鍍鋅無縫鋼管，即(ji)無縫鋼管冶煉成后，在其表(biao)面鍍有一層鋅，為了防(fang)銹(xiu)。

無縫(feng)鋼管是一種具有中空截(jie)面(mian)、周邊(bian)沒有接縫(feng)的圓形，方(fang)形，矩(ju)形鋼材。

無縫鋼管(guan)生產工藝：熱軋、熱擴、冷拔

無縫鋼管是用(yong)鋼(gang)(gang)錠(ding)或實心(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯經(jing)穿(chuan)孔制(zhi)成(cheng)毛管(guan)(guan)(guan)(guan)(guan)(guan)(guan)，然后經(jing)熱(re)(re)軋(ya)(ya)(ya)(ya)(ya)、冷軋(ya)(ya)(ya)(ya)(ya)或冷撥制(zhi)成(cheng)。無(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的規格用(yong)外(wai)徑(jing)(jing)*壁(bi)(bi)(bi)厚毫米數表(biao)示。無(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)分(fen)熱(re)(re)軋(ya)(ya)(ya)(ya)(ya)和(he)冷軋(ya)(ya)(ya)(ya)(ya)（撥）無(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)兩類(lei)。 熱(re)(re)軋(ya)(ya)(ya)(ya)(ya)無(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)分(fen)一般(ban)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)，低、中(zhong)(zhong)壓(ya)(ya)鍋爐鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)，高壓(ya)(ya)鍋爐鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹(xiu)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石(shi)油裂化(hua)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、地質鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)其它鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)等。冷軋(ya)(ya)(ya)(ya)(ya)（撥）無(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)除分(fen)一般(ban)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、低中(zhong)(zhong)壓(ya)(ya)鍋爐鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、高壓(ya)(ya)鍋爐鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹(xiu)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石(shi)油裂化(hua)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、其它鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)，還包括碳素薄壁(bi)(bi)(bi)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)薄壁(bi)(bi)(bi)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹(xiu)薄壁(bi)(bi)(bi)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、異型鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。熱(re)(re)軋(ya)(ya)(ya)(ya)(ya)無(wu)縫(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)(jing)一般(ban)大(da)于(yu)32mm，壁(bi)(bi)(bi)厚2.5-75mm，冷軋(ya)(ya)(ya)(ya)(ya)無(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)(jing)可以到6mm，壁(bi)(bi)(bi)厚可到0.25mm，薄壁(bi)(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)(jing)可到5mm壁(bi)(bi)(bi)厚小于(yu)0.25mm，冷軋(ya)(ya)(ya)(ya)(ya)比熱(re)(re)軋(ya)(ya)(ya)(ya)(ya)尺寸精(jing)度(du)高。

一般(ban)用無縫鋼管是用10、20、30、35、45等(deng)(deng)優(you)質碳(tan)結(jie)鋼16Mn、5MnV等(deng)(deng)低合金結(jie)構(gou)鋼或40Cr、30CrMnSi、45Mn2、40MnB等(deng)(deng)合結(jie)鋼熱(re)軋或冷軋制(zhi)成的。10、20等(deng)(deng)低碳(tan)鋼制(zhi)造的無縫管主要用于流體輸送(song)管道(dao)。45、40Cr等(deng)(deng)中碳(tan)鋼制(zhi)成的無縫管用來制(zhi)造機(ji)械零件，如汽(qi)車、拖(tuo)拉機(ji)的受(shou)力零件。一般(ban)用無縫鋼管要保證強度(du)和(he)壓扁(bian)試驗。熱(re)軋鋼管以熱(re)軋狀(zhuang)態或熱(re)處(chu)理(li)狀(zhuang)態交貨；冷軋以熱(re)處(chu)理(li)狀(zhuang)態交貨。

無縫鋼管發展現狀

美(mei)國(guo)商務部2010年2月24日宣布(bu)初裁決定，對從中(zhong)國(guo)進口的(de)無(wu)縫鋼(gang)管征(zheng)收(shou)從11.06%至12.97%不等(deng)的(de)反補貼關稅。美(mei)國(guo)商務部在一(yi)份(fen)聲明中(zhong)說，從2006年至2008年，美(mei)國(guo)從中(zhong)國(guo)進口的(de)無(wu)縫鋼(gang)管增加了131.52%，金額增至約3.82億(yi)美(mei)元。

用(yong)途：鋼(gang)(gang)管(guan)(guan)具有中(zhong)空(kong)截面，大(da)量用(yong)作輸送(song)流體的(de)管(guan)(guan)道，如輸送(song)石(shi)油(you)、天然氣(qi)、煤(mei)氣(qi)、水(shui)及(ji)某(mou)些固體物料(liao)的(de)管(guan)(guan)道等(deng)(deng)(deng)。鋼(gang)(gang)管(guan)(guan)與圓(yuan)(yuan)鋼(gang)(gang)等(deng)(deng)(deng)實心(xin)鋼(gang)(gang)材相比，在抗彎(wan)抗扭強度相同(tong)時，重(zhong)量較輕，是一種經(jing)濟截面鋼(gang)(gang)材，廣泛用(yong)于制造結(jie)構件和機械零(ling)件，如石(shi)油(you)鉆桿(gan)、汽車(che)傳動軸(zhou)(zhou)、自行車(che)架以(yi)及(ji)建筑施工(gong)中(zhong)用(yong)的(de)鋼(gang)(gang)腳手(shou)架等(deng)(deng)(deng)用(yong)鋼(gang)(gang)管(guan)(guan)制造環形(xing)零(ling)件，可(ke)(ke)(ke)提高材料(liao)利用(yong)率(lv)，簡化制造工(gong)序，節約(yue)材料(liao)和加工(gong)工(gong)時，如滾動軸(zhou)(zhou)承(cheng)(cheng)套圈、千斤頂套等(deng)(deng)(deng)，目前已廣泛用(yong)鋼(gang)(gang)管(guan)(guan)來制造。鋼(gang)(gang)管(guan)(guan)還是各種常規(gui)武器不可(ke)(ke)(ke)缺少的(de)材料(liao)，槍(qiang)管(guan)(guan)、炮筒等(deng)(deng)(deng)都要鋼(gang)(gang)管(guan)(guan)來制造。鋼(gang)(gang)管(guan)(guan)按橫截面積(ji)形(xing)狀的(de)不同(tong)可(ke)(ke)(ke)分為(wei)圓(yuan)(yuan)管(guan)(guan)和異型管(guan)(guan)。由于在周長相等(deng)(deng)(deng)的(de)條件下(xia)，圓(yuan)(yuan)面積(ji)最大(da)，用(yong)圓(yuan)(yuan)形(xing)管(guan)(guan)可(ke)(ke)(ke)以(yi)輸送(song)更(geng)多的(de)流體。此外(wai)，圓(yuan)(yuan)環截面在承(cheng)(cheng)受內部或外(wai)部徑向壓力時，受力較均勻(yun)，因此，絕大(da)多數(shu)鋼(gang)(gang)管(guan)(guan)是圓(yuan)(yuan)管(guan)(guan)。