Shipping Machinery and Industrial Equipment from China: Weight, Crating, and Customs Documentation

Machinery is one category where the logistics are genuinely harder than average. A CNC machine, an injection molder, a generator, or an industrial compressor doesn't behave like a pallet of consumer goods. The weight is real, the dimensions often push against standard container limits, the customs documentation requirements are detailed, and the consequences of getting any of it wrong — a cracked casting from inadequate crating, or a shipment stuck at customs for missing technical docs — are expensive.

China is the world's largest exporter of machinery, so the supply chain is mature. Factories in Zhejiang, Jiangsu, Guangdong, and Shandong ship heavy equipment globally every day. But that doesn't mean the process is automatic.

Weight Is a Real Constraint — Not an Afterthought

For most freight categories, weight is secondary to volume. For machinery, it's often the binding constraint.

Standard 20ft containers have a payload capacity of around 28,000 kg. A 40ft standard has roughly the same payload despite being twice as long — the limiting factor is often road truck axle loads, not the container itself. Road limits vary by country, but many sit around 26,000–28,000 kg total truck weight, which means a heavy machine can easily consume the entire payload of a container.

Some things to know:

If the machine exceeds the container floor load rating (typically around 1.5 tonnes per linear meter for a 20ft), you'll need spreader beams or reinforced floor protection.
Weight distribution matters — a machine that's too heavy for the front third of the container will fail a port inspection or cause handling problems.
Always get the precise gross weight and center of gravity from your supplier before booking freight. "Approximately X tonnes" is not good enough.

When a Standard Container Won't Work: Out-of-Gauge Loads

Standard 20ft and 40ft containers have usable internal dimensions of roughly:

20ft: 5.9m long × 2.3m wide × 2.4m high
40ft HC (high cube): 12m long × 2.3m wide × 2.7m high

If your equipment exceeds those dimensions, you're into out-of-gauge (OOG) territory.

Options for OOG machinery:

Flat rack containers: open-sided, open-top platforms for wide or tall loads. Available in 20ft and 40ft, collapsible or fixed-end. Your machine sits on the platform and is secured with chains or lashing.
Open-top containers: standard box dimensions but with a removable roof, for machinery that's too tall to load through the doors.
Break-bulk: for very large or irregularly shaped equipment that can't fit on any container type, shipped as individual pieces on the vessel's deck or in the hold.

OOG shipments require:

Pre-booking surveys and dimensional reports
Port approval at origin and destination
Specialized lashing and securing plans
Higher freight rates and longer booking lead times

Not all freight forwarders handle OOG regularly. Make sure yours does, and get the dimensional report to them early. See China freight lanes and services for carriers that handle OOG cargo.

Crating: Don't Trust the Factory Default

Machinery manufacturers in China vary widely in how well they crate for export. Some build excellent wooden crates with proper blocking, bracing, and moisture-barrier treatment. Others staple a few planks around the machine and call it done.

What proper export crating for heavy machinery includes:

Structural timber crates with internal bracing matched to the machine's weight distribution and lifting points
ISPM-15 treated timber — this is mandatory for most countries. Wood packaging must be heat-treated or fumigated and stamped; non-compliant timber will be seized at customs or sent back
Moisture protection — desiccant packs inside sealed polyethylene lining, particularly for long sea voyages or rail transit through climates with high humidity variation
Bolt-down or welded mounting to the crate base so the machine can't shift under the dynamic loads of ocean transit
Lifting lug and rigging instructions marked clearly on the exterior

Budget for crating as a line item. If the quote from your supplier doesn't include proper export crating, add it. Getting this wrong can write off a machine that cost tens of thousands of dollars.

Customs Documentation: More Than the Basics

Machinery imports require more paperwork than consumer goods, and missing documents cause real delays.

What customs authorities typically want:

Commercial invoice with machine model, serial number, specifications, and country of origin
Packing list with gross and net weights and crate dimensions
Bill of lading or air waybill
Manufacturer's declaration or certificate of origin — required for preferential duty rates under applicable trade agreements
Technical documentation — some countries require operation manuals or circuit diagrams for electrical equipment
CE marking documentation for machines sold into the EU — if the equipment requires CE marking, get the Declaration of Conformity before it ships
Conformity assessment certificates — varies by machine type and destination (pressure vessels, lifting equipment, electrical switchgear all have specific requirements)
Used equipment: if you're importing second-hand machinery, many countries require additional pre-shipment inspections and certifications

Work with a customs broker who has experience in your specific equipment type. Machinery classifications can be complex, and the HS code determines both the duty rate and what additional documentation is triggered. Common headings include:

8456–8466: machine tools (milling, turning, grinding, forming)
8477: rubber/plastics processing machinery (injection molders, extruders)
8479: other general-purpose industrial machinery
8501–8504: motors, generators, transformers
8537: industrial control panels and switchgear

Confirm the correct heading with your broker. Some machinery categories face anti-dumping measures or import quotas in certain markets — worth checking before you finalize supplier and pricing negotiations. The HS codes and import duties guide explains how to research this.

Realistic Timeline for a Machinery Import

Lead time at factory: 4–16 weeks, depending on whether it's a stock item or custom-built
Crating and export preparation: 1–2 weeks
Sea freight to Europe: 28–35 days
Sea freight to US East Coast: 30–38 days
Customs clearance: 3–10 days (longer if documentation is incomplete or inspection is triggered)
Port delivery and installation site delivery: 2–5 days

Door-to-door, budget 3–6 months for a custom machine. For off-the-shelf equipment you can get closer to 2–3 months.

Before You Book

Confirm gross weight, dimensions, and center of gravity in writing with your supplier
Establish whether the load is OOG before approaching freight forwarders
Specify ISPM-15 compliant crating in the purchase order
Collect all technical documentation before shipment, not after it arrives
Check whether your destination country has any import licensing requirements for the specific machine type

Use the freight estimator to get initial rate indications for heavy-lift and standard cargo on your lane, or explore China freight services including specialized heavy cargo options.