1. 不銹鋼(gang)焊接鋼(gang)管用(yong)途(tu)不同(tong)而(er)分為(wei)如下標準。

2. 板焊管的選用。鋼板焊制不銹(xiu)鋼管（板焊管）國內尚無標準，板焊管制造標準可暫參照ASTM A671《常溫和低溫用電熔焊鋼管》、ASTM A672《中溫和高壓用電熔焊鋼管》和ASTMA691《高溫和高壓用碳素鋼和合金鋼電熔焊鋼管》，或按照GB50235《工業金屬管道工程施工及驗收規范》和GB 50316《工業金屬管道設計規范》附錄的現場制造鋼板卷管的規定要求制造。或參照GB／T 9711.1《石油天然氣工業輸送鋼管 交貨技術條件第1部分：A級鋼管》。

3. 連續爐(lu)焊(han)（鍛(duan)焊(han)）鋼(gang)管(guan)(guan)、電(dian)阻(zu)焊(han)鋼(gang)管(guan)(guan)和電(dian)弧(hu)焊(han)鋼(gang)管(guan)(guan)的(de)選用(yong)。常用(yong)的(de)焊(han)接鋼(gang)管(guan)(guan)根據其生產時(shi)采(cai)用(yong)的(de)焊(han)接工藝(yi)不同可以分(fen)為：連續爐(lu)焊(han)（鍛(duan)焊(han)）鋼(gang)管(guan)(guan)、電(dian)阻(zu)焊(han)鋼(gang)管(guan)(guan)和電(dian)弧(hu)焊(han)鋼(gang)管(guan)(guan)三種。

  ①. 連續(xu)爐(lu)焊(han)（鍛焊(han)）鋼(gang)管(guan)：連續(xu)爐(lu)焊(han)（鍛焊(han)）鋼(gang)管(guan)是在加熱爐(lu)內對鋼(gang)帶進行加熱，然后對已成型的邊緣采用(yong)機械加壓(ya)方法使(shi)其焊(han)接(jie)在一(yi)起而形成的具有(you)一(yi)條直縫的鋼(gang)管(guan)。特點(dian)：生產(chan)效率高(gao)，生產(chan)成本低(di)；但焊(han)縫質量(liang)差，綜合機械性(xing)能差。材料牌號：Q195A、Q215A、Q235A等3種。用(yong)途：適于設(she)計(ji)溫(wen)度為(wei)0～100℃、設(she)計(ji)壓(ya)力不(bu)超(chao)過0.6MPa的水和壓(ya)縮(suo)空氣系統(tong)。標(biao)準：GB／T 3091《流體(ti)輸送用(yong)焊(han)接(jie)鋼(gang)管(guan)》。

  ②. 電阻焊(han)(han)(han)(han)鋼(gang)管（electric-resistance welded steel pipe）：電阻焊(han)(han)(han)(han)鋼(gang)管是(shi)通(tong)(tong)過電阻焊(han)(han)(han)(han)或(huo)電感應焊(han)(han)(han)(han)焊(han)(han)(han)(han)接方法生(sheng)產的，帶有(you)一條直焊(han)(han)(han)(han)縫的鋼(gang)管。特點：生(sheng)產效率高，自(zi)動化程度(du)高，焊(han)(han)(han)(han)后的變形和殘余應力較(jiao)(jiao)小。設備投資高，對焊(han)(han)(han)(han)接接頭的質量(liang)要求也(ye)比較(jiao)(jiao)高。由(you)于接頭處(chu)難免有(you)雜(za)質存在，所(suo)以(yi)接頭塑性和沖擊(ji)韌(ren)性較(jiao)(jiao)低。標(biao)準：SY／T 5038《普通(tong)(tong)流體(ti)(ti)輸送(song)用(yong)螺(luo)旋縫高頻(pin)焊(han)(han)(han)(han)鋼(gang)管》，材料牌號：Q195A、Q215A、Q235A等3種，用(yong)途(tu)：適(shi)用(yong)于設計溫度(du)≤200℃的水(shui)、煤氣、空(kong)氣、采暖蒸汽等。標(biao)準：GB／T 9711.1《石油(you)天(tian)然氣工業輸送(song)鋼(gang)管交貨技術(shu)條件》，材料牌號：L175、L210，L245，L290，L320，L360，L450等15種，用(yong)途(tu)：石油(you)天(tian)然氣工業中(zhong)可(ke)燃(ran)流體(ti)(ti)和非可(ke)燃(ran)流體(ti)(ti)（中(zhong)、低壓）。

