在(zai)我國的鋼(gang)(gang)管(guan)(guan)(guan)制造標準中(zhong)，有(you)(you)(you)結(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)和流(liu)(liu)體(ti)輸(shu)(shu)(shu)(shu)送(song)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)之分(fen)。結(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)主要用(yong)(yong)于(yu)一般金屬結(jie)(jie)(jie)構(gou)(gou)如橋、梁(liang)、鋼(gang)(gang)構(gou)(gou)架等，它只(zhi)要求(qiu)保證強度與剛度，而(er)對(dui)鋼(gang)(gang)管(guan)(guan)(guan)的嚴密性不作(zuo)要求(qiu)。流(liu)(liu)體(ti)輸(shu)(shu)(shu)(shu)送(song)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)：主要用(yong)(yong)于(yu)帶有(you)(you)(you)壓(ya)力的流(liu)(liu)體(ti)輸(shu)(shu)(shu)(shu)送(song)，它除了要保證有(you)(you)(you)符合相應要求(qiu)的強度與剛度外，還要求(qiu)保證密閉(bi)性，即在(zai)出廠(chang)前要求(qiu)逐根進(jin)行(xing)水壓(ya)試驗。對(dui)壓(ya)力管(guan)(guan)(guan)道來說，它輸(shu)(shu)(shu)(shu)送(song)的介(jie)質常常是易(yi)燃、易(yi)爆(bao)、有(you)(you)(you)毒、有(you)(you)(you)溫度、有(you)(you)(you)壓(ya)力的介(jie)質，故應選用(yong)(yong)流(liu)(liu)體(ti)輸(shu)(shu)(shu)(shu)送(song)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)。在(zai)實(shi)際(ji)的工(gong)程(cheng)設計、采(cai)購和施工(gong)中(zhong)，發現有(you)(you)(you)用(yong)(yong)結(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)代替流(liu)(liu)體(ti)輸(shu)(shu)(shu)(shu)送(song)用(yong)(yong)鋼(gang)(gang)管(guan)(guan)(guan)的現象，這是絕對(dui)禁(jin)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。