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Contact SupplierWe are offering h40,j55,k55,n80-1,n80q,l80,p110 api casing oil tubing couplings from china.
Api couplings are short pieces of casing or tubing used as a kind of connection between the individual joints. They are normally made of the same grade of steel as the casing or tubing.
Many customers require the color coating on the couplings before shipment. In this way, they can easily differ the pipes after the discharge in the port.