---
kind: "section"
citation: "40 C.F.R. § 420.81"
title: "40"
number: "420.81"
heading: "Specialized definitions."
url: "https://uscodex.org/cfr/40/420.81"
---

# §420.81. Specialized definitions.

- (a) The term salt bath descaling, oxidizing means the removal of scale from semi-finished steel products by the action of molten salt baths other than those containing sodium hydride.
- (b) The term salt bath descaling, reducing means the removal of scale from semi-finished steel products by the action of molten salt baths containing sodium hydride.
- (c) The term batch, sheet and plate means those descaling operations that remove surface scale from sheet and plate products in batch processes.
- (d) The term batch, rod and wire means those descaling operations that remove surface scale from rod and wire products in batch processes.
- (e) The term batch, pipe and tube means those descaling operations that remove surface scale from pipe and tube products in batch processes.
- (f) The term continuous means those descaling operations that remove surface scale from the sheet or wire products in continuous processes.
- (g) The term batch means those descaling operations in which the products are processed in discrete batches.

## Notes

### Authority

Authority: 33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, and 1361.

### Source

Source: 47 FR 23284, May 27, 1982, unless otherwise noted.