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.