  ③. 電(dian)弧(hu)焊(han)(han)鋼(gang)(gang)(gang)(gang)管（electric-arc-welded steel pipe）：電(dian)弧(hu)焊(han)(han)鋼(gang)(gang)(gang)(gang)管是通過電(dian)弧(hu)焊(han)(han)焊(han)(han)接(jie)(jie)方(fang)法生產的鋼(gang)(gang)(gang)(gang)管。特點：接(jie)(jie)頭達(da)到完全的冶金結合，接(jie)(jie)頭的機械性(xing)能(neng)能(neng)夠完全達(da)到或(huo)達(da)到母材的機械性(xing)能(neng)。在經(jing)過適當的熱處理和(he)無損檢查之后，電(dian)弧(hu)焊(han)(han)直(zhi)(zhi)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管的使(shi)用(yong)(yong)條(tiao)件可達(da)到無縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管的使(shi)用(yong)(yong)條(tiao)件而取代之。螺旋縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管材料牌號(hao)(hao)：Q195、Q215、Q235等3種，用(yong)(yong)途：適用(yong)(yong)于設計溫(wen)度(du)≤200℃的水、煤氣、空氣、采暖蒸汽(qi)等；標準(zhun)：SY／T 5037《普(pu)通流體輸送用(yong)(yong)螺旋縫(feng)(feng)埋弧(hu)焊(han)(han)鋼(gang)(gang)(gang)(gang)管》，直(zhi)(zhi)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管材料牌號(hao)(hao)：1Cr18Ni9、0Cr19Ni9、00Cr19Ni11、0Cr18Ni10Ti、0Cr17Ni12Mo2、00Cr17Ni14Mo2共12種（新(xin)版標準(zhun)更新(xin)為新(xin)的牌號(hao)(hao)），用(yong)(yong)途：設計壓(ya)力小于5.0MPa，焊(han)(han)縫(feng)(feng)系(xi)數小于1.0時，不(bu)宜用(yong)(yong)于極(ji)度(du)或(huo)高度(du)危害介質；電(dian)弧(hu)焊(han)(han)鋼(gang)(gang)(gang)(gang)管標準(zhun)還有(you)：GB12771《流體輸送用(yong)(yong)不(bu)銹(xiu)鋼(gang)(gang)(gang)(gang)焊(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)(gang)管》，HG／T 50237.1～4《奧(ao)氏體不(bu)銹(xiu)鋼(gang)(gang)(gang)(gang)焊(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)(gang)管》。

