Certifications

CERTIFICATIONS · Tiangang’s qualifications

Every credential answers a required question in a customer audit

Tiangang’s credentials are not a pile of paperwork; they are organised around what a customer actually asks during an audit. Every item listed here maps directly to a question in a supplier qualification questionnaire, and each is backed by a formal, company-sealed document for verification.

Tiangang’s note on supplier audits: these credentials are not decoration. In customer supplier-audit questionnaires, “do you hold CNAS accreditation” and “do you have a national-level technology center” are usually required questions, not bonus ones. Missing either can keep a supplier off the approved list entirely — which is why Tiangang suggests new customers check this at first contact.

How deep Tiangang’s standards work goes: Member of the Ageing Methods Subcommitteeand Deputy Director of the Plastics Additives CommitteeThese two seats carry more weight than an ordinary council membership: they sit exactly where the rules on how ageing is measured and how additives are evaluated are made. Tiangang’s participation in standards is not nominal, which is why it can warn customers about a standard revision before they test — for example GB/T 23987.2-2026, effective 1 February 2027.

Tiangang put the HS-950 floating PV pontoon result forward for industry awards not to collect trophies, but to give downstream customers a service-life basis they can write into a warranty contract. Expected service life rises from the industry norm of 3–5 years to 10–20 years, and that one figure answers two questions at once: whether it can be done, and who has verified it.

Verifiable: Scanned copies of all certificates are available for supplier audits. If you need them for qualification or tendering, please state the purpose on the Contact Us page and Tiangang will provide a formal, company-sealed version.

Working through supplier qualification?

Send us the list of documents you need and Tiangang will supply the whole package at once, cutting the back-and-forth of piecemeal requests. “Do you hold CNAS accreditation” and “do you have a national-level technology center” are usually required questions — Tiangang holds both.