730511 | PIPE oil and gas pipelines, longitudinal welded fabricated by submerged arc welding |
73051111 | OTHER TUBES AND PIPES (FOR EXAMPLE, WELDED, RIVETED OR SIMILARLY CLOSED), HAVING CIRCULAR CROSS-SECTIONS, THE EXTERNAL DIAMETER OF WHICH EXCEEDS 406.4 MM, OF IRON OR STEEL - LINE PIPE OF A KIND USED FOR OIL OR GAS PIPELINES : LONGITUDINALLY SUBMERGED ARC WELDED : GALVANISED PIPES : OF IRON |
73051119 | OTHER TUBES AND PIPES (FOR EXAMPLE, WELDED, RIVETED OR SIMILARLY CLOSED), HAVING CIRCULAR CROSS-SECTIONS, THE EXTERNAL DIAMETER OF WHICH EXCEEDS 406.4 MM, OF IRON OR STEEL - LINE PIPE OF A KIND USED FOR OIL OR GAS PIPELINES : LONGITUDINALLY SUBMERGED ARC WELDED : GALVANISED PIPES : OTHER |
73051121 | OTHER TUBES AND PIPES (FOR EXAMPLE, WELDED, RIVETED OR SIMILARLY CLOSED), HAVING CIRCULAR CROSS-SECTIONS, THE EXTERNAL DIAMETER OF WHICH EXCEEDS 406.4 MM, OF IRON OR STEEL - LINE PIPE OF A KIND USED FOR OIL OR GAS PIPELINES : NON-GALVANISED PIPES : OF IRON |
73051129 | OTHER TUBES AND PIPES (FOR EXAMPLE, WELDED, RIVETED OR SIMILARLY CLOSED), HAVING CIRCULAR CROSS-SECTIONS, THE EXTERNAL DIAMETER OF WHICH EXCEEDS 406.4 MM, OF IRON OR STEEL - LINE PIPE OF A KIND USED FOR OIL OR GAS PIPELINES : NON-GALVANISED PIPES : OTHER |