Table below provides a comprehensive checklist for layout of pumps, compressors and air coolers.

Sr.No Check Description
1 Pumps
1.01 Located above grade level and in open area.
1.02 Located close to the suction source and the location meet NPSH requirements.
1.03 Suction and discharge are located close to and facing the suction source.
1.04 Driver axes are oriented perpendicular to the piperack or equipment. (This minimizes fire exposure in the event of a pump seal failure).
1.05 High pressure pumps are separated from other pumps and process equipment.
1.06 Pumps handling inflammable liquids are not located directly below pipe racks and/or process equipments.
1.07 Pump drivers are lined facing the maintenance aisles to facilitate access to motor for maintenance and withdrawal.
1.08 The space around the pumps are sufficient for removal and installation of casing sections, motors, and internal elements. Maintenance clearances around the pumps conform to vendor requirements. 
1.09 The space requirements for seal oil tanks are considered.
1.10 Preferred nozzle orientation and NPSH available are agreed with Rotating Equipment Engineer.
1.11 Suction and discharge piping are routed so as not to obstruct the handling of the pump for maintenance. (Suction and discharge piping should not cross the pump or motor from above).
1.12 Large pumps are provided with shelter and lifting facilities
1.13 Pumps located in common shelter are provided with adequate ventilation.
1.14 Pumps are accessible by forklift or mobile crane from piperack maintenance corridor.
1.15 If pumps are not accessible by cranes, trolley beams or other means of mechanical handling are provided for removal and installation.
2 Gas Compressors
2.01 Gas Compressors and associated facilities are located in open air or adequately ventilated shelter.
2.02 Access for fire fighting is available from two sides.
2.03 Access for maintenance is available for mobile handling equipment such as cranes when located in open air or access is available for truck when located in shelter.
2.04 Maintenance laydown area is sized for the largest component to be handled.
2.05 If maintenance laydown area is on the operating deck level, the area is structurally designed for the heaviest item that will be placed on the laydown area.
2.06 Maintenance envelope is checked to ensure that the largest sized component can be removed safely.
2.07 Compressors with horizontal split casing and top piping connections should be provided with break flanges in the piping to facilitate removal of the top half of casing.
2.08 Preferably grouped together within a common shelter
2.09 Adequate instrument/valve access around the Compressor
2.10 Space requirement for Lube Oil Console
2.11 Inlet Knockout Drums are located close to Compressor
3 Gas Air Coolers
3.01 Air Coolers are grouped together with a common elevation.
3.02 Air Coolers of different air intake elevations are not located adjacent to each other to avoid hot air recirculation.
3.03 Pumps and equipment handling flammable products, electrical switchgear and control rooms are not located directly below the air coolers.
3.04 Cooler elevations are set higher than any adjacent elevated access platforms to avoid dispersion of hot air towards the operating areas.
3.05 Valves and flanged connections below the coolers are minimised.
3.06 Coolers are located away from gas compressors and fired heaters.
3.07 Fan inlet of forced draft cooler and underside of the bundle of induced draft cooler is at least one fan diameter above the nearest solid horizontal obstruction of air flow.
3.08 Coolers are at least 2.4m above piperack with sufficient headroom to maintain the motors and fans for forced fraft coolers.
3.09 Induced draft coolers are located upwind of forced draft coolers.
3.10 Coolers are located downwind of operating areas to disperse hot air away from these areas.
3.11 Cooler supports match the piperack column to optimize structural arrangement.
3.12 Symmetrical and cascade piping arrangements are considered
3.13 Maintenance access to fans and motors are considered.
3.14 Crane access for maintenance of tubes and for change out of entire tube bundles are considered.