Chinese valve makers tend to misread CE in one of two ways: as “run a test, stick on a mark”, or as “buy a certificate” once a customer starts chasing. Neither survives EU customs or market surveillance. CE is not a test report — it is the conclusion of a conformity assessment procedure: classify under the directive, choose an assessment module, build the technical file, and have the manufacturer (with a notified body where required) sign the declaration of conformity before the mark may be applied.
In the PED, a valve is a pressure accessory — not a vessel, not a safety accessory. That classification fixes its category ceiling, the modules available and the testing obligations. This article follows the chain: in or out of scope → classification → module choice → essential safety requirements → technical file and DoC → what auditors pick up first. It is based on PED 2014/68/EU (mandatory since 19 July 2016, replacing 97/23/EC).
1. First, is it in scope?
- In scope: pressure equipment, assemblies and components with maximum allowable pressure PS > 0.5 bar, including valves, piping, vessels, safety valves and burst discs. Imported products included;
- Out of scope: long-distance transmission pipelines, municipal water networks, aerospace, defence, nuclear equipment, and transportable pressure equipment covered by separate directives;
- Fluid group drives risk: Group 1 covers flammable, toxic and explosive media; Group 2 covers water, air and similar low-risk media. The same valve in water and in natural gas can sit two categories apart.
Confirm this boundary before discussing categories. A valve for a gas network and a valve for a municipal water line follow different routes even at identical pressure and size.
2. Valves top out at Category III; safety valves reach IV
PED classifies by PS, DN and fluid group using the Annex II charts, producing SEP, I, II, III or IV. Two anchors:
- A valve is a pressure accessory, with a Category III ceiling;
- A safety valve is a safety accessory, assessed at Category IV (commonly module B+D).
So a claim that “our ball valves hold a PED Category IV certificate” is almost always a wording error — either a safety-valve certificate applied to valves, or a quality system covering Category IV described as a Category IV product.
| Category | Risk | Modules | Notified body | CE mark |
|---|---|---|---|---|
| SEP (sound engineering practice) | Lowest | None; manufacturer’s own control | No | Must not be applied |
| I | Low | A (internal production control) | No | Yes |
| II | Medium-low | A2, D1, E1 | Yes | Yes, with NB number |
| III | Medium-high | B+C2, B+D, B+E, B+F, H | Yes | Yes, with NB number |
| IV | High | B+D, B+F, G, H1 | Yes | Yes, with NB number |
SEP is the trap: SEP products do not carry the CE mark and must not be marked with it. Printing CE on a SEP valve to “look compliant” is a false marking — a worse position than leaving it off. The correct SEP package is design, material and test records plus a sound-engineering-practice statement.
3. Choosing a module: get it right once and save two years
The question is not which module is cheapest, but which matches the product range, volume and quality system. Three typical routes:
- H (full quality assurance): the notified body audits design and production systems and covers all categories. Best for manufacturers with many valve types — one certificate covers the range, and new models do not need individual type examinations;
- B + C2 / D / E / F: EU-type examination first, then production-stage surveillance (C2), production quality assurance (D), product quality assurance (E) or product verification (F). Suits a narrow, stable product line;
- A / A2 / D1 / E1: for Categories I and II, with A as self-declaration and A2/D1/E1 bringing in notified-body surveillance.
Rule of thumb on cost and time: H is heaviest up front (system documents, design review, site audit) but cheapest for renewals and new models; B+C2 is lighter up front but every new model repeats B, so a broad range pays more in total.
4. Essential Safety Requirements: what audits actually check
Annex I is a full-chain obligation, not a test result:
| Area | What is examined | Where it lands for valves |
|---|---|---|
| Design | Strength calculation covering pressure, temperature, corrosion, fatigue; overpressure protection | Shell thickness (EN 12516 series), stem and body-bolt strength, cavity relief (BCR) |
| Materials | Compatibility, traceability, certificates | EN 10204 3.1 (2.2 normally refused for Cat. III/IV); impact testing for low temperature |
| Manufacturing | Welding procedure qualification, qualified welders, NDT and personnel | Body weld repair, hardfacing, seat welds; RT/UT/PT/MT to EN ISO 9712 qualification |
| Testing | Pressure testing to harmonised standards | EN 12266-1 P10, P11, P12; fire testing to ISO 10497 / API 607 where required |
| Marking and instructions | CE mark, parameter marking, multilingual instructions | CE + NB number, PS/DN/material/flow direction, installation and maintenance instructions in the destination language |
Harmonised standards give presumption of conformity: testing to EN 12266-1 and designing the shell to EN 12516 presumes the corresponding ESRs are met. Deviate from them and you must demonstrate equivalence — far more work at audit.
