---
kind: "section"
citation: "40 C.F.R. § 420.101"
title: "40"
number: "420.101"
heading: "Specialized definitions."
url: "https://uscodex.org/cfr/40/420.101"
---

# §420.101. Specialized definitions.

- (a) The term recirculation means those cold rolling operations which include recirculation of rolling solutions at all mill stands.
- (b) The term combination means those cold rolling operations which include recirculation of rolling solutions at one or more mill stands, and once-through use of rolling solutions at the remaining stand or stands.
- (c) The term direct application means those cold rolling operations which include once-through use of rolling solutions at all mill stands.
- (d) The term single stand means those recirculation or direct application cold rolling mills which include only one stand of work rolls.
- (e) The term multiple stands means those recirculation or direct application cold rolling mills which include more than one stand of work rolls.
- (f) The term cold worked pipe and tube means those cold forming operations that process unheated pipe and tube products using either water or oil solutions for cooling and lubrication.

## 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.