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 (OTHER THAN CAST IRON) 73 04 11 LINE PIPE USED FOR OIL/GAS PIPELINES, OF STAINLESS STEEL Commodity Code Description 73 04 11 00 LINE PIPE USED FOR OIL/GAS PIPELINES, OF STAINLESS STEEL