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我公司專業(yè)生產(chǎn) φ 219-1020× 5-12mm 雙面埋弧螺旋焊管,年產(chǎn) 50000 噸。產(chǎn)品采用美國林肯全線自動(dòng)雙面埋弧焊接,嚴(yán)格按照國際 GB/T9711.1-1997 和石油天然氣行業(yè)標(biāo)準(zhǔn) SY/T5037-2000 、和直縫焊管,直徑為33.7,42.3,48.3,50,55,60.3,70,73,76,88,98,102,108,114,121,127,133,139,152,159,165,168,177.8,180,194,203,219,245,273,325,351,355,377,402,426,478,508,530,630,720,820,壁厚為0.45-25.0M