黄色三级片视频

可(ke)分為無縫鋼(gang)管(guan)(guan)(guan)和(he)有縫鋼(gang)管(guan)(guan)(guan)，有縫鋼(gang)管(guan)(guan)(guan)簡稱為直縫鋼(gang)管(guan)(guan)(guan)。無縫鋼(gang)管(guan)(guan)(guan)可(ke)用(yong)于各種行業的液體(ti)氣壓管(guan)(guan)(guan)道和(he)氣體(ti)管(guan)(guan)(guan)道等。焊接管(guan)(guan)(guan)道可(ke)用(yong)于輸水(shui)管(guan)(guan)(guan)道、煤氣管(guan)(guan)(guan)道、暖氣管(guan)(guan)(guan)道、電器(qi)管(guan)(guan)(guan)道等。

按鋼管用途分

1、管(guan)(guan)(guan)(guan)(guan)道(dao)用(yong)(yong)管(guan)(guan)(guan)(guan)(guan)。如：水、煤氣管(guan)(guan)(guan)(guan)(guan)、蒸汽管(guan)(guan)(guan)(guan)(guan)道(dao)用(yong)(yong)無縫管(guan)(guan)(guan)(guan)(guan)、石(shi)(shi)油輸送管(guan)(guan)(guan)(guan)(guan)、石(shi)(shi)油天然氣干線用(yong)(yong)管(guan)(guan)(guan)(guan)(guan)。農業灌(guan)溉用(yong)(yong)水龍頭帶管(guan)(guan)(guan)(guan)(guan)和噴(pen)灌(guan)用(yong)(yong)管(guan)(guan)(guan)(guan)(guan)等。

2、熱工設(she)備(bei)用管(guan)。如一般(ban)鍋(guo)爐用的(de)沸水管(guan)、過熱蒸(zheng)汽(qi)管(guan)，機車鍋(guo)爐用的(de)過熱管(guan)、大煙(yan)(yan)管(guan)、小煙(yan)(yan)管(guan)、拱磚管(guan)以及(ji)高(gao)溫高(gao)壓鍋(guo)爐管(guan)等。

3、機(ji)械工業用管(guan)(guan)(guan)。如航空(kong)結構管(guan)(guan)(guan)（圓管(guan)(guan)(guan)、橢圓管(guan)(guan)(guan)、平(ping)橢圓管(guan)(guan)(guan)），汽(qi)(qi)車半(ban)軸管(guan)(guan)(guan)、車軸管(guan)(guan)(guan)、汽(qi)(qi)車拖(tuo)拉機(ji)結構管(guan)(guan)(guan)、拖(tuo)拉機(ji)的油冷(leng)卻器用管(guan)(guan)(guan)、農機(ji)用方(fang)形(xing)管(guan)(guan)(guan)與矩(ju)形(xing)管(guan)(guan)(guan)、變壓器用管(guan)(guan)(guan)以及(ji)軸承用管(guan)(guan)(guan)等。

4、石(shi)油(you)地(di)質鉆(zhan)探用管(guan)(guan)(guan)。如：石(shi)油(you)鉆(zhan)探管(guan)(guan)(guan)、石(shi)油(you)鉆(zhan)桿(gan)(gan)（方鉆(zhan)桿(gan)(gan)與六角(jiao)鉆(zhan)桿(gan)(gan)）、鉆(zhan)挺、石(shi)油(you)油(you)管(guan)(guan)(guan)、石(shi)油(you)套管(guan)(guan)(guan)及各種管(guan)(guan)(guan)接頭、地(di)質鉆(zhan)探管(guan)(guan)(guan)（巖心管(guan)(guan)(guan)、套管(guan)(guan)(guan)、主動鉆(zhan)桿(gan)(gan)、鉆(zhan)挺、按箍及銷接頭等(deng)）。

5、化(hua)(hua)學工業(ye)用(yong)管(guan)(guan)(guan)。如：石油裂化(hua)(hua)管(guan)(guan)(guan)，化(hua)(hua)工設備熱交換器(qi)及管(guan)(guan)(guan)道用(yong)管(guan)(guan)(guan)、不銹耐酸管(guan)(guan)(guan)、化(hua)(hua)肥用(yong)高壓管(guan)(guan)(guan)以及輸(shu)送化(hua)(hua)工介質用(yong)管(guan)(guan)(guan)等。

6、其他各部門用(yong)管(guan)(guan)。如：容(rong)(rong)器(qi)(qi)(qi)用(yong)管(guan)(guan)（高(gao)壓(ya)氣(qi)瓶用(yong)管(guan)(guan)與一般容(rong)(rong)器(qi)(qi)(qi)管(guan)(guan)），儀表儀器(qi)(qi)(qi)用(yong)管(guan)(guan)、手表殼用(yong)管(guan)(guan)、注(zhu)射針頭(tou)及(ji)其醫療器(qi)(qi)(qi)械(xie)用(yong)管(guan)(guan)等(deng)。

按鋼管材質分

鋼(gang)(gang)(gang)管(guan)按(an)制管(guan)材質(zhi)（即鋼(gang)(gang)(gang)種）可(ke)(ke)(ke)分為：碳(tan)素管(guan)和合(he)(he)金(jin)管(guan)、不(bu)(bu)銹(xiu)鋼(gang)(gang)(gang)管(guan)等。碳(tan)素管(guan)又可(ke)(ke)(ke)分為普通碳(tan)素鋼(gang)(gang)(gang)管(guan)和優質(zhi)碳(tan)素結(jie)(jie)構管(guan)。合(he)(he)金(jin)管(guan)又可(ke)(ke)(ke)分為：低合(he)(he)金(jin)管(guan)、合(he)(he)金(jin)結(jie)(jie)構管(guan)、高合(he)(he)金(jin)管(guan)、高強(qiang)度管(guan)。軸承(cheng)管(guan)、耐熱耐酸(suan)不(bu)(bu)銹(xiu)管(guan)、精密合(he)(he)金(jin)（如(ru)可(ke)(ke)(ke)伐合(he)(he)金(jin)）管(guan)以及高溫合(he)(he)金(jin)管(guan)等。