無(wu)(wu)(wu)縫(feng)(feng)鋼(gang)管(guan)用(yong)(yong)(yong)途很廣泛。一般(ban)用(yong)(yong)(yong)途的無(wu)(wu)(wu)縫(feng)(feng)鋼(gang)管(guan)由普通(tong)碳素結構鋼(gang)、 低合金結構鋼(gang)或合金結構鋼(gang)軋(ya)制，產(chan)量較多,主要用(yong)(yong)(yong)作輸送(song)流體(ti)(ti)的管(guan)道或結構零件。.2、 根據用(yong)(yong)(yong)途不同(tong)分三類供(gong)應(ying): a.按(an)化學成分和機械性能供(gong)應(ying); b、按(an)機械性能供(gong)應(ying); C、按(an)水(shui)壓試(shi)驗(yan)供(gong)應(ying)。按(an)a、b類供(gong)應(ying)的鋼(gang)管(guan),如用(yong)(yong)(yong)于承受液體(ti)(ti)動(dong),也要進行水(shui)壓試(shi)驗(yan)。3、專(zhuan)門用(yong)(yong)(yong)途的無(wu)(wu)(wu)縫(feng)(feng)管(guan)有鍋爐用(yong)(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)管(guan)、地質用(yong)(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)鋼(gang)管(guan)及石油用(yong)(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)管(guan)等多種。
焊(han)(han)接(jie)(jie)鋼(gang)管(guan)(guan)也(ye)稱焊(han)(han)管(guan)(guan),是(shi)用(yong)鋼(gang)板或鋼(gang)帶經過卷曲(qu)成型后焊(han)(han)接(jie)(jie)制成的(de)(de)鋼(gang)管(guan)(guan)鋼(gang)管(guan)(guan)。焊(han)(han)接(jie)(jie)鋼(gang)管(guan)(guan)生(sheng)產(chan)(chan)(chan)工藝簡單,生(sheng)產(chan)(chan)(chan)效(xiao)率高(gao)，品(pin)種規格(ge)(ge)多(duo),設備資(zi)少,但一(yi)般(ban)強(qiang)度低于無(wu)縫鋼(gang)管(guan)(guan)。20世紀30年代以來(lai),隨著優質(zhi)帶鋼(gang)連軋生(sheng)產(chan)(chan)(chan)的(de)(de)迅(xun)速發(fa)展以及(ji)焊(han)(han)接(jie)(jie)和檢驗(yan)技術的(de)(de)進步,焊(han)(han)縫質(zhi)量不斷提高(gao)，焊(han)(han)接(jie)(jie)鋼(gang)管(guan)(guan)的(de)(de)品(pin)種規格(ge)(ge)日(ri)益增多(duo)，并(bing)在越(yue)來(lai)越(yue)多(duo)的(de)(de)領域代替(ti)了無(wu)縫鋼(gang)管(guan)(guan)。
焊(han)接鋼管(guan)按焊(han)縫(feng)的(de)(de)(de)形式分為直(zhi)縫(feng)焊(han)管(guan)和螺旋(xuan)焊(han)管(guan)。直(zhi)縫(feng)焊(han)管(guan)生(sheng)(sheng)產(chan)工藝(yi)簡單 ,生(sheng)(sheng)產(chan)效(xiao)率高(gao)，成本低，發展較(jiao)快。螺旋(xuan)焊(han)管(guan)的(de)(de)(de)強度一般比(bi)直(zhi)縫(feng)焊(han)管(guan)高(gao),能用較(jiao)窄(zhai)的(de)(de)(de)坯(pi)料生(sheng)(sheng)產(chan)管(guan)徑較(jiao)大(da)的(de)(de)(de)焊(han)管(guan),還可以(yi)用同(tong)樣(yang)寬度的(de)(de)(de)坯(pi)料生(sheng)(sheng)產(chan)管(guan)徑不同(tong)的(de)(de)(de)焊(han)管(guan)。但是與(yu)相同(tong)長(chang)度的(de)(de)(de)直(zhi)縫(feng)管(guan)相比(bi),焊(han)縫(feng)長(chang)度增加30~ 100% ,租生(sheng)(sheng)產(chan)速度較(jiao)低。因此，較(jiao)小口徑的(de)(de)(de)焊(han)管(guan)大(da)都(dou)采用直(zhi)縫(feng)焊(han),大(da)加徑焊(han)管(guan)則(ze)大(da)多采用螺旋(xuan)焊(han)。
