我公司专业生产 φ 219-1020× 5-12mm 双面埋弧螺旋焊管，年产 50000 吨。产品采用美国林肯全线自动双面埋弧焊接，严格按照国际 GB/T9711.1-1997 和石油天然气行业标准 SY/T5037-2000 、和直缝焊管,直径为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,壁厚为0.45-25.0M