给水用(yong)(yong)(yong)螺(luo)(luo)(luo)旋(xuan)钢(gang)(gang)管(guan)(guan)(guan)是(shi)指(zhi)用(yong)(yong)(yong)钢(gang)(gang)带(dai)或钢(gang)(gang)板弯(wan)曲(qu)变(bian)形(xing)为(wei)(wei)圆形(xing)、方形(xing)等(deng)(deng)形(xing)状后再焊(han)(han)(han)(han)(han)接成(cheng)的(de)(de)、表面有接缝(feng)(feng)(feng)的(de)(de)钢(gang)(gang)管(guan)(guan)(guan)。按焊(han)(han)(han)(han)(han)接方法(fa)不同可分为(wei)(wei)电弧焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)、高频(pin)或低(di)(di)频(pin)电阻焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)、气焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)、炉(lu)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)、邦迪管(guan)(guan)(guan)等(deng)(deng)。按焊(han)(han)(han)(han)(han)缝(feng)(feng)(feng)形(xing)状可分为(wei)(wei)直(zhi)缝(feng)(feng)(feng)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)和(he)螺(luo)(luo)(luo)旋(xuan)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)。电焊(han)(han)(han)(han)(han)钢(gang)(gang)管(guan)(guan)(guan)用(yong)(yong)(yong)于石油钻(zuan)采(cai)和(he)机械 制造业等(deng)(deng)。炉(lu)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)可用(yong)(yong)(yong)作水煤气管(guan)(guan)(guan)等(deng)(deng)，大(da)口径直(zhi)缝(feng)(feng)(feng)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)用(yong)(yong)(yong)于高压油气输(shu)送等(deng)(deng)；螺(luo)(luo)(luo)旋(xuan)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)用(yong)(yong)(yong)于油气输(shu)送、管(guan)(guan)(guan)桩、桥(qiao)墩等(deng)(deng)。焊(han)(han)(han)(han)(han)接钢(gang)(gang)管(guan)(guan)(guan)比无缝(feng)(feng)(feng)钢(gang)(gang)管(guan)(guan)(guan)成(cheng)本低(di)(di)、生(sheng)(sheng)产(chan)效率高。直(zhi)缝(feng)(feng)(feng)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)生(sheng)(sheng)产(chan)工艺简单，生(sheng)(sheng)产(chan)效率高，成(cheng)本低(di)(di)，发展较快(kuai)。螺(luo)(luo)(luo)旋(xuan)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)的(de)(de)强度(du)一般比直(zhi)缝(feng)(feng)(feng)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)高，能用(yong)(yong)(yong)较窄(zhai)的(de)(de)坯料(liao)生(sheng)(sheng)产(chan)管(guan)(guan)(guan)径较大(da)的(de)(de)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)，还可以用(yong)(yong)(yong)同样宽度(du)的(de)(de)坯料(liao)生(sheng)(sheng)产(chan)管(guan)(guan)(guan)径不同的(de)(de)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)。但是(shi)与相(xiang)同长度(du)的(de)(de)直(zhi)缝(feng)(feng)(feng)管(guan)(guan)(guan)相(xiang)比，焊(han)(han)(han)(han)(han)缝(feng)(feng)(feng)长度(du)增加(jia)30~100%，而且生(sheng)(sheng)产(chan)速度(du)较低(di)(di)。因(yin)此，较小(xiao)口径的(de)(de)焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)大(da)都(dou)采(cai)用(yong)(yong)(yong)直(zhi)缝(feng)(feng)(feng)焊(han)(han)(han)(han)(han)，大(da)口径焊(han)(han)(han)(han)(han)管(guan)(guan)(guan)则大(da)多采(cai)用(yong)(yong)(yong)螺(luo)(luo)(luo)旋(xuan)焊(han)(han)(han)(han)(han)。