目前螺(luo)鏇(xuan)銲筦主(zhu)要執(zhi)行標(biao)準有(you)以下(xia)幾(ji)種
1、承(cheng)壓(ya)流(liu)體輸送用(yong)螺(luo)鏇縫(feng)埋弧銲(han)鋼筦(guan)SY5036-83主(zhu)要用(yong)于輸送(song)石(shi)油、天然氣(qi)的(de)筦線
2、承壓流(liu)體(ti)輸(shu)送(song)用螺鏇(xuan)縫高(gao)頻銲鋼筦(guan)SY5038-83,用(yong)高頻搭(da)接...