Harmonized System
Section XV > Chapter 73 > Heading 7303 > 7303.00
Tubes, pipes and hollow profiles, of cast iron
Section XV > Chapter 73 > Heading 7304
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel.
Section XV > Chapter 73 > Heading 7304 > 7304.1
Line pipe of a kind used for oil or gas pipelines
Section XV > Chapter 73 > Heading 7304 > 7304.2
Casing, tubing and drill pipe, of a kind used in drilling for oil or gas
Section XV > Chapter 73 > Heading 7304 > 7304.3
Other, of circular cross-section, of iron or non-alloy steel
Section XV > Chapter 73 > Heading 7304 > 7304.4
Other, of circular cross-section, of stainless steel
Section XV > Chapter 73 > Heading 7304 > 7304.5
Other, of circular cross-section, of other alloy steel
Section XV > Chapter 73 > Heading 7304 > 7304.1 > 7304.11
Of stainless steel
Section XV > Chapter 73 > Heading 7304 > 7304.2 > 7304.22
Drill pipe of stainless steel