對于有縫與無縫的生產工藝區別就沒有必要說了，主要說一下使用區別：1、有縫鋼管一般能夠承受的 使用壓力在20公斤以內這是的使用范圍。它一般用于輸水、煤氣、壓縮空氣等低壓流體；
2、無(wu)縫(feng)(feng)(feng)管(guan)可(ke)以承受超高(gao)壓(ya)，當(dang)然(ran)其(qi)壁厚也會隨之增(zeng)加(jia)，這需要根據壓(ya)力(li)要求來進(jin)行(xing)設計。它一般用(yong)于(yu)高(gao)壓(ya)油(you)管(guan)、鍋爐管(guan)等(deng)高(gao)溫高(gao)壓(ya)的(de)設備使用(yong)。也有(you)(you)結構用(yong)的(de)無(wu)縫(feng)(feng)(feng)管(guan)，這就(jiu)看設計要求了(le)。3、當(dang)前也有(you)(you)一些(xie)有(you)(you)縫(feng)(feng)(feng)鋼(gang)(gang)管(guan)無(wu)縫(feng)(feng)(feng)化處(chu)理的(de)管(guan)，它是對(dui)焊縫(feng)(feng)(feng)進(jin)行(xing)了(le)退火處(chu)理，了(le)焊縫(feng)(feng)(feng)的(de)殘余應力(li)，使焊縫(feng)(feng)(feng)與(yu)母(mu)材相(xiang)當(dang)，其(qi)承壓(ya)范圍基本與(yu)無(wu)縫(feng)(feng)(feng)管(guan)相(xiang)當(dang)。也可(ke)考(kao)慮(lv)使用(yong)。4、當(dang)然(ran)市場上也有(you)(you)一些(xie)采用(yong)有(you)(you)縫(feng)(feng)(feng)鋼(gang)(gang)管(guan)整體(ti)加(jia)熱以后再拉撥(bo)或帶芯頭軋制的(de)無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)管(guan)，主(zhu)要以小規格為主(zhu)，這類管(guan)僅在外(wai)形方(fang)面屬于(yu)無(wu)縫(feng)(feng)(feng)管(guan)，其(qi)實質并不(bu)是很好，要注

意哦！！
無縫鋼管一般是將熔融狀態的鋼水通過環形狹縫積壓出來后再將拉伸等處理工藝成型（無縫鋼管安生產方法不同可分為熱軋管、冷軋管、冷拔管、擠壓管等） ，這樣就沒有焊縫，在性能上，尤其是承壓能力上較普通鋼管有很大提高，所以經常被用于高壓設備上使用。但壓力等級是根據口徑和壁厚而定的，不是按焊縫來的，可是普通鋼管的焊縫部位是其薄弱環節，焊縫質量也是影響其整體性能的主要因素。在北方生活過的人一般都有過自來水管或暖氣管在冬天被凍爆的經歷，爆的地方一般都是焊縫處，所以一般高壓的地方一般不采用焊管。無縫焊管采用工藝為熱軋和冷拔，焊管用板材焊接而成，焊縫有直焊縫、螺旋焊縫等。使用條件比無縫焊管受的限制多。
無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)焊管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)用(yong)(yong)實(shi)心管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)胚經(jing)穿(chuan)孔(kong)后軋(ya)(ya)制(zhi)(zhi)的(de)(de)(de)(de)(de)(de)。1.生(sheng)(sheng)產制(zhi)(zhi)造方(fang)(fang)(fang)法(fa)按(an)(an)(an)生(sheng)(sheng)產方(fang)(fang)(fang)法(fa)不(bu)(bu)同分(fen)(fen)為(wei)(wei)(wei)熱(re)軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、冷(leng)(leng)(leng)軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、冷(leng)(leng)(leng)拔(ba)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、擠(ji)壓(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)。1.1熱(re)軋(ya)(ya)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)一(yi)般在(zai)(zai)(zai)自動(dong)軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)機(ji)組(zu)上生(sheng)(sheng)產。實(shi)心管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)經(jing)檢(jian)查并(bing)表面(mian)(mian)缺陷(xian)，截(jie)成(cheng)(cheng)(cheng)所需(xu)(xu)長度，在(zai)(zai)(zai)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)穿(chuan)孔(kong)端(duan)端(duan)面(mian)(mian)上定(ding)心，然后送往(wang)加(jia)(jia)熱(re)爐加(jia)(jia)熱(re)，在(zai)(zai)(zai)穿(chuan)孔(kong)機(ji)上穿(chuan)孔(kong)。在(zai)(zai)(zai)穿(chuan)孔(kong)同時(shi)不(bu)(bu)斷旋轉和(he)(he)前進(jin)(jin)(jin)(jin)(jin)，在(zai)(zai)(zai)扎(zha)混和(he)(he)頂頭(tou)的(de)(de)(de)(de)(de)(de)作用(yong)(yong)下，管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)內(nei)部(bu)逐漸形(xing)(xing)(xing)成(cheng)(cheng)(cheng)空腔，稱(cheng)毛管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。