What factors influence plot plan layout in process design?

Plot plan factors: Safety spacing - API 2510 and company standards for distances between hazardous equipment. Fire protection - access for firefighting, firebreaks. Process flow - minimize long pipe runs, logical equipment arrangement. Operability - access for operation, sample points, instrumentation. Maintenance - crane access, tube pull space, valve access. Expansion - space for future additions. Environmental - emissions control, drainage, containment. Prevailing wind - locate hazardous areas downwind of control room and occupied buildings. Utilities - efficient routing of power, steam, cooling water. Constructability - modular fabrication, heavy lift requirements. Area classification - electrical hazardous area zones. Typical arrangement: process units in center, tanks on periphery, control room upwind, flare remote.