Most buyers catch problems after the valves arrive at port. By then, freight is paid, customs is cleared, and a shutdown crew is mobilised. The cost of finding a defect onshore is ten times the cost of catching it at source. These five red flags show up consistently in valve sourcing from China. None of them require an engineer on a plane.

1. Certificate in a different legal entity name

The factory cannot provide a current API 6D or API 600 certificate linked to their own legal entity name. A certificate in a different company name is a subcontract or a borrowed licence. Walk away.

2. MTC heat number not on the valve body

The MTC (material test certificate) references a heat number that does not appear on the valve body markings. When the numbers do not match, the material is either substituted or the documentation was produced at a desk, not a furnace.

3. Lead time shorter than raw material procurement

The quoted lead time is shorter than the raw material procurement cycle for the specified grade. If a factory quotes CS A105 flanges in 3 weeks for a 500-unit order, ask where the steel is. Realistic lead times protect you.

4. No calibration record for the pressure test bench

The factory cannot produce a calibration record for their pressure test bench. Hydrostatic testing without a calibrated rig is a number on a datasheet, not a test.

5. Resistance to a third-party inspection clause

They resist a third-party inspection clause. A factory confident in its quality invites oversight. Resistance is data.

What we do

We review these exact checkpoints on every valve inquiry that comes through our desk. If you want to see what a proper pre-qualification questionnaire looks like for Chinese valve suppliers, we are happy to share it.

Contact: sales@meritustech.com · +86 134 8206 1802 · www.meritustech.com