5. Technical file and declaration: one missing item stops everything
A technical construction file normally contains:
- Product description and scope (PS, DN, temperature, fluid group);
- General arrangement and part drawings, strength calculations;
- Bill of materials with EN 10204 certificates;
- WPQR/WPS, welder qualifications, NDT reports;
- Test procedures and reports with actual pressure, medium, hold time and acceptance rate;
- Risk analysis and limits of use;
- Instructions and nameplate artwork;
- Declaration of conformity (DoC).
The DoC is not a stamp: manufacturer name and address (or authorised representative), product identification, directive number (2014/68/EU), harmonised standards applied, notified body name and number where applicable, signatory and date. The product range on the DoC must match the certificate — “certificate covers DN15–200, DoC says DN15–300” is a classic market-surveillance finding.
6. Six things auditors pick up first
- Wrong classification: classified on water service when the medium is natural gas (Group 1), or ignoring the temperature derating of PS;
- Material certificate grade too low: EN 10204 2.2 presented as 3.1 on a Category III product;
- Welder or NDT personnel not qualified: expired certificates, or scope not covering the method used;
- Incomplete test records: “passed” with no pressure, medium, hold time or leakage rate;
- CE mark not to spec: wrong proportions, missing NB number where required, CE applied to SEP products;
- Instruction language: English only, with no destination-language version, or missing installation, maintenance and relief guidance.
7. Beyond CE
- ATEX: valves for explosive atmospheres (gas, chemicals) fall under 2014/34/EU for ignition risk and antistatic behaviour;
- UKCA: Great Britain has its own marking regime; CE recognition there follows the latest published position — do not assume it is universal;
- API / ISO schemes: Middle East and Southeast Asian projects often require API 6D, API 607 and ISO 15848 in parallel; CE is European market access only;
- Test method: PED testing runs to EN 12266-1, whose acceptance language differs from API 598 — see EN 12266-1 test references and rates A–G.
FAQ
Do SEP products need the CE mark?
No — and they must not carry it. SEP means sound engineering practice with manufacturer-controlled safety and retained design and test records. Applying CE is a false marking.
Can a valve hold a PED Category IV certificate?
No. As a pressure accessory a valve tops out at Category III; Category IV belongs to safety accessories such as safety valves and burst discs. Claims to the contrary usually reflect conceptual confusion.
Does ISO 9001 satisfy PED?
No. ISO 9001 is a quality management system; PED requires a pressure-safety conformity assessment — classification, module, ESRs, technical file and notified-body involvement where applicable. ISO 9001 is the foundation, not the conclusion.
Does one H certificate cover every valve?
Coverage follows the certificate and its annexes, normally limited by structural type, pressure class, size and temperature. A new structure outside that scope (soft-seated to metal-seated, for example) needs an assessment of whether design examination must be extended; it cannot be assumed.
Classification charts, module requirements and ESR clauses follow the official PED 2014/68/EU text and notified-body practice; the tables above are for quick orientation in export quoting and compliance planning. For test methods see EN 12266-1, for US pipeline valve testing see API 6D, for fire and fugitive emissions see ISO 10497 vs API 607 and ISO 15848 vs API 624; the map of all four systems is in the valve test standards index.
Related test equipment
Each test above maps to a bench. Pick by valve type and by the item you need to prove:
- Valve pressure test machine — shell at 1.5x and seat at 1.1x, with a report per valve
- Valve comprehensive test bench — pressure, tightness, flow, torque and life cycling on one clamping system
- Pipe and connection leak test bench — pressure-decay and helium methods, judged against a leak-rate limit
- Valve testing equipment range — browse all models by valve type and test item
From test requirements to equipment selection
Provide the valve type, size, medium, pressure, applicable standard edition and acceptance items. Equipment test capability is not equivalent to product certification or regulatory conformity.