This is the question that stops more export orders than price does. A buyer receives a Chinese certificate, cannot place it in any framework they recognise, and moves on. The confusion is understandable, because the Chinese certificate and the international ones are built on the same technical standards while carrying none of the same legal weight. Here is what each one actually covers, and what to ask for.
The short answer, by destination
| Destination | Explosion-proof equipment | Fall protection |
|---|---|---|
| European Union | ATEX (mandatory for the EU market) | EN 361 harness, EN 362 connectors, EN 795 anchors |
| Middle East Saudi Arabia, UAE, Qatar |
IECEx is widely recognised. Saudi customs paperwork may additionally require SASO / SABER conformity documents. | ANSI or EN equipment is commonly accepted; the project specification decides. |
| Southeast Asia, Australia | IECEx — a single certificate is accepted across IECEx member countries. Australia can convert from IECEx. | AS/NZS 1891 in Australia and New Zealand. |
| North America | UL or CSA, under the Class / Division or Zone system | ANSI Z359 equipment used under OSHA 1910.140 and 1926.502 |
| China (domestic) | GB 3836 series, issued as a Chinese Ex certificate | GB 6095-2021 |
Why the Chinese certificate is not accepted abroad
The technical substance is not the obstacle. China's GB/T 3836 series is equivalent to the international IEC 60079 series — the explosion-protection concepts, test methods and equipment markings are essentially aligned. A Chinese-certified unit does not become a different machine because it crosses a border.
What does not travel is the certification system. The three frameworks work differently:
- China's Ex certificate is a domestic mandatory certification. It is the legal basis for installing and passing acceptance checks on a Chinese site, and it has no legal effect outside China.
- IECEx is a voluntary international system: product testing plus a factory quality-system audit, with certificates published in a public register and recognised across more than 80 member countries. One certificate covers multiple export markets, which is why it is the usual choice for a manufacturer selling into several regions.
- ATEX is an EU directive. It is mandatory for placing equipment on the EU market and valid only inside the EU; it is what allows the CE marking to be applied for hazardous-area equipment.
The practical consequence: a unit holding only the Chinese Ex certificate cannot substitute for ATEX or IECEx in a tender. Conversely, an ATEX or IECEx certificate does not satisfy Chinese acceptance requirements for a domestic project. Certificates are not interchangeable in either direction.
Fall protection runs on three parallel systems
Confined space monitoring and fall protection are governed by separate standards, and fall protection is split three ways. A full-body harness built to China's GB 6095-2021, to the US ANSI Z359 series used under OSHA's 1910.140 and 1926.502, or to Europe's EN 361, is tested and marked differently in each case. Load ratings, test procedures, attachment-point geometry and labelling requirements are not identical, so certification is obtained per market rather than converted from one system to another.
For a confined space entry specifically, note that US practice layers a further requirement on top of the harness standard: OSHA 1910.146(k)(3) requires a chest or full-body harness with a retrieval line, arranged so that a worker can be removed without a second person entering the space. A harness that satisfies a fall-arrest standard is not automatically the right choice for entry and retrieval — check the attachment points against the rescue method on your site.
What Yunku holds today
So you can plan against facts rather than assumptions:
- ISO 9001, ISO 14001, ISO 20000 and ISO 45001 management-system certificates
- Chinese explosion-proof certificate for the intrinsically safe marking Ex ib IIC T4 Gb (GB 3836 series) — a domestic certificate
- CE marking, IP65 rated enclosures, third-party test reports and patents
We hold the Chinese Ex certificate. Where a project requires IECEx or ATEX, tell us the destination market and the equipment model at enquiry stage and we will confirm the current certification status in writing for that specific configuration, so nothing is assumed on either side.
What to ask any supplier for
Whatever country you are buying from, the same evidence settles it:
- Certificate copies, not datasheet claims. A line in a brochure saying "ATEX compliant" is not a certificate. Ask for the document, with the equipment model and serial range on it.
- Certificate numbers you can verify yourself. ATEX certificates can be checked in the EU ATEX equipment database; IECEx certificates in the public IECEx register. Verification takes a few minutes and removes the doubt entirely.
- Component-level certificates for a system. A monitoring station has a control cabinet, sensors and communications inside it. A system-level declaration with no component certificates is incomplete.
- Validity dates. Management-system certificates expire. Check the current version, not the one issued three years ago.
Standards change; confirm before you order. The mapping above is a planning aid to help you know which certificate to ask for. Standard numbers, editions and market-entry requirements are revised over time, and customs and project specifications can add requirements beyond the certificate. Confirm the current text and your project's specific requirements with the relevant certification body or your local authority before issuing a purchase order.