Subheading 730511: Iron or Steel (Excluding Cast Iron); Line Pipe of a Kind Used for … etc.
Subheading 730512: Iron or Steel (Excluding Cast Iron); Line Pipe of a Kind Used for … etc.
Subheading 730519: Iron or Steel (Excluding Cast Iron); Line Pipe of a Kind Used for … etc.
Subheading 730520: Iron or Steel (Excluding Cast Iron); Casing of a Kind Used in Dril … etc.
Subheading 730531: Iron or Steel (Excluding Cast Iron); Tubes and Pipes (other than L … etc.
Subheading 730539: Iron or Steel (Excluding Cast Iron); Tubes and Pipes (other than L … etc.
Subheading 730590: Iron or Steel (Excluding Cast Iron); Tubes and Pipes N.E.C. in Hea … etc.