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Import & Trade Compliance

DDP, Tariffs & HS Codes for FRP Profile Imports

A practical guide to Incoterms, HS/HTSUS classification, and Section 301 tariff exposure for buyers importing pultruded FRP profiles — so the price you're quoted is the price that lands at your jobsite.

Published

Jul 3, 2026

Updated

Jul 3, 2026

Author

Duowei Wang, Ph.D.

Industry research and education — markets, standards, and pultrusion adoption

Technical Review

Yifan Liu, Application Engineer

Standards and application check

Standards and References

HTSUS 3926.90HTSUS 7019Section 301 (USTR)Incoterms® 2020
Why Landed-Cost Surprises Happen

Three variables, quoted separately, that should be quoted together

A landed-cost surprise on an FRP import almost always traces back to one of three things being left out of the initial quote: which Incoterm actually applies (who pays freight and duty, and when risk transfers), which HS/HTSUS heading the profile is classified under, and whether that heading currently carries Section 301 or other trade-remedy exposure. Any one of these left unstated turns a clean FOB unit-price quote into a landed cost that is 20–30% higher once the shipment clears customs.

This page lays out all three in one place. For country-specific detail already worked through for real projects, see the United States sourcing page and the Canada passive house window page.

Incoterms for FRP Imports

FOB vs CIF vs DDP vs DAP — who does what

IncotermFreightImport clearanceDuty paid byBest for
FOB (Free on Board)Buyer books and pays ocean/air freight from the origin portBuyer clears import customs at destinationBuyerBuyers with an existing customs broker and freight forwarder who want direct control over the import leg
CIF (Cost, Insurance & Freight)Seller books freight and insurance to the destination portBuyer clears import customs at destinationBuyerBuyers who want one seller-arranged freight leg but still handle their own import clearance
DDP (Delivered Duty Paid)Seller arranges freight door-to-doorSeller clears both export and import customsSeller — duty and tariff are built into the quoted priceBuyers who want one landed-cost number with no customs surprise, and no in-house import compliance team
DAP (Delivered at Place)Seller arranges freight door-to-doorBuyer clears import customs (duty/tax not prepaid by seller)BuyerBuyers who want door delivery but prefer to self-file duty for tax-recovery or bonded-warehouse reasons

F1 Composite quotes FOB, CIF, and DDP on request. DDP USA and DDP Canada quotes carry the current Section 301 / GST exposure pre-quoted inline, so the number in the quote is the number that lands at the jobsite.

HS / HTSUS Classification

One profile, more than one possible heading

Pultruded FRP does not have a single dedicated HS heading. Customs classification runs on the General Rules of Interpretation (GRI) “essential character” test — is the article’s defining characteristic its plastic resin matrix, or its glass-fiber content and form? The table below is illustrative of the candidate headings that show up in practice; it is not exhaustive and is not a substitute for a binding ruling on your exact profile.

HTSUS 3926.90 or 7019

Structural pultruded profile (I-beam, channel, angle, tube, flat bar) — no window/door hardware function

Classification turns on the General Rules of Interpretation (GRI) essential-character test: a resin-matrix-dominant plastic article is classified under 3926.90 (other articles of plastics), while a glass-fiber-content-dominant article can fall under 7019 (glass fibres and articles thereof). The same physical profile can be classified either way depending on composition ratio, finishing, and the importing country's prior rulings.

HTSUS 3925 (in some rulings)

Window / door frame profile (finished fenestration component)

Builders' ware of plastics for windows and doors is its own heading; a finished fenestration profile can be classified here instead of 3926.90 depending on how the importing customs authority treats the finished-component function versus the raw-profile form.

HTSUS 3916 (in some rulings)

Rod, bar, or linear-section stock of reinforced plastic

Monofilament, rods, and sticks of plastics have a dedicated heading that some rulings apply to certain linear FRP stock shapes, again subject to essential-character analysis.

