Casing and tubing, of a kind used in the drilling for oil or gas, welded, of steel

Tubes, pipes and hollow profiles, of steel

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Casing and tubing, of a kind used in drilling for oil or gas, welded, of an external diameter of ≤ 406,4 mm, of steel

Casing and tubing of a kind used in drilling for oil or gas, welded, of an external diameter of > 406,4 mm, of steel

Casing and tubing, of a kind used in the drilling for oil or gas, welded, of steel

Iron or steel (excluding cast iron); casing of a kind used in drilling for oil or gas (not seamless), having circular cross-sections, external diameter exceeds 406.4mm

Iron or steel (excluding cast iron); casing and tubing of a kind used in drilling for oil and gas (other than stainless steel or seamless), n.e.c. in chapter 73

Steel, stainless; casing and tubing of a kind used in drilling for oil and gas, n.e.c. in chapter 73, welded, (not seamless)