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        Tubing & Casing
        
							
        Hilong can supply Non-API Casing & Tubing Series, including:1.Premium Connection OCTG, with CAL IV certificate.2.Anti-H2S Corrosion OCTG.3.CO2 Corrosion Resistant OCTG.4.High Strength Anti Collapse OCTG.5.High Collapse and Sour Service.6.Heavy Oil Thermal Recovery OCTG.7.Insulated tubing