Section 15 Base metals and articles of base metal 73 Articles of iron or steel 73 04 Tubes, pipes and hollow profiles, seamless, of iron (excl. cast), steel 73 04 29 Seamless iron/steel casing or tubing (excl.drill pipe)of a kind used in oil/gas 73 04 29 00 Seamless iron/steel casing or tubing (excl.drill pipe)of a kind used in oil/gas Commodity Code Description 73 04 29 00 00 Seamless iron/steel casing or tubing (excl.drill pipe)of a kind used in oil/gas