| Tariff Classification | TCO Number | TCO description | Operative date | Decision date |
| 7507.20.00 | 9804133 |
PIPE FITTINGS, nickel alloy 31, UNS N08031, being ANY of the
following:
(a) buttweld, being ANY of the following:
(i) 45 degrees OR 90 degrees elbows;
(ii) tees;
(iii) stub-ends;
(b) flanges, spacers
| 14/05/1998 | 17/08/1998 |
| 7507.20.00 | 25269492 |
FERRULES, WASTE HEAT BOILER, alloy 602 MCA AND/OR alloy 602 CA,
having a diameter NOT greater 240 mm
| 17/11/2025 | 16/02/2026 |
