Engineering DrawingsFoundational

Process Flow Diagrams (PFDs) for LNG Facilities

Learn to read an LNG process at system level by following major equipment, streams, operating conditions and material or energy flows on a PFD.

System context

Process engineering

Technical topic pages show the knowledge scope behind LNG University learning. Course, assessment and credential availability depends on the applicable program.

Relevant roles

Operators · Process engineers · Project engineers · Commissioning personnel

Prerequisites

LNG fundamentals

Knowledge level

Foundational technical coverage with system and operational context.

Learning outcomes

What this topic is intended to help you understand

Trace the major process route through an LNG facility.
Identify principal equipment and numbered process streams.
Use PFD information as a bridge to P&IDs, operating procedures and process studies.

Technical scope

Equipment, concepts and terminology

Equipment symbols
Process streams
Stream numbering
Temperature and pressure data
Material balance context
Utility interfaces
Process boundaries
Legend and notation

Operating context

How the topic connects to plant operation

Tracing startup and shutdown dependencies at high level
Locating upstream and downstream process relationships
Recognizing recycle and bypass paths

Safeguards and controls

Protection and risk-control context

PFDs do not replace detailed isolation or operating procedures
Use current controlled revisions for operational work

Technical learning does not replace site procedures, OEM documentation, engineering calculations, permits, supervision or facility-specific authorization.

Engineering documents

Documents commonly connected to this subject

Heat and material balance
P&ID
Equipment list
Process description