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API STD 2015 7th Edition, May 1, 2014
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Requirements for Safe Entry and Cleaning of Petroleum Storage Tanks
Additional Comments: K20157
Page Count:68
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General This standard is applicable to stationary atmospheric and low-pressure (up to and including 15 psig) aboveground petroleum storage tanks used in all sectors of the petroleum and petrochemical industry, including:

— crude oil and gas production,

— refining,

— petrochemicals,

— pipelines and terminals,

— bulk storage,

— ethanol facilities.

This standard provides requirements for safely planning, coordinating, and conducting tank entry and cleaning operations, from removal from service through return to service.

This standard does not and cannot cover every possible unique hazard or situation that may arise during tank cleaning operations. Site, product, and tank-specific hazards and situations must be addressed by employers using the appropriate principles and considerations provided for by this standard.

Non-applicability and Other Tank Cleaning Applications

This standard does not apply to the following types of tanks or vessels:

— pressure vessels and pressurized tanks exceeding 15 psig,

— cryogenic or refrigerated vessels or pressure tanks,

— vessels and tanks maintained under a vacuum,

— process vessels,

— underground storage tanks.

Although API Standard 2015 is not intended to cover these types of tanks and vessels, many of the safe tank cleaning and entry principles and requirements in this standard apply and should be considered.