高頻直縫電阻焊管口徑：Φ219.1mm—Φ711mm，材質：Q235B、Q345B、L245、L290、L360、L415、L485、20#、API 5L.B、X42、X46、X52、X56、X60、X70、X80等。
ERW直(zhi)(zhi)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(直(zhi)(zhi)縫焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan))生(sheng)產(chan)工藝(yi)簡(jian)單(dan)，生(sheng)產(chan)效率高，成本低，發(fa)展較(jiao)快。螺旋焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)強(qiang)度(du)(du)一般(ban)比(bi)直(zhi)(zhi)縫焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)高，能(neng)用(yong)(yong)較(jiao)窄的(de)坯料生(sheng)產(chan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)徑(jing)較(jiao)大的(de)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)，還可以用(yong)(yong)同(tong)樣寬度(du)(du)的(de)坯料生(sheng)產(chan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)徑(jing)不(bu)(bu)同(tong)的(de)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。但是與相(xiang)同(tong)長(chang)度(du)(du)的(de)直(zhi)(zhi)縫管(guan)(guan)(guan)(guan)(guan)(guan)(guan)相(xiang)比(bi)，焊(han)縫長(chang)度(du)(du)增加(jia)30~100%，而且生(sheng)產(chan)速度(du)(du)較(jiao)低。直(zhi)(zhi)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)是焊(han)縫與鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)縱向平行的(de)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。通常(chang)分(fen)為公制(zhi)電焊(han)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、電焊(han)薄壁(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、變壓器冷卻油管(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)等(deng)。一般(ban)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)：一般(ban)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)用(yong)(yong)來(lai)輸送(song)低壓流體。用(yong)(yong)Q195A、Q215A、Q235A鋼(gang)(gang)(gang)制(zhi)造 。也可采用(yong)(yong)易于(yu)焊(han)接的(de)其(qi)它軟(ruan)鋼(gang)(gang)(gang)制(zhi)造。鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)要(yao)進(jin)行水壓、彎曲、壓扁等(deng)實驗(yan)，對表面質量有一定要(yao)求，通常(chang)交貨長(chang)度(du)(du)為4-10m，常(chang)要(yao)求定尺（或倍尺）交貨。焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)規格用(yong)(yong)公稱(cheng)口(kou)(kou)徑(jing)表示（毫米或英寸）公稱(cheng)口(kou)(kou)徑(jing)與實際不(bu)(bu)同(tong)，焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)按規定壁(bi)厚(hou)有普通鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)和加(jia)厚(hou)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)兩(liang)種，鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)按管(guan)(guan)(guan)(guan)(guan)(guan)(guan)端形式又分(fen)帶(dai)螺紋和不(bu)(bu)帶(dai)螺紋兩(liang)種。