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Frequently asked questions
Straight answers about our valve and machinery inspection services.
Where are you based and which areas do you cover?
We are based in Ningbo High-tech Zone, Zhejiang, China. We cover Ningbo directly and travel to Wenzhou (Oubei, Longwan), Taizhou (Yuhuan, Wenling), Lishui and other Zhejiang cities. Travel outside Ningbo is quoted before you confirm.
Which products do you inspect?
Industrial valves (gate, globe, check, ball, butterfly and similar), valve parts and general machinery. If your product is outside our experience, we will tell you before accepting the job.
Which pressure test standards can you witness?
API 598, API 6D, EN 12266-1 and ISO 5208, or your own specification — always to the standard and edition named in your PO. The factory performs the tests; we witness and record them.
Are you accredited or certified?
No. ValveWitness Inspection is a small independent inspection service. We do not hold ISO/IEC 17020 accreditation and we do not issue certificates of conformity. References to API 598, ISO 2859-1 and other standards mean we follow those public standards, not that we hold a certificate from those organisations.
How much does an inspection cost?
From USD 220–260 per man-day in the Ningbo area, including the English report, photos and local travel. Pressure test witnessing adds USD 60–100 per day, or USD 150–180 as a half-day stand-alone job. Travel outside Ningbo is quoted separately.
How quickly can you inspect?
Please book 3–5 working days ahead where possible. Short-notice visits in the Ningbo area are often possible — ask us. We confirm scope and price within one working day.
When will I receive the report?
Normally within 24 hours of the visit, in English, with a PASS / FAIL / PENDING conclusion and the original photos.
What happens if the goods fail?
We report the findings with photos and suggested actions. You decide whether to release, rework or re-inspect. A re-inspection is charged as a new man-day.
How do you stay independent from the factory?
We report facts only, do not accept gifts or “arrangements” from factories, and every photo is time- and GPS-watermarked.
Can you do weekend inspections?
Sometimes, when the factory works and it is agreed in advance. Weekend work may be priced differently; we confirm before booking.
How do I pay?
The payment method and timing are confirmed in writing in the quotation before the job.
Will you keep my documents confidential?
Yes. Your PO, drawings, supplier details and reports are used only for your inspection and are not shared with other clients.