An LNG Plant Logic schedule into an EPC n8n model

This Logic schedule diagram it is a full LNG Train execution logic. From the diagram, the complete content includes:

🔹 Process & Mechanical Systems

• AGRU, Dehydration, MR Compressors, PR Compressors, Air Coolers, Heaters
• MCHE, Process vessels & exchangers, Flare system, Pipe racks (MR / PR)

🔹 Piping

• Underground piping, Aboveground piping, Pipe fabrication (70% / 100%)
• Pipe erection (50% / 100%), Pipe testing, Insulation / painting / foam, Alignment

🔹 Electrical

• Underground electrical, Aboveground electrical, Power & Light
• Temporary power, GTGs, Substations, Energization

🔹 Instrumentation & Control

• Underground E&I, Aboveground E&I, Instrument air / N₂ / utilities, DCS panels
• Loop checks, Anti-surge control, Compressor controls

🔹 Civil / Structural

• Piperack foundations, Equipment foundations, Misc foundations & paving
• Structural steel (pipe rack), Buildings (control room, substations)

🔹 Utilities

• Air, Water, Nitrogen, Sewage treatment plant, Fire protection

🔹 LNG Tanks

• Foundations, Construction, Cooldown, Fill

🔹 Jetty / Marine

• Piles & trestle, Structural push, Piping, Loading arms, Commissioning

🔹 Commissioning & Start-up

• Degreasing AGRU, DEA charge, Temporary fuel gas, Dryer loading / regeneration
• Propane & ethylene loading, Full ESD. Cooldown, First cargo

Now, we are going to translate it into a system-engineering-grade workflow suitable for:

🔹 n8n (execution + automation)

🔹 CPM engines (ES / EF / LS / LF / Float)

🔹 Primavera-style EPC logic (ENG → PROC → CONST → COMM

We start with a macro backbone, a full EPC logic encoding which conceptually has 8 EPC phases

• Phase 0 – Site Readiness
• Phase 1 – Engineering
• Phase 2 – Procurement
• Phase 3 – Civil & Foundations
• Phase 4 – Structural & Buildings
• Phase 5 – Mechanical & Piping
• Phase 6 – E&I Installation
• Phase 7 – Pre-Commissioning
• Phase 8 – Commissioning & Start-up

Then to translate this into an EPC n8n model, we have two options:

🔹 Option A — Full correct EPC logic model

A workflow with:

• 8 explicit phase nodes
• Parallel ENG / PROC / CONST branches
• Proper gate milestones
• Overlaps exactly as per logic diagram
• Month-based timing on every node
• Import-safe n8n structure
• CPM-ready attributes

This approach is usable for: CPM math, React Flow visualization, Primavera-style logic, Real progress ingestion

Result: Phase + Discipline (Level-3)

🔹 Option B — Split by discipline

• One workflow per discipline (ENG / PROC / CONST / COMM)
• One master workflow to orchestrate them

Expanding the workflow to Level-4 (Execution Systems)

• AGRU
• Dehydration
• MR Compressors
• PR Compressors
• Air Coolers
• Underground Piping
• Underground E&I
• Aboveground Piping
• Aboveground E&I
• Power & Light
• Temporary Power
• GTGs & Substations
• Piperack Steel
• Buildings
• Utilities (Air / N₂ / Water / STP)
• Fire Protection
• Jetty Systems
• Tanks

Now we have:

• Single master EPC workflow
• Level-4 systems correctly embedded
• CPM-correct logic
• React Flow–ready DAG
• n8n orchestration without duplication

It is a Level-4 complete model which can be used for:

CPM math, Critical Path identification, React Flow visualization, n8n execution logic

Expanding the workflow to Level-5 (Activities)

• Foundations
• Steel
• Equipment
• Piping
• Testing
• Commissioning