How to Verify a Chinese Steel Structure Supplier Before Paying a Deposit

1. Verify who is selling, fabricating, exporting, and receiving payment

Steel exporters often use related companies, export agents, leased workshops, or subcontract factories. That is not automatically unacceptable. The risk begins when the buyer assumes all names and locations represent one controlled manufacturing system. Build a simple entity map before discussing capability.

• Chinese business license name and unified social credit code
• English quotation name and the legal entity named in the contract
• Bank beneficiary and country of the receiving account
• Export entity shown on commercial documents
• Factory address, workshop ownership or lease evidence, and the processes performed there
• Relationship between the website, email domain, sales team, factory, and any subcontractors

2. Test engineering capability with the actual project package

A factory may be real and still be wrong for your project. Send a controlled sample of the actual design basis, drawings, connection details, tolerances, material grades, coating system, applicable code, inspection plan, and destination requirements. Then assess the questions the supplier asks, the assumptions it records, and the revisions it returns.

• Can the team explain the design basis, applicable code, load assumptions, and scope boundary?
• Who prepares shop drawings, connection calculations, bills of materials, nesting, and CNC files?
• How are drawing revisions approved and prevented from reaching production prematurely?
• Can the supplier identify difficult connections, weld access, distortion risk, tolerances, erection interfaces, and shipping constraints?
• Are technical clarifications answered by an engineer or merely relayed by sales staff?

3. Check whether welding evidence applies to your order

Collecting certificates is not the same as qualifying the work. Review the WPS, supporting PQR, and welder qualification records against the code, welding process, base material group, filler material, thickness and diameter range, joint type, welding position, and validity required by the project. Confirm that production welders can be traced to their qualifications and that consumables are controlled.

• Applicable welding code and contract-specific acceptance criteria
• WPS number linked to a valid supporting PQR
• Welder or welding-operator qualification range and current continuity
• Filler-metal storage, baking, issue, and return records where required
• Fit-up, preheat, interpass temperature, distortion, repair, and visual inspection controls
• NDT method, sampling rate, technician qualification, report traceability, and repair closeout

4. Follow material traceability from the mill to the shipping mark

Request a sample evidence chain for a recent comparable order. The mill test certificate should connect to receiving inspection, heat or batch identification, stock records, cutting lists, piece marks, fabrication records, inspection status, packing lists, and final dossier. Where full traceability is required, ask how identification survives cutting, blasting, painting, and repacking.

• Specified material grade, standard, dimensions, and any required impact-test condition
• MTC issuer, heat number, quantity, and consistency with the received material
• Positive material identification or independent testing when the risk warrants it
• Substitution approval and treatment of mixed heats, remnants, and unidentified stock
• Piece marking and packing-list links to drawings, zones, or erection sequence

5. Map owned and subcontracted production processes

Do not ask only whether the company is a factory. Ask who performs each process: detailing, procurement, cutting, drilling, assembly, welding, machining, galvanizing, blasting, painting, NDT, trial assembly, packing, and export loading. Subcontracting can be controlled, but invisible subcontracting breaks the evidence chain.

• Name and location of each approved subcontractor
• Which quality plan, drawings, WPS, inspection criteria, and records apply at that site
• Who releases work, manages nonconformities, and closes corrective actions
• Whether subcontractor or process changes require written buyer approval
• How Source Rating or the buyer's inspector can access subcontract production

6. Test capacity and schedule realism against current workload

Installed equipment is not the same as available capacity. Compare the proposed production plan with current orders, material lead times, engineering release dates, bottleneck machines, skilled labor, coating capacity, inspection resources, packing space, container or breakbulk planning, and holiday shutdowns. Ask for a week-by-week plan tied to measurable release points.

7. Put the evidence chain into the contract before the deposit

Verification findings matter only if they change the commercial controls. Attach the approved technical package, supplier and factory identities, subcontractor list, inspection and test plan, document schedule, change-control rule, packing standard, and payment milestones to the purchase agreement. Define the evidence required for each payment instead of paying only against a calendar date.

• No material, design, process, factory, or subcontractor substitution without written approval
• Buyer or third-party access for agreed inspections and record review
• Hold points before concealed work, coating, packing, and shipment
• Nonconformity, repair, re-inspection, delay, and rejection responsibilities
• Final payment or shipment release tied to accepted goods and a complete document dossier

8. An anonymized HOLD case: the factory claim did not match the evidence

In one anonymized early-stage review, an exporter presented itself as an established steel-structure factory. The public profile and quotation looked credible, but the legal, factory, and technical evidence did not form a consistent chain. The sales entity could not clearly demonstrate control of the claimed workshop, project-specific engineering answers remained superficial, and key welding and traceability documents were generic rather than tied to the proposed scope. The correct decision was HOLD—not an accusation of fraud, but a refusal to release a deposit until identity, production control, and project capability were independently verified.