Pre-Shipment Inspection (PSI)
Quantity, packing and marks, AQL sampling, workmanship, dimensions and nameplate checks before you pay the balance.
Details →Home › Services
Inspection services for valves and machinery
Third-party quality control for overseas buyers of industrial valves and machinery from Ningbo, Wenzhou, Taizhou and the rest of Zhejiang.
What we inspect
Industrial valves (gate, globe, check, ball, butterfly and similar), valve parts and general machinery made in Zhejiang. Each visit ends with an English report and the original photos.
During Production Inspection (DUPRO)
Catch workmanship and dimension problems mid-production, while there is still time to correct them.
Details →Valve Pressure Test Witnessing
Witness shell, seat and backseat tests to API 598, API 6D, EN 12266-1 or ISO 5208, as named in your PO.
Details →Loading Supervision
Container or truck loading watch: count, packing condition, container condition, seal photos.
Details →Factory Audit
Practical supplier check of capability, basic quality control and gauge calibration before you place an order.
Details →Optional add-ons
Coating DFT
Dry film thickness readings against your coating spec, with the gauge verified on reference foils. Confirmed in the quotation.
PMI witness
Positive material identification witnessed on the factory’s calibrated XRF. Results are indicative; XRF does not measure carbon.
Operation check
Open/close stroke, handwheel turns, operating effort, position indicator and gland condition, per your checklist.
Document review
MTCs (EN 10204 3.1), factory test records and gauge calibration certificates checked against the PO and heat numbers.
What we do not offer
To keep expectations clear: we do not issue product certificates, CE/PED or API monogram approvals, ISO certification audits, social-compliance audits, laboratory testing or NDT. We witness and report what we see on site.