Petrochemicals & Heavy IndustrySilver report
Published April 2026Insight Research8 min read2026 Edition10 sources, 8 primary-gradeStrong source depth

Thai Petrochemicals: PTT Global Chemical, IRPC, and the Map Ta Phut Industrial Concentration

Thai petrochemical industry is structurally concentrated at Map Ta Phut (Rayong) industrial estate β€” PTT Global Chemical (PTTGC SET-listed) ~50% capacity, IRPC (SET-listed) ~25%, SCG Chemicals (SCC subsidiary) ~20%. ~USD 30-40B Thai petrochemical industry. Watchpoints: 2024-2025 oil-price cyclicality, EU CSDDD, IMO 2030 emissions, China overcapacity, Indorama Ventures upstream-integration.

Key takeaways

  1. 1

    Thai petrochemical industry concentrated at Map Ta Phut Rayong industrial estate.

  2. 2

    PTTGC ~ capacity (PTT Plc-affiliated).

  3. 3

    IRPC ~; SCG Chemicals ~; Indorama Ventures upstream-integration.

  4. 4

    ~ Thai petrochemical industry.

  5. 5

    Map Ta Phut IEAT-administered cluster anchor.

  6. 6

    Watchpoints: oil-price cyclicality, EU CSDDD, IMO 2030, China overcapacity.

Questions this report answers

Who's the petrochemical-tier concentration? Per SET disclosures: PTT Global Chemical (PTTGC SET-listed, PTT Plc ~ parent) ~ capacity, IRPC (SET-listed PTT-affiliated tier-2) ~, SCG Chemicals (SCG SCC subsidiary) ~, Indorama Ventures (IVL SET-listed Lohia-family global PET tier-1) significant upstream-integration. ~ industry.[, , ]

What's the cluster, product structure? Per Map Ta Phut IEAT: Map Ta Phut Industrial Estate (Rayong) IEAT-administered structural cluster anchor. Product mix: olefins (ethylene, propylene), aromatics (BTX), polyethylene, polypropylene, PTA-PET (Indorama Ventures global), PVC, polystyrene. Markets: domestic ~, ASEAN-export ~, Asia-export ~, ROW ~.[]

What are the watchpoints? Per Bangkok Post and trade coverage: 2024-2025 oil-price cyclicality (Brent-WTI volatility), EU CSDDD compliance, IMO 2030 emissions standards, China overcapacity (depressed Asian margins 2023-2025), Indorama Ventures upstream-integration acquisition trajectory, EEC petrochemical-industry investment cadence.[]

Public-record references
Data as of: 2025-2030 horizon

Executive summary

Thai petrochemical industry concentrated at Map Ta Phut. PTTGC ~, IRPC ~, SCG Chemicals ~, Indorama Ventures upstream-integration. ~ industry.[, ]

Map Ta Phut IEAT-administered cluster anchor. Product mix olefins, aromatics, polyethylene, polypropylene, PET, PVC.[]

Watchpoints: oil-price cyclicality, EU CSDDD, IMO 2030, China overcapacity 2023-2025, EEC investment cadence.[]

Public-record references
Data as of: 2025-2030 horizon

Thai petrochemical industry structure

PTTGC capacity

Value

~50%

Notes

PTT Plc-affiliated tier-1.

IRPC capacity

Value

~25%

Notes

PTT-affiliated tier-2.

SCG Chemicals

Value

~20%

Notes

SCG SCC subsidiary.

Indorama Ventures

Value

Global PET tier-1

Notes

SET-listed Lohia-family.

Total industry

Value

~USD 30-40B

Notes

Annual Thai petrochemical.

Cluster anchor

Value

Map Ta Phut Rayong

Notes

IEAT-administered.

Public-record references
Data as of: 2024-2026

Analyst framing

Why this report matters

Thai petrochemical industry concentrated at Map Ta Phut. PTTGC ~50%, IRPC ~25%, SCG Chemicals ~20%, Indorama Ventures upstream-integration. ~USD 30-40B industry. Watchpoints: oil-price cyclicality, EU CSDDD, IMO 2030, China overcapacity.

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Thai Petrochemicals: PTT Global Chemical, IRPC, and the Map Ta Phut Industrial Concentration Β· Insight