This page lists certifications held by DERVOS VALVE, with the issuing body, certificate number and validity period for each, and a scan available on request.
Current status
No certificates are listed on this page yet.
This is deliberate. Certification claims are the easiest thing on a supplier website to assert and the most damaging to assert wrongly - a buyer who discovers that a listed certificate does not exist, or expired two years ago, reasonably concludes that nothing else on the site can be trusted either.
Certificates will be listed here as they are confirmed, each with:
- Certificate name and scope
- Issuing body
- Certificate number
- Issue date and expiry date
- A scan available on request
What buyers should expect to verify
For a power plant valve supplier, the certifications typically relevant are:
ISO 9001 - quality management system. Check the scope statement, not just that the certificate exists. A certificate whose scope covers “trading of industrial valves” is telling you something different from one covering “design and manufacture of forged steel valves”.
PED / Module H or H1 - required for valves placed on the market in the EU as pressure equipment. Module H covers full quality assurance; H1 adds design examination. If your project is in the EU, this is not optional and it cannot be arranged after manufacture.
CE marking where PED applies.
API monogram for the relevant API product specifications, where the specification requires monogrammed product.
ISO 14001 / ISO 45001 - environmental and occupational health management. Frequently requested in EPC prequalification.
Manufacturer licence for special equipment (特种设备制造许可证) - required in China for pressure-retaining equipment manufacture. Relevant for Chinese-standard projects and worth checking for any Chinese manufacturer.
How to verify a certificate
Certificate numbers on ISO certificates can be checked against the certification body’s public register. IAF CertSearch aggregates many of them. This takes a few minutes and is worth doing for any new supplier.
For PED notified body certificates, the notified body number and certificate reference can be checked with the notified body directly.
If a supplier is reluctant to provide the certificate number as well as the scan, that reluctance is itself information.
What we ask you to check about us
The same things. When these certificates are listed here, verify them. If any number does not check out against the issuing body’s register, tell us - and reconsider the rest of what we have told you.
A supplier that invites verification and one that provides a wall of certificate thumbnails are making very different offers.