再(zai)送至自動(dong)軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)機(ji)上繼續軋(ya)(ya)制(zhi)(zhi)。 經(jing)均整壁(bi)(bi)厚(hou)(hou)(hou)，經(jing)定(ding)徑機(ji)定(ding)徑，達(da)到規(gui)(gui)格(ge)要(yao)(yao)求。利(li)用(yong)(yong)連(lian)續式軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)機(ji)組(zu)生(sheng)(sheng)產熱(re)軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)較(jiao)(jiao)先進(jin)(jin)(jin)(jin)(jin)的(de)(de)(de)(de)(de)(de)方(fang)(fang)(fang)法(fa)。1.2若(ruo)欲(yu)獲得(de)尺(chi)寸更小和(he)(he)質(zhi)(zhi)量(liang)(liang)(liang)更好的(de)(de)(de)(de)(de)(de)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，必(bi)須采用(yong)(yong)冷(leng)(leng)(leng)軋(ya)(ya)、冷(leng)(leng)(leng)拔(ba)或者兩者聯合(he)(he)的(de)(de)(de)(de)(de)(de)方(fang)(fang)(fang)法(fa)。冷(leng)(leng)(leng)軋(ya)(ya)通(tong)常在(zai)(zai)(zai)二(er)輥(gun)式軋(ya)(ya)機(ji)上進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)，鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)在(zai)(zai)(zai)變(bian)斷你、面(mian)(mian)圓(yuan)孔(kong)槽和(he)(he)不(bu)(bu)動(dong)的(de)(de)(de)(de)(de)(de)錐形(xing)(xing)(xing)頂頭(tou)所組(zu)成(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)環形(xing)(xing)(xing)孔(kong)型中(zhong)(zhong)軋(ya)(ya)制(zhi)(zhi)。冷(leng)(leng)(leng)拔(ba)通(tong)常在(zai)(zai)(zai)0.5-100t的(de)(de)(de)(de)(de)(de)單練是(shi)或雙(shuang)鏈(lian)式冷(leng)(leng)(leng)拔(ba)機(ji)上進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)。1.3擠(ji)壓(ya)法(fa)即將加(jia)(jia)熱(re)好的(de)(de)(de)(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)放在(zai)(zai)(zai)密(mi)閉(bi)的(de)(de)(de)(de)(de)(de)擠(ji)壓(ya)圓(yuan)筒(tong)中(zhong)(zhong)，穿(chuan)孔(kong)棒與擠(ji)壓(ya)桿一(yi)起運動(dong)，使擠(ji)壓(ya)件從較(jiao)(jiao)小的(de)(de)(de)(de)(de)(de)模孔(kong)中(zhong)(zhong)擠(ji)出。此方(fang)(fang)(fang)法(fa)可(ke)生(sheng)(sheng)產直徑較(jiao)(jiao)小的(de)(de)(de)(de)(de)(de)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。用(yong)(yong)途無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)用(yong)(yong)途很廣泛。一(yi)般用(yong)(yong)途的(de)(de)(de)(de)(de)(de)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)由普(pu)(pu)通(tong)碳素結(jie)構(gou)(gou)鋼(gang)(gang)、低(di)合(he)(he)金(jin)結(jie)構(gou)(gou)鋼(gang)(gang)或合(he)(he)金(jin)結(jie)構(gou)(gou)鋼(gang)(gang)軋(ya)(ya)制(zhi)(zhi)，產量(liang)(liang)(liang)多(duo)，主(zhu)要(yao)(yao)用(yong)(yong)作輸送流體的(de)(de)(de)(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道或結(jie)構(gou)(gou)零(ling)件。根據用(yong)(yong)途不(bu)(bu)分(fen)(fen)為(wei)(wei)(wei)三(san)類(lei)供(gong)應(ying)：按(an)(an)(an)化(hua)學(xue)成(cheng)(cheng)(cheng)分(fen)(fen)和(he)(he)機(ji)械(xie)性能(neng)供(gong)應(ying)，按(an)(an)(an)機(ji)械(xie)性能(neng)供(gong)應(ying)，按(an)(an)(an)水(shui)(shui)(shui)(shui)壓(ya)試(shi)(shi)驗(yan)供(gong)應(ying)。