Harmonized System
Section XV > Chapter 73 > Heading 7305 > 7305.3
Other, welded
Section XV > Chapter 73 > Heading 7305 > 7305.1 > 7305.11
Longitudinally submerged arc welded
Section XV > Chapter 73 > Heading 7305 > 7305.1 > 7305.12
Other, longitudinally welded
Section XV > Chapter 73 > Heading 7305 > 7305.20
Casing of a kind used in drilling for oil or gas
Section XV > Chapter 73 > Heading 7305 > 7305.3 > 7305.31
Longitudinally welded
Section XV > Chapter 73 > Heading 7306
Other tubes, pipes and hollow profiles (for example, open seam or welded, riveted or similarly closed), of iron or steel.
Section XV > Chapter 73 > Heading 7306 > 7306.1
Line pipe of a kind used for oil or gas pipelines