Letters of Interpretation

OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed.

Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.

These letters of interpretation and the standards they address may not apply to OSHA State Plans. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or additional requirements. Please see OSHA-approved State Plans for more information.

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Date Title Standard Number
Clarification of OSHA's position on FR Clothing for welders. 1910.252, 1910.252(b)(3), 1910.132
Correct placement of air sampling cassettes on employees performing welding operations. 1910.252(c)
Citation policy regarding automatic sprinkler systems. 1910.252(a)(2)(vi)(B)
Training and competency for oxygen-fuel gas welding equipment use 1910.253(a)(4), 1910.252(a)(2)(xiii)(C)
Welder electrical safety training 1910.252, 1910.254, 1910.255
Introduction of electrical welding equipment into a non-permit confined space. 1910.146, 1910.252, 1910.252(a)(4)(i), 1910.252(b)(4)(i), 1910.252(b)(4)(vii), 1910.252(c)(4), 1910.252(c)(9), 1910.252(c)(10), 1910 Subpart Q
Permit-required confined spaces and control of hazardous energy; vehicle LOTO. 1910.146, 1910.147(a), 1910.147(c)(4)(i), 1910.252
Sampling for lead welding fumes. 1910.252(c), 1926.353
Enforcement of ventilation requirements for welding operations. 1910.252(c)
Conflict between requirements of 1910.252 and 1910.146 1910.252, 1910.146
Spray painting relating to vehicle maintenance operations. 1910.107, 1910.134, 1910.252, 1910.1000, 1910.1200, 1910.94
Interpretation of Standards. 1910.252
Evaluation of Bilsom "VISION" welding helmet in meeting OSHA standards. 1910.252(b)(2), 1910.252(b)(2)(ii)(I)
Wodelic Electronic Welding Helmet 1910.252
The Hornell Elektrooptick welding helmet appears to meet the intent of the OSHA standards. 1910.252
Cool-view welding helmets must meet Grade D breathing air requirements; Requirements for standard welding helmets. 1910.134(i)(1)(i), 1910.252(b)(2)(ii)
Valve protection for compressed gas cylinders 1910.252
Transparent Welding Curtains and the Requirements. 1910.252
Replacement tips for torches used in welding operations. 1910.252