如(ru)用(yong)(yong)于承受(shou)液體壓(ya)力，也(ye)(ye)要(yao)(yao)進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)水(shui)(shui)(shui)(shui)壓(ya)試(shi)(shi)驗(yan)。專門用(yong)(yong)途的(de)(de)(de)(de)(de)(de)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)有(you)(you)(you)鍋爐用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、地質(zhi)(zhi)用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)及石油用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)多(duo)種(zhong)。種(zhong)類(lei)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按(an)(an)(an)生(sheng)(sheng)產方(fang)(fang)(fang)法(fa)不(bu)(bu)同可(ke)分(fen)(fen)為(wei)(wei)(wei)熱(re)軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、冷(leng)(leng)(leng)軋(ya)(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、冷(leng)(leng)(leng)拔(ba)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、擠(ji)壓(ya)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按(an)(an)(an)外形(xing)(xing)(xing)分(fen)(fen)類(lei)有(you)(you)(you)圓(yuan)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、異(yi)型管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)之(zhi)分(fen)(fen)異(yi)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)除方(fang)(fang)(fang)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)矩形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外，還(huan)有(you)(you)(you)橢圓(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、半圓(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、三(san)角形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、六(liu)角形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、凸字形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、梅花形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)。按(an)(an)(an)材質(zhi)(zhi)的(de)(de)(de)(de)(de)(de)不(bu)(bu)同，分(fen)(fen)為(wei)(wei)(wei)普(pu)(pu)通(tong)碳素結(jie)構(gou)(gou)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、低(di)合(he)(he)金(jin)結(jie)構(gou)(gou)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、優質(zhi)(zhi)碳素結(jie)構(gou)(gou)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)結(jie)構(gou)(gou)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)(bu)銹管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)。按(an)(an)(an)專門用(yong)(yong)途分(fen)(fen)，有(you)(you)(you)鍋爐管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、地質(zhi)(zhi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石油管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)規(gui)(gui)格(ge)及外觀質(zhi)(zhi)量(liang)(liang)(liang)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)內(nei)外表面(mian)(mian)不(bu)(bu)得(de)有(you)(you)(you)裂縫(feng)(feng)(feng)(feng)、折(zhe)疊、軋(ya)(ya)折(zhe)、離層、發紋和(he)(he)結(jie)疤缺陷(xian)存在(zai)(zai)(zai)。這些(xie)缺陷(xian)應(ying)完全掉，后不(bu)(bu)得(de)使壁(bi)(bi)厚(hou)(hou)(hou)和(he)(he)外徑超過負偏差。鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)兩端(duan)應(ying)切(qie)成(cheng)(cheng)(cheng)直角，并(bing)毛刺。