PFS & P&ID Flashcards
Objective
PPMS
- To ensure that the projects embarked by all project teams are
viable, technically applicable and good return. - To ensure project are smoothly implemented, cost effective and
in accordance to good governance practices. - To ensure that project practices especially Front End Loading
(FEL) are consistent. - Deliverance of projects are as per plan and business
requirement.
Definition
Process Flow Scheme (PFS)
A schematic drawing of a process or utility unit showing all relevant
physical and other process data, the main utility characteristics, the basic
process control elements and the main dimensions of the process
equipment
PFS serves as a basis for
Project Definition:
– The technical Basis for Design
– Preliminary Equipment List
– Preliminary Layouts
– Initial views on Utility/Resources Consumption
The PFS serves as a basis for
Project Planning:
– Strategic Planning
– Ordering of Special/Long Lead Items
– Project Scheduling
– Preliminary Costing (25-40% accuracy)
– Initial Risk Assessment
– Development of PEFS and other drawings
Info on
PFS/UFS
It shows what is happening in the Process rather than how it is achieved
PFS/UFS
describes
– Process Method
– Main Process Lines/connections
– Process Conditions and Physical Data based on Operating Conditions
– Mass Balance
– Main Process Equipment (and may give limited Design Data)
– It may show the Main Control Systems (Not Safeguarding)
Process Safeguarding Flow
Scheme (PSFS)
PFSs for pressure relief systems shall indicate relief quantities, physical characteristics and conditions for each relief valve and depressuring valve for each individual and general emergency case
Typical Equipment Short Specification
C
Columns
Typical Equipment Short Specification
E
Heat transfer equipment (unfired)
Typical Equipment Short Specification
V
Vessels
Typical Equipment Short Specification
R
Reactors
Typical Equipment Short Specification
F
Heat transfer equipment (fired)
Typical Equipment Short Specification
M
Mixers
Typical Equipment Short Specification
S
Separators
Typical Equipment Short Specification
A
Packaged Units and miscellaneous equipment
Typical Equipment Short Specification
P
Pumps
Typical Equipment Short Specification
K
Compressors and blowers
Typical Equipment Short Specification
T
Tanks
Typical Equipment Short Specification
V
Vessels
Process Engineering Flow Scheme (PEFS)
A pictorial representation of a process or utility unit which shows all the equipment, including installed spares and the associated piping and piping components, instrumentation, heat tracing and insulation
PEFS serves as a basis for:
Engineering Definition
ˉ Detailed calculations and equipment sizing
ˉ Equipment Data Sheets
ˉ Piping and instrumentation sheets
ˉ Final Plant Layout/Area Classifications
PEFS serves as a basis for:
Project Planning/Execution:
ˉ Detailed/ Final Planning/Scheduling
ˉ Determination of Final Project Cost Estimate (10-15% accuracy)
ˉ Defines Material Requirements/Take Offs (Bulks/Equipment)
ˉ Basis for Procurement
ˉ Basis for CTR (Cost Time and Resources - plan) Preparation
ˉ Basis of Contract Specification
ˉ Basis for HSE studies (e.g. HAZOP) and operations review
PEFS serves as a basis for:
Construction/ commissioning:
ˉ Detailed/ Final Planning/Scheduling
ˉ Construction Schedules/Records (e.g. Weld Maps, Hydro test).
ˉ Precommissioning & commissioning procedures).
ˉ As Built Record
PEFS serves as a basis for:
Operation & Maintenance
- It is very important that the PFS and PEFS will show a 100% reflection of
the as built situation. - It is of paramount importance to keep these documents up to date.
- This can be achieved with a rigid Plant Change procedure involving all
disciplines.
