Rockwool classification under excise tariff distinguished pristine fibre from processed articles, affecting heading placement and exemption treatment.

Rockwool in pristine fibre form, including cover wool and loose wool, was treated as mineral wool classifiable under Heading 6803, with the relevant exemption for goods containing more than 25% blast furnace slag applied to that category. Lightly resin-bonded mats, unbonded mats, resin-bonded slabs, rigid pipe sections and cut pieces were treated as processed articles made from rockwool and classifiable under Heading 6807, and after amendment under Heading 6807.10, because the Indian tariff did not extend the heading to fabricated insulating mineral materials in the same way as the HSN. The Board circular was held relevant only to wool in pristine form. Duty was therefore to be re-determined on that classification basis.

---

---

Issues: Whether rockwool products in fibre form and in article form were correctly classifiable under Heading 6803 or Heading 6807 of the Schedule to the Central Excise Tariff Act, 1985, and the consequential duty liability and exemption position.

Analysis: The classification turned on the nature of the goods at the stage of clearance. Cover wool and loose wool were found to be rockwool in pristine fibre form and were treated as mineral wools covered by Heading 6803. By contrast, lightly resin bonded mats, unbonded mats, resin bonded slabs, rigid pipe sections and cut pieces were treated as articles made from rockwool after further processing and shaping, and not as mineral wool in its original form. The Board circular relied upon by Revenue was held to apply only to wool in pristine form and not to fabricated articles. The tariff structure and the absence in the Indian tariff of the broader HSN language extending the heading to articles of insulating mineral materials supported classification of the finished articles under Heading 6807 and, after amendment, 6807.10. The exemption notifications for goods containing more than 25% blast furnace slag were therefore held applicable differently to the two categories of goods.

Conclusion: Cover wool and loose wool were held classifiable under Heading 6803 and eligible for the relevant exemption, while the processed mats, slabs and pipe sections were held classifiable under Heading 6807 or 6807.10. The matter was remanded for re-determination of duty on that basis.

---