Auditing a Chinese Food Machinery Factory: A 12-Point Checklist

You've shortlisted three Chinese suppliers, your gut says factory #2, and you're flying out next month to inspect them in person. Or you're sending a third-party inspection firm to do it for you. Either way, here's what to actually look at — beyond the polished sales tour.

Before you arrive: ask for these documents

• Business license with the same company name as your contract
• ISO 9001 certificate — verify on the issuing body's website, don't trust the PDF
• CE conformity declarations for the specific product family you're buying
• Factory layout drawing with department locations marked
• List of last 10 customers with countries and equipment delivered (you want to call 2–3)

If they can't or won't share these before your visit, that itself is information.

On arrival: 12 things to check

1. The address matches the business license

Sounds basic. Many Chinese suppliers run an office in one location and outsource manufacturing elsewhere. Look at the gate — does it match the address on their license? Is the company name on the gate the same as on your contract?

2. Workshop layout makes process sense

Good fabrication shops have a logical flow: receiving area → cutting bay → rolling/forming → welding → polishing → assembly → testing → packing. Workshops where finished tanks sit next to raw sheet, or polished surfaces sit next to grinding sparks, will deliver scratched and contaminated product.

3. Welding is happening on the day of your visit

Walk the welding bay. You should see TIG/orbital welders working — sparks flying, work in progress. If the bay is empty during business hours, the work is being done elsewhere (i.e., subcontracted).

4. Welding certification is on display

Each welder should have a current certification card visible at their station. Ask to see one or two. Photograph the cards — you'll cross-reference later.

5. Polishing equipment exists

Sanitary stainless requires mechanical polishing (Ra ≤ 0.4 µm internal, typically). You should see dedicated polishing wheels and operators. If the workshop has welders but no polishers, polishing is being subcontracted — quality risk.

6. Stainless steel raw stock is segregated by grade

304 and 316L sheets should be stored in clearly-marked, separate areas. If they're piled together, expect mix-ups in production. Photograph the storage area and the labels.

7. Mill certificates exist for current jobs

Pick a tank in production — any tank — and ask to see the mill certificate for the steel used in it. The supplier should be able to produce this within 15 minutes. If they need "a few days," they don't routinely keep traceability.

8. Quality control is a real department

Look for a dedicated QC office or area, with documented inspection records on visible boards. Ask to see the last 5 inspection reports. Real QC has real paperwork.

9. Pressure testing equipment is installed and recently used

Tanks should be pressure-tested before shipping. Look for a hydraulic pressure pump and gauges. Ask for recent test reports — they should be dated within the past two weeks.

10. Electrical assembly is in a clean, dust-free room

Control cabinets, PLC programming, wiring harness — all should happen indoors, away from welding sparks and grinding dust. If electrical work is happening on the open shop floor, expect contamination issues.

11. Outbound packing is professional

Look at how finished equipment is being crated. Is it stretch-wrapped, foam-padded, secured to a wooden frame? Or is it just bubble-wrapped and pushed into a container? Bad packing causes shipping damage that's almost impossible to claim back.

12. The same staff are present today as last week

Casually ask a few workers how long they've been at the factory. High staff churn (most workers under 6 months) means inconsistent welds and workmanship. Stable shops will have welders with 5+ years.

Red flags that should kill the deal

• You're shown a "showroom" but not allowed into the actual workshop
• Welding is happening, but no welders are present in the bay (work was started for the visit)
• The factory looks dramatically nicer in their photos than in person
• The "engineer" answering your technical questions doesn't know basic specs of their own equipment
• They claim certifications they can't produce documents for
• Major equipment in the photo gallery has different paint colors than what's on the floor (suggests outsourcing)

What good looks like

You'll know a good factory when you walk in. The floor is swept. Workers are wearing PPE. There's a clear flow from one end to the other. Tanks in progress are labeled with job numbers. The QC office has documented procedures pinned to the wall. The owner or sales engineer can answer your technical questions without checking with someone.

The bad ones feel chaotic. Half-finished work is stored haphazardly. There's nobody to ask technical questions. You feel like you're being kept moving, not allowed to stop and look.

An hour of walking the floor tells you more than three months of email negotiation. If you can't visit yourself, hire a third-party inspector who can. The fee — typically $300–600 per visit — is the cheapest insurance you'll buy in the entire project.

After the visit: the follow-up

Within 48 hours, write up your notes and photos. Send them to the supplier with any questions. A good supplier responds with detailed answers and additional photos within a week. A bad supplier deflects, delays, or just disappears. That response itself is part of your evaluation.