API RP 753-2007 pdf free download

API RP 753-2007 pdf free download.Management of Hazards Associated with Location of Process Plant Portable Buildings.
2 Management of Personnel in Portable Buildings The following questions should be addressed when considering placement of a portable building near a covered process area: • Do personnel need to be located near a covered process area? • Do personnel need to occupy a portable building? • Can the portable building be placed further from the covered process area, while allowing the occupants to effectively per- form their tasks? The following sections provide guidance in addressing the above questions. 2.1 ESSENTIAL PERSONNEL AND USE OF PORTABLE BUILDINGS Owners and/or operators shall determine if essential personnel need to occupy a portable building. Portable buildings that house personnel who are not essential shall be located as far as reasonably practicable from a covered process area consistent with the guiding principles listed in Section 1.3 and the guidance in Sections 3, 4, and 5. Personnel occupying portable buildings shall be informed of the following: • The facility’s portable building policies or procedures; • The emergency response plan for the portable building in the event of an explosion, fire, or toxic release incident; and • Other work activities in the vicinity that could create an explosion, fire or toxic hazard to the portable building occupants. 2.2 PORTABLE BUILDINGS INTENDED FOR OCCUPANCY Portable buildings that are intended to be occupied shall be evaluated for siting relative to explosion, fire, and toxic release haz- ards in accordance with Sections 3, 4 and 5. Occupancy threshold examples in API RP 752 Sections 2.5.2 b, c, and d shall not be used to exclude portable buildings from a sit- ing evaluation.
2.3 PORTABLE BUILDINGS NOT INTENDED FOR OCCUPANCY Portable buildings not intended for occupancy do not need to be sited for explosion, fire, or toxic release hazards. Controls should be implemented to ensure that the use of these portable buildings does not change to “portable buildings intended for occupancy”. Personnel, however, may periodically be present in these portable buildings to perform their duties. The following examples are portable buildings and structures that are generally not intended for occupancy: • Tool trailers or storage sheds without attendant stationed inside • Decontamination facilities • Control equipment enclosures • Analyzer sheds • Portable electrical substations • Portable electric generators 2.4 OTHER OCCUPIED PORTABLE STRUCTURES This section addresses a group of portable structures that are used to support temporary work activities within covered process areas and are often mandated by regulatory requirements. Current technology is typically not sufficient to provide the capability to remotely perform these activities. The siting evaluation described in this document does not apply to these structures. Examples include: • Mobile environmental monitoring stations • Supplied air trailers • Inert entry life support trailers • Vehicles housing equipment stations (e. g., trucks or vans with X-ray equipment) Special characteristics of these structures include: • Required to be located inside or near the process unit. (For example, due to physical connections between equipment in the portable building and the unit equipment) • Support essential activities to ensure personnel safety, necessary maintenance or environmental monitoring and testing • Present only for the duration of the specific activity and removed immediately thereafter • Maneuverable for placement in congested areas for access to nested equipment and stacks• Accommodate low numbers of personnel Risk mitigation measures for these structures shall include: • Direct communications of occupants with operations • Authorized work permit for their temporary presence • Awareness training of process unit hazards for occupants • Emergency response and evacuation procedures • Minimized occupancy, which includes controls to confirm that personnel not directly involved in a critical ongoing activity (e. g., start-up and planned shut-down) are evacuated from these portable structures This recommended practice does not apply to portable structures that are not buildings. Examples include: • Welding enclosures • Asbestos or refractory remediation enclosures • Cranes or other equipment with operator cabins