29 CFR § 1910.251 - Definitions.

---
identifier: "/us/cfr/t29/s1910.251"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "29 CFR § 1910.251 - Definitions."
title_number: 29
title_name: "Labor"
section_number: "1910.251"
section_name: "Definitions."
chapter_name: "OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
part_number: "1910"
part_name: "OCCUPATIONAL SAFETY AND HEALTH STANDARDS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
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."
regulatory_source: "39 FR 23502, June 27, 1974, unless otherwise noted."
cfr_part: "1910"
---


# 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) for definitions of listed and approved, and § 1910.7 for nationally recognized testing laboratory.

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