---
title: "Full Guide to Thailand Plastic Granules Import Customs Declaration Process and Compliance Operation - Zhongshen Trading China"
description: "With the in-depth implementation of the RCEP policy in 2026，the demand for imported Thailand plastic granules continues to grow，while customs supervision over solid waste and 3C certification is becoming increasingly strict. Professional agency services can effectively solve compliance pain points by precisely controlling document review and commodity inspection processes. This article provides an in-depth analysis of the full-chain operations for Thailand plastic imports，and explains how to use..."
url: "https://www.sh-zhongshen.com/en/customs-declaration-knowledge/thailand-plastic-import-customs-process-guide.html"
language: "en"
type: "Article"
category: "Customs Declaration Basics"
datePublished: "2026-09-13"
dateModified: "2026-09-13"
brand: "Zhongshen Trading China"
image: "https://cndpic.sh-zhongshen.com/uploads/tradepics/LW6tWQ3rDvVQU.webp"
---

# Full Guide to Thailand Plastic Granules Import Customs Declaration Process and Compliance Operation

In the 2026 chemical raw material market,as an important plastic granule production base in Southeast Asia,Thailand maintains a steady growth in supply to the Chinese market.However,with the continuous tightening of domestic environmental regulations and intensified customs crackdown on "foreign garbage" smuggling,importing plastic granules from Thailand is not a simple trading transaction.While enjoying the advantage of low-cost supply from Southeast Asia,enterprises often face multiple challenges such as inconsistent documents,disputes over HS code classification,solid waste attribute identification,and 3C certification compliance.A slight mistake will not only lead to cargo detention at the port,resulting in high container detention fees and storage fees,but may also bring the risk of administrative penalties.

Zhongshen has been deeply engaged in the foreign trade import and export agency field for more than 20 years,and has accumulated rich practical experience in handling the import of complex chemical products and raw materials.For the segmented field of Thailand plastic imports,we not only provide basic logistics and transportation services,but also help enterprises sort out compliance paths from the source by building full-process,one-stop agency solutions.Whether it is a new enterprise new to plastic imports,or a senior buyer looking to optimize supply chain costs,Zhongshen can ensure that goods enter the domestic market safely and efficiently through professional customs declaration,inspection declaration,foreign exchange settlement and tax planning services.

![How to Quickly Resolve Document and Commodity Inspection Issues for Thailand Plastic Import](https://cndpic.sh-zhongshen.com/uploads/tradepics/LW6tWQ3rDvVQU.webp)

## In-depth Breakdown of the Full Process for Thailand Plastic Import

From delivery from Thailand factories to warehousing in domestic factories,the import of plastic granules involves multiple key links.We break down this process into three core stages: pre-shipment document review,port customs declaration,and commodity inspection and release.Each stage has its unique operation logic and compliance red lines.

### Pre-shipment Document Review and Compliance Confirmation

Before the cargo departs from the port,the accuracy of documents directly determines the smoothness of subsequent customs clearance.Zhongshen’s operation team will intervene before cargo shipment,and conduct strict review on the full set of documents provided by overseas suppliers.For goods of Thailand origin,the core lies in the standardization of the Certificate of Origin (Form E).Under the 2026 RCEP agreement,correct application and use of the Certificate of Origin can help enterprises enjoy preferential treatment of zero or low tariffs,but this requires that invoice information and packing list data be fully consistent with the certificate of origin.Any slight alteration or information deviation may lead to customs refusal of endorsement.

In addition,the composition report of plastic granules is also a key point of pre-review.We need to confirm key indicators such as the CAS number and ethylene monomer content of the goods to accurately declare the HS code.For recycled plastic granules,relevant test reports conforming to GB standards must be provided.Zhongshen will assist enterprises to identify potential risk points in documents in advance,such as the filling logic of the bill of lading consignee,the compliance of the wooden packaging fumigation certificate,etc.to avoid inspection and cargo detention caused by inconsistency between documents and goods.

