API RP 2026-2017 pdf free download

API RP 2026-2017 pdf free download.Safe Access/Egress Involving Floating Roofs of Storage Tanks in Petroleum Service.
3 Terms, Definitions, Acronyms, and Abbreviations 3.1 Terms and Definitions For the purposes of this document, the following definitions apply. 3.1.1 air-supplied respiratory protection A respirator that provides a supply of safe breathing air from a tank (either a self-contained breathing apparatus portable tank or an air line supply tank) or from an uncontaminated fresh air supply source located outside of the work area. 3.1.2 cold work Work activity that does not produce heat, sparks, or other forms of energy sufficient to provide an ignition source if a vapor air mixture in the flammable range is present. Safe work or cold work is work that is not classified as hot work. 3.1.3 confined space Any tank or space that a) is large enough and so configured that a worker can bodily enter and perform assigned work, b) has limited or restricted means of entry or exit, and c) is not designed or intended for continuous occupancy by workers. 3.1.3.1 attendant A qualified employee stationed outside one or more permit-required confined spaces who monitors the entrants and who performs all attendant’s duties in accordance with the employer’s confined space program. 3.1.3.2 entrant A qualified person who is authorized by the entry supervisor to enter a confined space. 3.1.3.3 entry supervisor The qualified person designated by the employer (owner/operator or contractor) to be responsible for determining acceptable entry conditions at permit-required confined spaces and non-permit-required confined spaces. Entry supervisors shall authorize entry, oversee entry operations, and terminate entry as required by the permit or conditions. The duties of entry supervisor may be passed from one entry supervisor to another entry supervisor, during the course of an entry operation. NOTE An API-certified Tank Entry Supervisor (TES) is considered qualified to perform the duties of entry supervisor. 3.1.3.4 non-permit-required confined space A confined space (a space that meets all three of the confined space requirements) that has been checked, inspected, had its atmosphere monitored, and does not have (or does not have the potential to have) any of the characteristics required to be classified as a permit-required confined space. 3.1.3.5 permit-required confined space A tank or space that meets the confined space requirements and also has one or more of the following characteristics: a) contains or has the potential to contain a hazardous atmosphere, b) contains a material with the potential to engulf an entrant, c) has an internal configuration such that an entrant could become trapped or asphyxiated, d) contains any other recognized serious safety or health hazard(s), or e) has a floating roof not properly prepared and secured in accordance with API 2015. 3.1.3.6 permit-required confined space program The employer’s overall program for controlling and regulating entry into permit-required confined spaces and, where appropriate, protecting employees from permit space hazards. 3.1.4 entry The action by which an entrant passes through an opening into a confined space. Entry includes ensuing work activities in both permit-required confined spaces and non-permit-confined spaces and is considered to have occurred as soon as a part of the entrant’s body breaks the plane of an opening into the space. 3.1.5 flammable vapor limit The concentration of vapor in normal air that will ignite upon contact with a source of ignition.
3.1.5.2 upper explosive (flammable) limit UEL The maximum concentration (expressed as a volume percentage) of a vapor-in-air above which propagation of flame does not occur upon contact with an ignition source; generally considered “too rich to burn.” 3.1.6 floating roof, external A floating roof that is designed and constructed in accordance with the provisions of API 650, Annex C. An external floating roof is designed to be used on a tank with no fixed roof, but may be used on tanks with fixed roofs.