The Edible Oil Supply Chain: From Thai Refinery to Your Port — What to Expect

Understanding what happens between placing your purchase order and receiving your edible oil at destination port is not just background knowledge — it is operational intelligence that helps you plan cash flow, anticipate documentation timelines, manage quality risk, and respond to the inevitable occasional disruption without panic.

This guide maps the complete journey of a bulk edible oil shipment from a Thai refinery to a destination port, covering each stage's timeline, the quality risks it introduces, and what a competent Thai exporter should be managing at each step.

Stage 1: Production and Refinery Quality Release (Days 1–7)

What Happens

Edible oil is produced at oil refineries located primarily in:

• Central Thailand (Samut Sakhon, Nakhon Pathom, Chonburi): Palm olein, soybean oil refining from imported crude
• Eastern seaboard (Rayong, Chonburi): Petrochemical zone adjacent refineries with vegetable oil capacity
• Laem Chabang industrial zone: Refinery/packaging operations adjacent to the export port

The refinery's QC department tests each production batch before release:

• FFA, peroxide value, moisture, color, iodine value
• Halal/kosher compliance check against certification scope
• Microbiological check (for coconut oil and sensitive products)
• Batch release documentation signed by QC manager

Timeline: Production to QC release: 1–3 days for standard grades.

Stage 2: Transfer to Bulk Storage / Pre-Loading Tank Farm (Days 2–10)

What Happens

After QC release, oil is transferred from refinery production tanks to:

• Export tank farm: Large storage tanks (500,000–2,000,000L capacity) at or near the export port, managed by the refinery or logistics company
• Intermediate warehouse: For smaller quantities, oil is filled into drums, IBCs, or flexitanks directly at the refinery

For flexitank shipments, the filling operation occurs at a designated port-area warehouse:

• Empty flexitanks are installed in containers
• Oil is pumped from refinery tank to flexitank at controlled temperature
• Container doors are sealed immediately after filling

Quality Risks at This Stage

• Tank contamination: Storage tanks must be clean and dedicated to edible oil. Cross-contamination from previous product (especially mineral oils or chemicals) is a catastrophic quality failure that should be prevented by dedicated tank management.
• Temperature management for palm olein: At ambient temperatures below 15°C, palm olein can solidify in storage tanks and pipelines. Thai refineries manage this with heated tanks and insulated pipelines, but buyers should confirm for winter shipments.
• Time in storage: Extended storage (> 30 days post-production) allows FFA and PV to increase incrementally. For premium oil quality, minimize tank time between production and shipment.

Stage 3: Pre-Shipment SGS Inspection (Days 3–12)

What Happens

The SGS or Bureau Veritas inspector visits the refinery or tank farm and draws samples:

1. Tank sampling: Samples drawn from top, middle, and bottom of the tank (or multiple tanks if oil from multiple tanks is blended for the shipment)
2. Composite sample: Portions from different depths/tanks combined in fixed proportions to create a representative composite
3. Sealed sample: Composite sample sealed in a labeled container; one portion retained by SGS; one portion provided to the exporter
4. Quantity measurement: Tank gauge readings (ullage survey) to determine volume; converted to weight using density at measured temperature
5. Documentation: SGS inspection certificate issued, typically within 2–3 business days of sampling

What the SGS Certificate Covers

For edible oil, a comprehensive SGS scope should include:

• Quantity (liters or MT)
• FFA, peroxide value, M&I
• Color (Lovibond)
• Iodine value
• Confirmation of packaging integrity (for drums/IBCs: no leakage, correct labels)

Stage 4: Container Loading / Vessel Booking (Days 5–15)

For Flexitank Shipments

• Containers arrive at the filling warehouse
• Pre-loading container inspection (cleanliness, no previous cargo contamination)
• Flexitank installation and inflation test
• Oil filling via pump and hose (filling time 45–90 minutes per container)
• Container doors sealed; desiccant strips installed if recommended for route
• Container seal applied; container number recorded against SGS documentation
• Containers transported to port

For Drum / IBC Shipments

• Drums/IBCs filled at refinery or packaging facility
• Quality check on each unit (no leakage, correct fill volume)
• Pallet stacking, stretch-wrap
• Container loading: 80 × 200L drums or 4 × 1,000L IBCs per 20-ft container
• Container sealing and seal number recorded

Vessel Booking

• Exporter (or freight forwarder) books space on the next available sailing for the destination
• Booking cut-off is typically 5–7 days before vessel departure
• Bill of Lading issued by the shipping line after vessel departure

Key timing note: The gap between SGS inspection and vessel departure is ideally < 7 days. If oil sits in a container at port for >10 days before loading, peroxide value can increase in warm ambient conditions. Ensure the contract specifies maximum delay between container sealing and vessel departure if quality sensitivity is high.

Stage 5: Ocean Transit (Days 14–30 depending on route)

Transit Times from Laem Chabang

Quality During Transit

Key concerns for oil quality during transit:

• Temperature extremes: Palm olein containers transiting through cold-climate ports (Europe, North America in winter) may experience partial solidification — not a quality defect, but requires heated unloading equipment or ambient warming time at destination
• Container condensation: Less severe for oil than for hygroscopic products (rice, sugar) because oil does not absorb moisture. However, condensation water can pool inside a drum or IBC container if seal integrity is compromised
• Leakage risk (drums/IBCs): Drum closure integrity should be verified at loading; a leaking drum contaminates all drums in the container and creates Dangerous Goods reporting obligations at destination port

Stage 6: Destination Port Arrival and Customs Clearance (Days 2–10 at destination)

Typical Port Processes

1. Vessel arrival notification: Shipping line notifies consignee and customs
2. Release of shipping documents: Bill of Lading, commercial invoice, packing list, COO submitted to customs
3. SGS/other inspection on arrival (if required by buyer or destination country): Some importers run an arrival survey for insurance purposes or as a receiving quality check
4. Customs classification and duty payment: Based on HS code and origin
5. Container release: Container released from port on payment of port charges and customs clearance
6. Delivery: Container delivered to buyer's warehouse for unloading

Common delays at destination:

• Missing or non-compliant documentation (most common cause)
• Health certificate or Halal certificate issues
• Destination country pre-import approval outstanding (e.g., Indonesia BPOM)
• Port congestion (particularly Lagos and Mombasa periodically)

How MC International Manages Your Supply Chain

MC International S.P.A Co., Ltd manages the complete Thailand-to-destination supply chain for edible oil buyers, including:

• Refinery quality release coordination
• SGS inspection scheduling and reporting
• Container stuffing supervision
• Vessel booking via established carrier relationships
• Complete documentation package delivery (pre-vessel departure for buyer pre-approval)
• Halal/kosher certificate provision where applicable

We provide shipment tracking updates at each major stage and a single point of contact for documentation queries and timeline management.

Learn More About Your Next Oil Shipment

Contact our edible oil logistics team for a timeline and documentation overview for your destination market.

Email: sales@mcispcoltd.com

WhatsApp: +66 99 437 2193

MC International S.P.A Co., Ltd — SGS Inspected | ISO 9001 | HACCP | Halal | End-to-End Oil Supply Chain | 10+ Years | Thailand