4. 有縫焊接鋼管的特點及有關標(biao)準(zhun)。

  ①. 不銹(xiu)鋼(gang)(gang)(gang)(gang)(gang)焊(han)(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)也稱焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)，是用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)板(ban)或(huo)鋼(gang)(gang)(gang)(gang)(gang)帶(dai)經過卷(juan)曲(qu)成型(xing)后焊(han)(han)(han)(han)接(jie)(jie)制成的(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。不銹(xiu)鋼(gang)(gang)(gang)(gang)(gang)焊(han)(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)生(sheng)(sheng)(sheng)產(chan)工(gong)藝(yi)簡單，生(sheng)(sheng)(sheng)產(chan)效率(lv)高(gao)，品種(zhong)規格多(duo)(duo)，但強度一般低(di)于無縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。20世紀30年代以(yi)來，隨著(zhu)優質(zhi)帶(dai)鋼(gang)(gang)(gang)(gang)(gang)連軋生(sheng)(sheng)(sheng)產(chan)的(de)(de)(de)迅(xun)速(su)(su)發(fa)展以(yi)及(ji)焊(han)(han)(han)(han)接(jie)(jie)和檢(jian)驗技術的(de)(de)(de)進步，焊(han)(han)(han)(han)縫(feng)(feng)質(zhi)量(liang)不斷提(ti)高(gao)，焊(han)(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)品種(zhong)規格日(ri)益(yi)增(zeng)多(duo)(duo)，并在越來越多(duo)(duo)的(de)(de)(de)領域代替了(le)無縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。焊(han)(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)按焊(han)(han)(han)(han)縫(feng)(feng)的(de)(de)(de)形(xing)式分(fen)為直(zhi)縫(feng)(feng)焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)和螺旋(xuan)焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)。直(zhi)縫(feng)(feng)焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)生(sheng)(sheng)(sheng)產(chan)工(gong)藝(yi)簡單，生(sheng)(sheng)(sheng)產(chan)效率(lv)高(gao)，成本低(di)，發(fa)展較快。螺旋(xuan)焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)強度一般比(bi)直(zhi)縫(feng)(feng)焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)高(gao)，能(neng)用(yong)(yong)(yong)較窄的(de)(de)(de)坯(pi)料生(sheng)(sheng)(sheng)產(chan)管(guan)(guan)(guan)(guan)(guan)(guan)徑較大(da)的(de)(de)(de)焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)，還(huan)可以(yi)用(yong)(yong)(yong)同(tong)(tong)樣寬度的(de)(de)(de)坯(pi)料生(sheng)(sheng)(sheng)產(chan)管(guan)(guan)(guan)(guan)(guan)(guan)徑不同(tong)(tong)的(de)(de)(de)焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)。但是與相同(tong)(tong)長(chang)度的(de)(de)(de)直(zhi)縫(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)相比(bi)，焊(han)(han)(han)(han)縫(feng)(feng)長(chang)度增(zeng)加30％～100％，而且生(sheng)(sheng)(sheng)產(chan)速(su)(su)度較低(di)。因此，較小口(kou)徑的(de)(de)(de)焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)大(da)都采用(yong)(yong)(yong)直(zhi)縫(feng)(feng)焊(han)(han)(han)(han)，大(da)口(kou)徑焊(han)(han)(han)(han)管(guan)(guan)(guan)(guan)(guan)(guan)則大(da)多(duo)(duo)采用(yong)(yong)(yong)螺旋(xuan)焊(han)(han)(han)(han)。

  ②. GB 50316《工業金屬管(guan)(guan)(guan)(guan)道(dao)設(she)計(ji)規范》規定：“現(xian)行國家(jia)標準GB／T 3092《低壓流(liu)(liu)體輸送用(yong)焊接鋼(gang)管(guan)(guan)(guan)(guan)》及GB／T 3091《低壓流(liu)(liu)體輸送用(yong)鍍(du)鋅焊接鋼(gang)管(guan)(guan)(guan)(guan)》中的加(jia)厚管(guan)(guan)(guan)(guan)子，可(ke)用(yong)于設(she)計(ji)壓力小于等于1.6MPa和設(she)計(ji)溫(wen)度(du)在0～200℃的C類流(liu)(liu)體。普(pu)通厚度(du)的管(guan)(guan)(guan)(guan)子僅用(yong)于D類流(liu)(liu)體。”

  ③. 有縫鋼管(guan)(guan)(guan)通(tong)常用于低(di)壓管(guan)(guan)(guan)路(lu)。小直(zhi)(zhi)(zhi)徑的(de)有縫鋼管(guan)(guan)(guan)（公稱(cheng)直(zhi)(zhi)(zhi)徑10～150mm），常用作水(shui)、煤氣、空氣、低(di)壓蒸(zheng)汽及無侵蝕性流(liu)體的(de)管(guan)(guan)(guan)道(dao)，工作溫度(du)范(fan)圍為0～200℃。大直(zhi)(zhi)(zhi)徑的(de)有縫鋼管(guan)(guan)(guan)包括螺旋(xuan)縫電(dian)焊管(guan)(guan)(guan)（公稱(cheng)直(zhi)(zhi)(zhi)徑200～700mm）和(he)直(zhi)(zhi)(zhi)縫電(dian)焊管(guan)(guan)(guan)（公稱(cheng)直(zhi)(zhi)(zhi)徑200～1200mm）。工作溫度(du)范(fan)圍因材料而異。