Section 301 & Trade-Remedy Exposure

Two different regimes, often conflated

Section 301 tariffs apply by HTSUS heading against China-origin goods on the active USTR lists — if your profile’s heading is listed, the tariff applies to the shipment regardless of what the part is used for. Anti-dumping and countervailing duty (AD/CVD) measures are a separate regime that, for the composites industry, has historically targeted glass fiber itself (HTSUS 7019) and a narrower set of finished glass-fiber products more specifically than it targets pultruded structural profiles as a category. In practice this means: assume Section 301 exposure applies to most China-origin FRP profile headings, and check AD/CVD exposure specifically for your HS classification and origin rather than assuming it applies uniformly across every FRP product. Both lists change; confirm current rates for your exact heading and shipment date via your customs broker or the current USTR/CBP publications before finalizing a PO.

Quick Answers

DDP, HS codes, and Section 301 — frequently asked

What HS code applies to pultruded FRP profiles?

There is no single universal HS code for pultruded FRP — classification depends on the profile's composition, finishing, and end use, decided under the General Rules of Interpretation (GRI) essential-character test. Standard structural profiles most commonly fall under HTSUS 3926.90 (other articles of plastics) or 7019 (glass fibres and articles thereof); finished window/door components sometimes fall under 3925; certain rod/bar stock under 3916. The only way to get a number you can rely on is a binding ruling from the destination country's customs authority (a CBP Binding Ruling in the US) for your specific profile.

Does Section 301 apply to all FRP profiles imported from China?

Section 301 tariffs are applied by HTSUS heading against China-origin goods broadly, not against "FRP" as a product category — so if your profile's HTSUS heading is on an active Section 301 list, the tariff applies regardless of whether it is a bulk commodity shape or an engineered custom section. This is distinct from anti-dumping/countervailing duty (AD/CVD) measures, which historically have targeted glass fiber itself (HTSUS 7019) and a narrower set of finished glass-fiber products more specifically than they target pultruded structural profiles generally. Because both regimes are HS-code and origin specific and change over time, always confirm current exposure for your exact classification and shipment date via your customs broker or the current USTR/CBP published lists rather than assuming a blanket rate.

What is DDP and why does it matter when importing FRP profiles?

DDP (Delivered Duty Paid) is an Incoterms® 2020 rule where the seller handles export clearance, freight, import clearance, and duty payment, delivering to your named destination at one all-in price. For FRP buyers, the practical value is eliminating landed-cost surprises: HS classification disputes, Section 301 tariff exposure, and customs broker fees are the seller's problem to solve before quoting, not a variable the buyer discovers at the port. The trade-off is that DDP pricing embeds the seller's assumptions about classification and duty rate — a buyer who wants to control that assumption directly, or who can recover duty through their own bonded-warehouse or FTZ arrangement, may prefer FOB or CIF instead.

How do I get a binding customs ruling for my FRP profile?

In the United States, importers or their customs brokers can request a Binding Ruling from US Customs and Border Protection (CBP) via the Customs Rulings Online Search System (CROSS), submitting the profile's technical drawing, material composition (resin type and glass content by weight), and intended use. Processing typically takes several weeks. Canada and the EU have equivalent National Customs Ruling / Binding Tariff Information (BTI) systems. For a recurring import program, a binding ruling removes classification risk for every future shipment of that exact profile.

Can I avoid Section 301 tariffs on FRP sourced from China?

Not through misclassification — that is a compliance risk, not a savings strategy, and correcting an under-declared classification after the fact typically costs far more than the original duty. Legitimate levers are: (1) confirming your profile is classified under its correct, lowest-applicable heading rather than a higher-duty default; (2) checking whether your specific HTSUS subheading currently holds an active USTR exclusion; (3) longer term, Foreign Trade Zone (FTZ) delivery or a non-China production step that changes country of origin under substantial-transformation rules. There is no shortcut that avoids a correctly-classified, currently-tariffed heading.

Is DDP more expensive than FOB in total landed cost?

Not necessarily. DDP pricing bundles freight, customs brokerage, and duty into one number, which can carry a margin for the seller's risk-taking on classification and duty accuracy. FOB/CIF shift that same freight, brokerage, and duty cost onto the buyer directly, plus the buyer's own broker fees and the risk of a classification dispute. For buyers without an existing import compliance function, DDP is frequently cost-neutral or cheaper once broker fees and classification risk are counted — the real difference is who carries the compliance risk, not just which number is larger.

Need a DDP quote with tariffs pre-disclosed?

Our engineering team is ready to help you find the right FRP solution. Get in touch for technical consultation or a detailed quotation.