壁(bi)(bi)厚(hou)(hou)(hou)大(da)于20mm的(de)(de)(de)(de)(de)(de)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)允許(xu)氣割和(he)(he)熱(re)據切(qie)割。經(jing)供(gong)需(xu)(xu)雙(shuang)方(fang)(fang)(fang)也(ye)(ye)不(bu)(bu)可(ke)切(qie)頭(tou)。冷(leng)(leng)(leng)拔(ba)或冷(leng)(leng)(leng)軋(ya)(ya)精(jing)密(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)表面(mian)(mian)質(zhi)(zhi)量(liang)(liang)(liang)參照(zhao)GB3639-83化(hua)學(xue)成(cheng)(cheng)(cheng)分(fen)(fen)檢(jian)驗(yan)按(an)(an)(an)水(shui)(shui)(shui)(shui)壓(ya)試(shi)(shi)驗(yan)供(gong)應(ying)的(de)(de)(de)(de)(de)(de)國產無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)必(bi)須保證標(biao)(biao)準(zhun)所規(gui)(gui)定(ding)的(de)(de)(de)(de)(de)(de)水(shui)(shui)(shui)(shui)壓(ya)試(shi)(shi)驗(yan)。進(jin)(jin)(jin)(jin)(jin)口(kou)(kou)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)物(wu)理性能(neng)檢(jian)驗(yan)合(he)(he)同規(gui)(gui)定(ding)的(de)(de)(de)(de)(de)(de)有(you)(you)(you)關標(biao)(biao)準(zhun)進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)。主(zhu)要(yao)(yao)進(jin)(jin)(jin)(jin)(jin)出口(kou)(kou)情況。一(yi)般無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)進(jin)(jin)(jin)(jin)(jin)口(kou)(kou)量(liang)(liang)(liang)很大(da)。主(zhu)要(yao)(yao)進(jin)(jin)(jin)(jin)(jin)口(kou)(kou) 是(shi)的(de)(de)(de)(de)(de)(de)德國和(he)(he)日本。歐洲 如(ru)羅(luo)馬尼亞、俄羅(luo)斯、瑞(rui)士、法(fa)國、西(xi)班牙、捷克、南(nan)斯拉斯、匈牙利(li)等(deng)(deng)國都有(you)(you)(you)進(jin)(jin)(jin)(jin)(jin)口(kou)(kou)。還(huan)有(you)(you)(you)少(shao)量(liang)(liang)(liang)從南(nan)美的(de)(de)(de)(de)(de)(de)阿根廷、墨西(xi)哥等(deng)(deng)國進(jin)(jin)(jin)(jin)(jin)口(kou)(kou)。有(you)(you)(you)縫(feng)(feng)(feng)(feng)金(jin)屬管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)可(ke)分(fen)(fen)為(wei)(wei)(wei)水(shui)(shui)(shui)(shui)、煤氣鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)電焊管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)兩大(da)類(lei)，水(shui)(shui)(shui)(shui)。煤氣鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)一(yi)般用(yong)(yong)普(pu)(pu)通(tong)碳素鋼(gang)(gang)制(zhi)(zhi)成(cheng)(cheng)(cheng)。按(an)(an)(an)其表面(mian)(mian)質(zhi)(zhi)量(liang)(liang)(liang)分(fen)(fen)鍍(du)鋅管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)不(bu)(bu)鍍(du)鋅管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)兩種(zhong)。按(an)(an)(an)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)壁(bi)(bi)厚(hou)(hou)(hou)度又可(ke)分(fen)(fen)為(wei)(wei)(wei)普(pu)(pu)通(tong)的(de)(de)(de)(de)(de)(de)加(jia)(jia)厚(hou)(hou)(hou)的(de)(de)(de)(de)(de)(de)和(he)(he)薄壁(bi)(bi)的(de)(de)(de)(de)(de)(de)三(san)種(zhong)。他主(zhu)要(yao)(yao)應(ying)用(yong)(yong)在(zai)(zai)(zai)水(shui)(shui)(shui)(shui)喝、、煤氣罐路上。所以(yi)稱(cheng)為(wei)(wei)(wei)水(shui)(shui)(shui)(shui)、煤氣罐，電焊鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)用(yong)(yong)低(di)碳薄鋼(gang)(gang)板卷尺(chi)