DISCIPLINE COORDINATION

The final design of a pump station represents the contributions from multiple disciplines. Each discipline’s contribution must not only be functional, but must interface with all other disciplines. As a result, no discipline can work in isolation. Coordination between disciplines throughout the design process is essential in developing a high quality product. The design engineer must actively engage in inter-discipline coordination. The following provides a brief discussion of the coordination points between the mechanical design engineer, and other disciplines. The following is not a complete list of coordination points, but is a starting point to initiate further discussions.

7.1. Instrumentation and Controls

The P&IDs represent a graphical summary of the design of the station and the method in which it is controlled. As the design progresses subtle changes in the mechanical drawing might not be picked up in the P&IDs. These drawings must be checked for consistency with the mechanical drawings. The following identifies a brief list of coordination points between I&C and mechanical.

 Check P&IDs for physical agreement with mechanical layout for piping, piping sizes and any materials or process call outs.

 Verify all valves in mechanical drawings are also shown in the P&IDs including drain valves and air release valves. The design engineer shall verify the size and tag numbers associated with each valve.

 Verify control strategy for the equipment is consistent with mechanical approach.

 Verify monitoring instrumentation associated with the equipment are shown on the P&IDs (for vibration monitor or temperature monitoring).

 Safety showers

7.2. Electrical

During the progression of the design, it is possible the mechanical equipment may change. The new mechanical equipment may have a different requirement with regards to power. The design engineer shall verify that the power requirements of each piece of equipment agree with the power supply indicated in the electrical drawings. The following identifies a brief list of coordination points between electrical and mechanical.

 Verify equipment voltage requirements and RPM requirements for the pumps

 Verify equipment power and amperage

 Verify any motor references in the equipment specifications are in agreement with the electrical specifications.

 Verify electrical has accounted for any piping that requires heat tracing.

 Verify electrical has provided power connections to solenoid valves, temperature and vibrations switches.

 Electrical cable routing.

 Electric unit heaters.

 Wiring for safety shower alarms.

 Lighting requirements

7.3. Structural

The design engineer must also coordinate with the structural group regarding the pump station design.

The mechanical design engineer is primarily concerned with the interface points between the equipment and the building structure. The following identifies a brief list of coordination points between structural and mechanical.

 Confirm clearances between the bridge cranes and supporting structures

 Verify wall penetrations do not occur at wall joints

 If wall penetrations are close to corners or floors, verify adequate clearance for a wall sleeve or link seal.

 Verify equipment pad dimensions comply with mechanical equipment cut sheets

 When dealing with vertical turbines, confirm the actual weight of the equipment was provided to the structural group.

 Pipe supports and piping loads.

7.4. Civil

As can be expected, there may be overlap between the civil and mechanical design engineer’s scope of work. The following identifies a brief list of coordination points between civil and mechanical

 Verify pipe invert elevations and sizes at interface between mechanical and civil drawings.

 Verify if double couplings are provided to take up differential settlement between the building and yard piping.

 Verify any yard piping upstream or downstream of the pump agree with hydraulic calculations performed previously.

 Verify the 100 year flood plain elevation. Use the Federal Emergency Management Agency (FEMA) guidelines.

7.5. HVAC and Plumbing

The design engineer must also coordinate with the HVAC group regarding the pump station design. The mechanical design engineer is primarily concerned with the proper HVAC system(s) for the pump station and any other areas related to the Pump station. The following identifies a brief list of coordination points between HVAC and mechanical.

 Verify proper ventilation is provided, based on area classification and heat generated by pumps.

 Verify with owner the desired room temperatures for the pump station and any other areas related to the pump station, and relate the information to HVAC engineer.

 Verify proper heating system is provided to prevent freezing

 Verify floor drains, sinks and hose bibs are coordinated with HVAC engineer

 Coordinate Fire protection requirements with HVAC engineer.

7.6. Architectural

There are a few coordination points between mechanical and architectural.

 Confirm clearances between the bridge cranes and supporting structures

 Confirm ton capacity of bridge crane for architectural signage

 Confirm size of pumps for roof/floor hatch access openings if needed

 Confirm maintenance and access walking clearance around all mechanical equipment is a minimum of

3’-0”

 Coordinate location of sump pump, trench, and access to below if needed. Ladders, grating, etc. Do not place near or in front of any doors or required egress paths

 Coordinate any wall penetrations of pipe or above grade penetrations

 Coordinate height of overhead coiling door, if needed, for truck/equipment clearances, etc.