### Port Customs Declaration and Price Negotiation

After the goods arrive at the destination port,the customs declaration process is the core of customs supervision.The customs system will conduct risk control on import declaration data.For bulk commodities such as plastic granules,price review and classification review are the key points.Zhongshen has a professional customs declaration team,who are familiar with the customs classification rules for different plastic materials such as polyethylene (PE),polypropylene (PP),polyvinyl chloride (PVC),etc.We can provide reasonable classification suggestions based on the actual physical form and chemical composition of the goods,to prevent document rejection or amendment caused by classification errors.

![How to Quickly Resolve Document and Commodity Inspection Issues for Thailand Plastic Import](https://cndpic.sh-zhongshen.com/uploads/tradepics/LWb5Y251dOLgy.webp)

In terms of price,the customs will compare the international market price quotation to prevent tax evasion by underreporting prices.Some Thailand suppliers may provide low-value invoices for tax avoidance purposes,which brings huge tax supplementary risks to domestic importers.With years of accumulated industry data,Zhongshen can assist enterprises in preparing authentic and effective payment vouchers,insurance policies and freight documents,to build a complete transaction price certification chain.Once the customs raises a price query,we can quickly provide reasonable explanations and supporting materials,resolve disputes through the negotiation mechanism,and ensure the goods are released as soon as possible.

### Statutory Commodity Inspection and Key Testing Indicators

According to the provisions of China’s Commodity Inspection Law,some plastic raw materials are subject to statutory inspection,and must be inspected by the commodity inspection authority before or after customs declaration.In 2026,commodity inspection departments have implemented stricter testing on environmental indicators of imported plastic granules,focusing on screening whether the goods are mixed with solid waste.This is the "minefield" that all importers are most worried about.In agency operations,Zhongshen strictly distinguishes between primary-form plastics and recycled plastics.

For virgin materials,we focus on checking whether the appearance,odor and particle size are consistent with the contract; for recycled materials,we must ensure that they comply with the Environmental Control Standard for Solid Wastes Imported as Raw Materials.If the commodity inspection department determines that the goods are suspected of being solid waste,samples will be sent for professional identification,which is a time-consuming process.Zhongshen coordinates with overseas suppliers to provide authoritative third-party test reports before shipment,and guides domestic enterprises to declare truthfully,so as to minimize the probability of being sent for solid waste identification.After passing the commodity inspection,we will assist enterprises to obtain the Entry Goods Inspection and Quarantine Certificate in time,to ensure that the products can be legally put on sale.

## Compliance Comparison and Supervision Key Points for Plastic Raw Material Import

Different types of plastic granules have significant differences in import supervision conditions.To help enterprises understand the policy requirements more clearly,we have compiled a comparison table of supervision key points for common plastic types.

| Plastic Type (First 4 Digits of HS Code) | Main Supervision Certificate Requirements | Commodity Inspection Focus | Zhongshen Agency Strategy |
| --- | --- | --- | --- |
| 3901 (Polyethylene) | A (Entry Goods Clearance Form) | Appearance consistency,prohibited and restricted substances | Review MSDS in advance to ensure virgin material declaration |
| 3902 (Polypropylene) | A (Entry Goods Clearance Form) | Melt index,ash content testing | Use RCEP preferential tariffs to reduce costs |
| 3903 (Polystyrene) | A (Entry Goods Clearance Form) | Foaming agent residue | Classified declaration for transparent materials and modified materials |
| 3904 (Polyvinyl Chloride) | A (Entry Goods Clearance Form) | Vinyl chloride monomer residue,plasticizer | Focus on checking the compliance of VOCs content |
| Recycled Plastic Granules | A / Q (Solid Waste Import License) | Solid waste attribute identification,general impurities | Strictly review licenses,track and inspect the whole process |

## Practical Case: Avoid Classification and Solid Waste Risks

To illustrate the value of agency services more intuitively,we review a real case handled by Zhongshen.At the end of 2025,a plastic product factory located in Zhejiang planned to import a batch of high density polyethylene (HDPE) granules from Thailand for the production of industrial pipes.As this factory was directly purchasing from Thailand for the first time,it was unfamiliar with the import process,and the bill of lading sent by the overseas supplier only had the goods description "Plastic Granules",with no specific material description.

