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North America · sea freight from Shenzhen

Shipping from Shenzhen to Port Sulphur

Shenzhen to Port Sulphur

South China Sea · Taiwan Strait · North Pacific · Eastern Pacific · Panama Canal · Caribbean Sea · Yucatán Channel · Gulf of Mexico

Sea corridor illustration: Shenzhen to Port Sulphur, United States Simplified map with a curved corridor from Shenzhen via South China Sea, Taiwan Strait, North Pacific, Eastern Pacific, Panama Canal, Caribbean Sea, Yucatán Channel, Gulf of Mexico to Port Sulphur. Illustration only; not a vessel track or schedule. NORTH AMERICAPACIFIC OCEAN North PacificPanama Canal ShenzhenCHINA ORIGIN Port SulphurUNITED STATES ShenzhenSOUTH CHINA SEAGUANGDONGDEPARTURE AREA
  1. ShenzhenChina origin
  2. South China Sea
  3. Taiwan Strait
  4. North Pacific
  5. Eastern Pacific
  6. Panama Canal
  7. Caribbean Sea
  8. Yucatán Channel
  9. Gulf of Mexico
  10. Port SulphurUnited States
Geographic corridor illustration only, not a vessel track, port-call list or sailing schedule. The loading terminal, carrier, transshipment and dates are confirmed per shipment.

This route runs out of Shenzhen's Yantian and Shekou terminals, then follows the Pacific, the Panama Canal and the Caribbean; at the far end is the port of Port Sulphur.

The United States applies Section 301 and UFLPA scrutiny to Chinese lithium batteries and wants its manifest data before loading. The 5 points below are particular to this lane; each comes with what we do and the paperwork it touches.

What we need to start

  • Typhoon season Jun–Oct
  • Yantian / Shekou export
  • ISF filer
  • Supply-chain tracing file
  • HTS code 8507.60
Ask about this route United States ports from Shenzhen

Route profile

What sets Shenzhen → Port Sulphur apart

Origin port

Shenzhen (Yantian / Shekou)

Pearl River Delta battery cargo, often stuffed at factories in Dongguan or Huizhou, exported through Yantian or Shekou, with a typhoon season from June to October.

Import country

United States

A duty line set by the exact 8507.60 code, lithium supply-chain questions under UFLPA, and ISF and AMS filings that are due before the box is loaded.

Yantian port area in Shenzhen seen from the hills, with container berths along the bay
A loaded container ship on the horizon

Where this route gets difficult

What to watch between Shenzhen and Port Sulphur: 5 points

They run from the Shenzhen terminal through the voyage to Port Sulphur and the United States import file.

  1. Origin port

    Typhoon season squeezes Shenzhen cut-offs

    The Hong Kong Observatory puts the regional tropical cyclone season from June to October, busiest July to September. DG containers need their MSA filings approved and a signed packing certificate before loading, so a closed gate or a rolled vessel in typhoon weeks can push the whole document chain to a new sailing.

    What Anxin does: From June to October we build slack into the stuffing date, confirm the DG cut-off with the carrier the week before loading, and resubmit filings promptly if the vessel changes.

  2. Sea corridor

    North Pacific winter storms before the canal

    NOAA's Ocean Prediction Center has recorded hurricane-force North Pacific storms in every month from October to April, most often in December. The Pacific leg to Panama crosses that ocean.

    What Anxin does: For October–April sailings we check blocking and bracing on stuffing photos before sealing.

  3. Import country

    Unentered battery containers go to General Order after 15 days

    A container landed at Port Sulphur without a release permit may stay at the terminal only until the 15th calendar day. The carrier must then notify CBP and a bonded general order warehouse, which moves and stores the goods at the consignee's risk and expense (19 CFR 4.37). Not every general order warehouse can take Class 9 battery cargo, and where specialized storage is missing the port director decides where it goes.

    What Anxin does: We check with the importer's broker that the entry can be filed before arrival at Port Sulphur, and chase any missing invoice or HTS detail while the ship is still at sea.

  4. Import country

    Demurrage and detention invoices must follow FMC rules

    Battery containers held for DG checks or paperwork can run up demurrage and detention at Port Sulphur. Under the FMC's billing rule, in force since May 2024, carriers and terminals must invoice within 30 days with accurate, complete information, or the charge is not payable, and the billed party has at least 30 days to ask for a waiver or refund. A 2025 court ruling set aside only the section on who may be billed.

    What Anxin does: We keep the dates of discharge, availability and any DG hold for each container, so the importer can check invoices against them and dispute charges inside the FMC time limits.

  5. Import country

    A US-only carton mark for SP188 shipments

    Packages of UN3480 or UN3090 moving under IMDG special provision 188 skip the DG declaration at sea, yet 49 CFR 171.25(b)(3) still wants the 'FORBIDDEN FOR TRANSPORT ABOARD PASSENGER AIRCRAFT' mark or a Cargo Aircraft Only label on each one, and on packages of batteries with or in equipment over 5 kg net.

