Twenty-five states, Puerto Rico and the Virgin Islands have OSHA-approved State Plans and have adopted their own standards and enforcement policies. For the most part, these states adopt standards that are identical to Federal OSHA. However, some states have adopted different standards applicable to this topic or may have different enforcement policies.
This section highlights OSHA standards, directives (instructions for compliance officers), standard interpretations (official letters of interpretation of the standards), and national consensus standards related to the permit- and non-permit-required confined spaces in the petrochemical industry.
Frequently Cited Standards
OSHA maintains a listing of the most frequently cited standards for specified 6-digit North American Industry Classification System (NAICS) codes. Please refer to OSHA’s Frequently Cited OSHA Standards page for additional information. For Drilling Oil and Gas Wells and Support Activities for Oil and Gas Operations, use NAICS code 213111 and 213112 in the NAICS search box.
General Industry (29 CFR 1910)
Construction Industry (29 CFR 1926)
Note: These are NOT OSHA regulations. However, they do provide guidance from their originating organizations related to worker protection.
American National Standards Institute (ANSI)/American Society of Safety Engineers (ASSE)
American Petroleum Institute (API)
API develops standards that identify and support proven, sound engineering and operating practices, and safe, interchangeable equipment and materials, for use in the petroleum industry. API is an accredited Standards Developing Organization that meets the due process requirements of the American National Standards Institute (ANSI).
National Fire Protection Association
Steel Tank Institute
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