After receiving the customer’s consultation,Supervisor Luo sharply pointed out the risks involved.With only the general description "Plastic Granules",the customs cannot determine the specific HS code,and the document will most likely be rejected for correction,or even be listed as a key inspection object due to unclear information.Supervisor Luo immediately contacted the shipping department of the Thailand factory,requesting it to provide a detailed product technical parameter sheet,and revise the goods description on the bill of lading and invoice to "High Density Polyethylene Granules (Recycled 100%)".

However,the key phrase "Recycled 100%" aroused high alert from Supervisor Luo.The customer originally thought it was ordinary virgin material,but it was actually recycled material.According to the latest 2026 supervision policy,importing recycled plastic granules requires a Solid Waste Import License,which the customer did not have the relevant qualification to obtain.If they declared blindly,once it was verified that they imported recycled solid waste without a license,the consequences would be unimaginable.

Supervisor Luo quickly feedback this situation to the customer,and suggested suspending shipment.Subsequently,Zhongshen assisted the customer in finding a new Thailand supplier with virgin material supply,and re-signed the trade contract.Before the new batch of goods was shipped,Supervisor Luo’s team assisted the customer in completing all pre-shipment document review work,ensuring that the certificate of origin perfectly matched the customs declaration form.After the goods arrived at Shanghai Port,although they were randomly selected for inspection by the customs system,the goods were released smoothly in only half a day thanks to complete documents,accurate declaration elements,and on-site inspection confirming that the goods were virgin granules.

This case fully demonstrates the key role of professional agencies in risk identification and compliance control.Without the early intervention of Zhongshen,the enterprise would most likely face the risk of cargo return or even criminal filing.

## Risk Avoidance Checklist for Import Operations

Based on years of operational experience,Zhongshen has compiled a risk avoidance checklist for Thailand plastic imports for the reference of relevant enterprises.

- **Prohibit false trade**: Ensure that sales contracts,invoices,and bills of lading are fully consistent with the actual cargo circulation and capital flow,to avoid suspicion of money laundering or tax fraud risks caused by inconsistency of the three streams.
- **Declare attributes truthfully**: Clearly distinguish between virgin materials and recycled materials,and never attempt to falsely declare recycled materials as virgin materials for import.The customs has advanced solid waste identification technology.
- **Standardize origin declaration**: Make full use of RCEP tariff preferences,but ensure that the goods meet the standards of "wholly obtained" or "regional value content",to prevent subsequent verification and tax recovery.
- **Improve element declaration**: The declaration elements on the customs declaration form (such as appearance,composition,brand,model,etc.) must be detailed and accurate,to avoid system document rejection caused by non-standard element filling.
- **Pay attention to foreign exchange compliance**: When purchasing foreign exchange to pay for goods,strictly abide by national foreign exchange management regulations,make payment through bank review of contracts,invoices and customs declaration forms,and strictly prohibit settlement through underground banks.

## Summary

In the complex and changing international trade environment in 2026,importing plastic granules from Thailand is a systematic project with extremely high professional requirements.From the qualification review of source suppliers,to the fine processing of document data,and then to the emergency response of port customs clearance,every link has hidden compliance risks.With 20 years of industry accumulation,Zhongshen standardizes and makes transparent the complex customs clearance links through full-process,one-stop agency services.We not only help enterprises solve practical problems in logistics and customs clearance,but also build a solid firewall for enterprises’ import business through a professional risk control system,allowing customers to obtain high-quality raw material resources with lower compliance costs and higher efficiency.

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