What EN 285 covers
EN 285 sets requirements and tests for large steam sterilizers used mainly in healthcare to sterilize medical devices and their accessories, such as wrapped instruments and porous loads. A large sterilizer is one whose chamber holds at least one sterilization unit (STU). Smaller steam sterilizers fall under EN 13060 (CEN).
| Area | What it covers in outline |
|---|---|
| Chamber and size | Chamber sizing, with the sterilization unit as the basic module |
| Performance | Sterilization temperature band, holding time, air removal, steam penetration and drying |
| Steam supply | Steam quality at the sterilizer, such as non-condensable gases, dryness and superheat |
| Safety and controls | Door interlocks, process control, indicating and recording instruments |
| Tests | Type tests and works tests, such as thermometric, steam penetration, air leakage and load dryness tests |
| Documents | Information the maker supplies, such as instructions and test records |
Typical tender parameters for a large steam sterilizer
A hospital tender usually states the machine it wants in a schedule or datasheet. The lines below are the ones that most often differ from a maker's standard offer.
| Tender line | What to check in your datasheet |
|---|---|
| Chamber size in STU | Usable chamber size, and how many STU your model holds |
| Single or double door | Pass-through (barrier) design between dirty and clean sides, if asked |
| Cycles and temperatures | Which cycles you offer, at which sterilization temperatures and holding times |
| Cycle time | Whether the tender's cycle time includes drying and a full load, and on what basis you quote yours |
| Steam source | Building steam, clean steam, or an integral steam generator |
| Utilities | Water, electrical supply, drain and compressed air figures in the tender's units |
| Records and traceability | Printer, electronic batch records and the data interface the hospital names |
| Tests and documents | Factory tests, site tests, witnessing, and the validation documents to hand over |
Where EN 285 sits beside other documents a tender names
Tenders rarely cite EN 285 alone. Validation and routine control of a steam sterilization process are usually brought in through EN ISO 17665. National guidance may add its own tests and documents, such as HTM 01-01 in England. Pressure vessel and electrical safety rules apply to the machine too. Read each one the tender names, and treat any that your offer does not meet as a deviation.
How to check a hospital tender against your sterilizer datasheet
- List every requirement in the tender schedule, specification and any national guidance it names.
- Match each requirement to the line in your datasheet or standard offer that answers it, with the page.
- Mark each one compliant, deviation or clarification, and write why.
- Price the extras: witnessed tests, validation support, extra cycles or interfaces.
Write each gap as a row in your technical deviation list, and keep the full list in an engineering compliance matrix. OdysseyGPT drafts both from the tender package and your datasheets, with a quote and page for each row, for an engineer to check. It reads PDF, Word and Excel files, not drawings. See OdysseyGPT for manufacturing.