1 What is Plot Plan?
> Is a drawing which express complete configuration of unit or plant by showing equipment layout & structure planning.
> Is one of the most important basic design documents for detail design engineering.
2 What is the “Function of Plot Plan?
2.1 Piping Design
2.2 Civil Engineering
2.3 Electrical Engineering
2.4 Instrument Engineering
2.5 Process/ System Engineering
2.6 Scheduling
2.7 Construction
2.8 Client
3 Functions of Plot Plan:
3.1 Piping Design:
> To produce equipment arrangement studies that facilitate the interconnection of above & underground process/ utility piping.
> To estimate piping material quantity
3.2 Civil Engineering:
> To develop grading & drainage plan, holding ponds, diked areas, foundation & structural design & material estimate.
3.3 Electrical Engineering:
> To produce area classification drawings, locate switchgear; substation & motor control center; cable route & material estimate.
3.4 Instrument Engineering:
> To locate analyzer houses & cable trays, assist in the location of main control house & material estimate.
3.5 Process/ System Engineering:
> To facilitate hydraulic design, line sizing & utility block flow diagram.
3.6 Estimations:
> To estimate the overall cost of the plant.
3.7 Construction:
> To schedule the erection sequence of all plant equipment, rigging studies for large lift, constructability review, marshaling, & lay down areas throughout the entire construction phase.
3.8 Client:
> To safety, operator & maintenance reviews & develop as-built record of plant arrangement.
4 “Required Document/ Data” for Plot Planning:
4.1 Space of Unit Area
4.2 Process Flow Diagram (PFD)
4.3 Utility Flow Diagram (UFD)
4.4 Proposal Plot Plan (from ITB Document)
4.5 Skeleton drawing of equipment showing dimension & configuration
4.6 Data Sheet of H/E, Tank, etc.
4.7 Applicable Code & Standard (Local & Int’l)
4.8 Applicable Laws & Regulations
4.9 Basic Engineering Design Data (BEDD)
5 Steps of Preparation of plot Plan:
5.1 Preparation of Preliminary Plot Plan
> Preliminary equipment layout or arrangement
> Preliminary arrangement of structures, building & other facilities
5.2 Study on Preliminary Plot Plan
> Study on safety instances
> Study on pipe rack width
> Study on routing for main piping & cables
> Study on construction & maintainability
> Study on operation accessibility & operability
> Study on underground obstruction
5.3 Completion of Plot Plan
> Determination of dimension between equipment, structures and etc.
> Modification as a result of piping layout
6 Basic Consideration of Plot Planning:
6.1 General
a. Construction & Maintenance
b. Access & Ease Operation
c. Safety & Prevention of the Spread of Fire
d. Economical Design & Future Expansion
6.2 Blocking
The plant site shall be formed by block in consideration of hazard attendant to plant operation.
a. Process Area
b. Storage Area
c. Utilities Area
d. Administrative & Service Area
e. Other Areas such as:
> Loading & unloading area
> Flare & burnt pit area
> Waste water treatment area or effluent treatment area
6.3 Terrain & Weather
a. Terrain
> Contour
> Land Profile
> Area Physical Character
b. Weather: Climatic condition such as:
> Stormy weather
> Seasons
> Seismic condition
6.4 Prevailing Wind
Some equipment/ Facilities shall be laid/ mounted on the following wind direction:
a. Windward direction
b. Upwind direction
6.5 Classification of Hazard
The plant layout shall be determined in consideration of classified hazardous area:
a. Classification of location for Electrical Installation in Petroleum Refineries API-RP-500A
b. Area Classification
6.6 Maintenance Space
> Sufficient space shall be provided of maintenance of the facilities.
6.7 Future Expansion
> Shall take into consideration for future expansion.