    What Anxin does: When the shipper declares SP188 for a Port Sulphur booking, we check the carton photos for the US marking or CAO label before stuffing, not after discharge.

Locator map of Port Sulphur, United StatesPort Sulphur
Locator map in the same projection as the corridor map; the dot marks the listed port position (29.48°N, 89.68°W).
Container ship being unloaded under red gantry cranes in Vancouver

Documents & compliance

Checklist for Shenzhen → Port Sulphur

Test reports, safety data sheets and import certificates come from the shipper, factory and importer, not from Anxin; our part is to review them before booking.

At the Shenzhen end

  • Confirmation from the carrier of the DG cut-off at Yantian or Shekou, rechecked in typhoon weeks
  • 'Made in China' marking on articles or containers checked on photos
  • Safety data sheet and dangerous goods safe-carriage declaration for the MSA cargo report
  • Customs packaging use-appraisal result for the dangerous goods packaging (with the maker's performance appraisal)
  • Container packing certificate signed by a certified packing inspector after supervised stuffing

Carrier and voyage

  • Canal routing and any canal-related surcharge confirmed for the booked vessel
  • Condition statement: new, used, damaged/defective (SP376) or for recycling (SP377)
  • SP188 cartons: US 'forbidden aboard passenger aircraft' marking or CAO label

At the United States end

  • ISF filer named; stuffing location and consolidator sent right after packing
  • HTSUS classification from the broker (8507.60.0010 vs .0020 decides the Section 301 line)
A cylindrical lithium-ion cell held between two fingers
Before you book

Send the file once, complete

Most delays on this route start with a document that exists but does not match: a UN number, a model name or a package count that differs between the Shenzhen filings, the carrier booking and the United States import file. We check the three against each other before the booking is confirmed.

Carriers we book with

Our booking panel; availability on this lane and acceptance of the declared UN numbers are confirmed for each booking. It does not mean that a listed carrier runs a direct service on this route. Carrier choice depends on the trade lane, cargo classification and each carrier's dangerous-goods acceptance at booking. The final carrier is confirmed on the booking.

Risk & mitigation

Risk table for Shenzhen → Port Sulphur

RiskWhereMitigationWho acts
Typhoon closes terminals or delays the vessel after filings are madeYantian / Shekou, Jun–OctSlack in stuffing date; refile quickly on vessel changeAnxin with the declarant
SP188 cartons without the US markingDischarge and onward truckingMarking or CAO label checked on carton photos before stuffingShipper, checked by Anxin

Questions

Common questions on the Shenzhen → Port Sulphur route

Yes. Under 49 CFR 171.25(b)(3), SP188 packages of UN3480 or UN3090 need the 'FORBIDDEN FOR TRANSPORT ABOARD PASSENGER AIRCRAFT' marking or a Cargo Aircraft Only label, and so do packages of batteries packed with or contained in equipment above 5 kg net. We check for it on carton photos before stuffing.

1 June to 30 November, peaking around 10 September, according to the US National Hurricane Center.

Since September 2026 Dongguan Customs and Dongguan MSA share dangerous-goods packaging certificate data and act jointly against false declarations, so the packaging certificate and the MSA filing should match exactly.

References

Where these points come from

  1. 19 CFR 134.11: Country of origin marking required (Legal Information Institute (e-CFR text))
  2. 19 CFR 149.2 – Importer security filing: requirement and time of transmission (eCFR / CBP)
  3. Section 301 Modifications Determination (Federal Register notice, Sept 2024) (Office of the U.S. Trade Representative)
  4. 49 CFR 171.25 – Additional requirements for the use of the IMDG Code (eCFR / PHMSA)
  5. Advisory to Shipping A-33-2026: Postponement of maximum authorized draft adjustment in the Neopanamax locks (Panama Canal Authority)
  6. Tropical Cyclone Climatology (NOAA National Hurricane Center)
  7. Hurricane force extratropical cyclones observed using QuikSCAT (Mariners Weather Log 49-1) (NOAA Ocean Prediction Center)
  8. Forecasting yearly number of tropical cyclones affecting Hong Kong (tropical cyclone season June–October, most active July–September) (Hong Kong Observatory)
  9. Export dangerous goods packaging inspection: service guide (Chinese) (General Administration of Customs of China (Lanzhou Customs service guide))

Next step

From enquiry to import

  1. 1EnquiryCargo, origin, destination
  2. 2Documents checkUN 38.3, SDS, packing
  3. 3BookingAfter carrier acceptance
  4. 4HandoverAt Shenzhen
  5. 5ImportClearance at Port Sulphur
Each step is confirmed in writing; an enquiry does not create a booking.

Ask about Shenzhen → Port Sulphur

Origin and destination are filled in; add the cargo facts you have.

Sending this form starts a review; it does not confirm carriage. Full enquiry form

After you send it

We check carrier acceptance for Shenzhen → Port Sulphur before any booking, and ask for missing battery documents first.

All destinations from Shenzhen · United States ports

Trailers backed up to the loading docks of a warehouse

Need Shenzhen → Port Sulphur reviewed?

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