Monday, September 6, 2010


PFD dan P&ID adalah bagian yang tak terpisahkan dalam terbentuknya suatu piping system karna induk dari semua itu adalh PFD dan P&ID..
Untuk PFD , biasanya yang membuat adalah Process Design Engineer sedangkan untuk P&ID yang membuat adalah Process Engineer tapi yang ikut andil besar adalah  Piping Design Engineer dan Control
System Design Engineer. Dimana mereka memberikan inputan-tambahan mengenai apa yang dibuat oleh
process engineer.

Dimana ini uraian ringkas mengenai PFD dan P&ID yang kami ambil dari dan dalam bahasa Inggris. Gunakan goggle terjemahan bilamana kurang paham.

The Process Flow Diagram - PFD, a schematic illustration of the system

A Process Flow Diagram - PFD - (or System Flow Diagram - SFD) shows the relationships between the major components in the system. PFD also tabulate process design values for the components in different operating modes, typical minimum, normal and maximum. A PFD does not show minor components, piping systems, piping ratings and designations.

A PFD should include:

• Process Piping

• Major equipment symbols, names and identification numbers

• Control, valves and valves that affect operation of the system

• Interconnection with other systems

• Major bypass and recirculation lines

• System ratings and operational values as minimum, normal and maximum flow, temperature and pressure

• Composition of fluids
System Flow Diagrams should not include:

• pipe class

• pipe line numbers

• minor bypass lines

• isolation and shutoff valves

• maintenance vents and drains

• relief and safety valve

• code class information

• seismic class information

P&ID  (PIPING & INSTRUMENT DIAGRAM)A Piping and Instrumentation Diagram - P&ID, is a schematic illustration of functional relationship of piping, instrumentation and system equipment components

P&ID shows all of piping including the physical sequence of branches, reducers, valves, equipment, instrumentation and control interlocks.

The P&ID are used to operate the process system.

A P&ID should include:

• Instrumentation and designations

• Mechanical equipment with names and numbers

• All valves and their identifications

• Process piping, sizes and identification

• Miscellaneous - vents, drains, special fittings, sampling lines, reducers, increasers and swagers

• Permanent start-up and flush lines

• Flow directions

• Interconnections references

• Control inputs and outputs, interlocks

• Interfaces for class changes

• Seismic category

• Quality level

• Annunciation inputs

• Computer control system input

• Vendor and contractor interfaces

• Identification of components and subsystems delivered by others

• Intended physical sequence of the equipment

This figure depict a very small and simplified P&ID:

A P&ID should not include:

• Instrument root valves

• control relays

• manual switches

• equipment rating or capacity

• primary instrument tubing and valves

• pressure temperature and flow data

• elbow, tees and similar standard fittings

• extensive explanatory notes

Demikianlah dari saya dan semoga bermanfaat buat teman-teman semua.


  1. Thanks for the info! I have also found a great P&ID Tutorial (Piping and Instrumentation Diagram) using Lucidchart and it is very easy to use! Check it out!