高频直缝电阻焊管口径：Φ219.1mm—Φ711mm，材质：Q235B、Q345B、L245、L290、L360、L415、L485、20#、API 5L.B、X42、X46、X52、X56、X60、X70、X80等。
ERW直缝(feng)(feng)钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(直缝(feng)(feng)焊(han)(han)管(guan)(guan)(guan)(guan)(guan))生(sheng)(sheng)产工艺简单，生(sheng)(sheng)产效(xiao)率高，成(cheng)本低(di)，发(fa)展较(jiao)快。螺旋焊(han)(han)管(guan)(guan)(guan)(guan)(guan)的(de)强度(du)(du)一(yi)(yi)般(ban)比直缝(feng)(feng)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)高，能(neng)用(yong)(yong)较(jiao)窄的(de)坯(pi)料生(sheng)(sheng)产管(guan)(guan)(guan)(guan)(guan)径(jing)较(jiao)大的(de)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)，还可以用(yong)(yong)同样(yang)宽(kuan)度(du)(du)的(de)坯(pi)料生(sheng)(sheng)产管(guan)(guan)(guan)(guan)(guan)径(jing)不同的(de)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)。但是与相同长度(du)(du)的(de)直缝(feng)(feng)管(guan)(guan)(guan)(guan)(guan)相比，焊(han)(han)缝(feng)(feng)长度(du)(du)增加30~100%，而且生(sheng)(sheng)产速度(du)(du)较(jiao)低(di)。直缝(feng)(feng)钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)是焊(han)(han)缝(feng)(feng)与钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)纵向平行的(de)钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。通(tong)常(chang)分为公制(zhi)(zhi)电焊(han)(han)钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、电焊(han)(han)薄壁管(guan)(guan)(guan)(guan)(guan)、变压器冷却(que)油管(guan)(guan)(guan)(guan)(guan)等(deng)(deng)等(deng)(deng)。一(yi)(yi)般(ban)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)：一(yi)(yi)般(ban)焊(han)(han)管(guan)(guan)(guan)(guan)(guan)用(yong)(yong)来输送低(di)压流体(ti)。用(yong)(yong)Q195A、Q215A、Q235A钢(gang)(gang)制(zhi)(zhi)造 。也可采用(yong)(yong)易于焊(han)(han)接的(de)其它软钢(gang)(gang)制(zhi)(zhi)造。钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)要(yao)进行水压、弯曲、压扁等(deng)(deng)实(shi)验，对表(biao)(biao)面质量(liang)有一(yi)(yi)定要(yao)求，通(tong)常(chang)交(jiao)货长度(du)(du)为4-10m，常(chang)要(yao)求定尺(chi)（或倍(bei)尺(chi)）交(jiao)货。焊(han)(han)管(guan)(guan)(guan)(guan)(guan)的(de)规格用(yong)(yong)公称口径(jing)表(biao)(biao)示（毫(hao)米或英寸）公称口径(jing)与实(shi)际不同，焊(han)(han)管(guan)(guan)(guan)(guan)(guan)按规定壁厚有普通(tong)钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)和加厚钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)两种，钢(gang)(gang)管(guan)(guan)(guan)(guan)(guan)按管(guan)(guan)(guan)(guan)(guan)端(duan)形(xing)式又分带(dai)螺纹和不带(dai)螺纹两种。