用(yong)(yong)于一(yi)般(ban)金(jin)屬結構(gou)(gou)如橋、梁、鋼(gang)(gang)構(gou)(gou)架等，它(ta)只要(yao)(yao)求(qiu)(qiu)保(bao)(bao)證強度(du)與剛度(du)，而對(dui)鋼(gang)(gang)管(guan)(guan)(guan)的(de)嚴密性不作要(yao)(yao)求(qiu)(qiu)。流(liu)(liu)體輸(shu)送(song)(song)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)：主(zhu)要(yao)(yao)用(yong)(yong)于帶有壓(ya)力(li)的(de)流(liu)(liu)體輸(shu)送(song)(song)，它(ta)除了(le)要(yao)(yao)保(bao)(bao)證有符合相應要(yao)(yao)求(qiu)(qiu)的(de)強度(du)與剛度(du)外，還要(yao)(yao)求(qiu)(qiu)保(bao)(bao)證密閉性，即在(zai)出廠(chang)前要(yao)(yao)求(qiu)(qiu)逐根進行水(shui)壓(ya)試驗。對(dui)壓(ya)力(li)管(guan)(guan)(guan)道來說，它(ta)輸(shu)送(song)(song)的(de)介質常(chang)常(chang)是易(yi)燃(ran)、易(yi)爆、有毒、有溫(wen)度(du)、有壓(ya)力(li)的(de)介質，故應選用(yong)(yong)流(liu)(liu)體輸(shu)送(song)(song)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)。在(zai)實際的(de)工(gong)程設計、采購和(he)施(shi)工(gong)中(zhong)，發現有用(yong)(yong)結構(gou)(gou)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)代替流(liu)(liu)體輸(shu)送(song)(song)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)的(de)現象，這是絕對(dui)禁止的(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。