HS CODE HS Code Commodity Description 730531 OTHR TUBES,PIPS ETC,LONGITUDINALLY WELDED HAVING EXTERNAL DIAMETER >406.4MM 73053110 OTHR TUBES,PIPS ETC,LONGITUDINALLY WELDED MADE UP OF IRON 73053190 OTHR TUBES,PIPS ETC,LONGITUDINALLY WELDED MADE UO OF OTHER