Use the applicable maximum working-pressure rating when evaluating a hydraulic hose quotation. A published burst-pressure figure is not permission to operate at that pressure. Keep the exact hose, fittings and assembly documentation linked; a hose-only figure does not settle the rating of the supplied assembly.
This guide concerns purchasing evidence. It gives no instructions for fabrication, pressure testing, installation or hydraulic work. DFC Cari has not tested a hose assembly or inspected the machine that will receive it.
An explicit manufacturer distinction
Section 2.2 of the Parker Safety Guide says burst ratings concern manufacturing tests and do not authorize use above the published working rating. It also explains that the assembly limit takes account of the hose or tube and fittings. The complete product literature and qualified selection remain necessary.
A historical example makes the labeling difference visible: Parker Bulletin 4480-B51-US, September 2001, page 2, lists 471TC-8/471ST-8 with 4,250 psi maximum working pressure and 17,000 psi minimum burst pressure. These are old US-bulletin figures, checked on October 5, 2026. They illustrate two columns; they are not the acceptance specification for a hose offered today.
Build a six-field hose record
| Field | Request from the supplier | Keep separate |
|---|---|---|
| Hose identity | Manufacturer and complete hose designation/size | A family name alone |
| Fitting identity | Complete end-fitting designations | Thread appearance alone |
| Working rating | Applicable published rating and conditions | Minimum burst figure |
| Assembly basis | Document supporting the supplied combination | Hose-only catalog data |
| Application review | Relevant fluid, temperature and machine requirements | An unsupported universal suitability claim |
| Document control | Edition, date, page and applicable market | An undated screenshot |
A comparison method that retains the unknowns
Give each quotation a reference and retain the full manufacturer document behind the rating. Photograph or obtain the supplied identity markings where available, but do not treat a legible marking as proof of assembly quality.
Copy maximum working and minimum burst figures into different labeled columns. If a quotation gives an unlabeled pressure, ask which rating it represents and request its source. Do not create a working rating by dividing a burst figure by an assumed factor.
Ask the supplier to identify the documentation for the complete hose-and-fitting combination and the conditions relevant to the application. Give the machine requirements from the responsible technical team to the supplier; do not derive them from a gauge reading or a buying article.
If an older bulletin and the current quotation differ, record the difference and seek applicable current documentation. A familiar part family does not eliminate revision, market or variant questions. Keep written qualifications beside the rating rather than hiding them in a separate email.
What this record can and cannot resolve
The file can establish whether a seller’s stated figure has a clear identity, label and documentary basis. It cannot certify the present hose condition, assembly workmanship or suitability for every pressure transient and fluid condition.
A missing document is a reason to request clarification or withhold a suitability conclusion. It is not proof that the seller is dishonest. Qualified technical review is still required before acceptance for the actual application.
Use the DFC Cari machinery hub for related specification checks. Our editorial recommendation is to make the working-rating evidence auditable and keep any burst figure in its proper documentary context.
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