---
kind: "section"
citation: "29 C.F.R. § 1910.251"
title: "29"
number: "1910.251"
heading: "Definitions."
url: "https://uscodex.org/cfr/29/1910.251"
---

# §1910.251. Definitions.


As used in this subpart:

- (a) **Welder—** and welding operator mean any operator of electric or gas welding and cutting equipment.
- (b) Approved means listed or approved by a nationally recognized testing laboratory. Refer to [§ 1910.155(c)(3)](/cfr/29/1910.155.md?p=c-3) for definitions of listed and approved, and [§ 1910.7](/cfr/29/1910.7.md) for nationally recognized testing laboratory.

## Notes

### Amendments

[55 FR 13696, Apr. 11, 1990, as amended at 61 FR 9240, Mar. 7, 1996; 72 FR 71070, Dec. 14, 2007]

### Authority

Authority: Sections 4, 6, and 8 of the Occupational Safety and Health Act of 1970 (29 U.S.C. 653, 655, and 657); Secretary of Labor's Orders Nos. 12-71 (36 FR 8754), 8-76 (41 FR 25059), 9-83 (48 FR 35736), 1-90 (55 FR 9033), 6-96 (62 FR 111), 3-2000 (65 FR 50017), or 5-2007 (72 FR 31159), as applicable; and 29 CFR part 1911.

### Source

Source: 55 FR 13696, Apr. 11, 1990, unless otherwise noted.

### Authority

Authority: 33 U.S.C. 941; 29 U.S.C. 653, 655, 657; Secretary of Labor's Order No. 12-71 (36 FR 8754); 8-76 (41 FR 25059), 9-83 (48 FR 35736), 1-90 (55 FR 9033), 6-96 (62 FR 111), 3-2000 (65 FR 50017), 5-2002 (67 FR 65008), 5-2007 (72 FR 31160), 4-2010 (75 FR 55355), 1-2012 (77 FR 3912), 08-2020 (85 FR 58393), or 07-2025 (90 FR 27878); 29 CFR part 1911; and 5 U.S.C. 553, as applicable.

### Source

Source: 39 FR 23502, June 27, 1974, unless otherwise noted.

### Source

Source: 39 FR 23502, June 27, 1974, unless otherwise noted. Redesignated at 40 FR 23072, May 28, 1975.

### Amendments

[55 FR 13696, Apr. 11, 1990, as amended at 61 FR 9240, Mar. 7, 1996; 72 FR 71070, Dec. 14, 2007]