Short answer
Working pressure refers to the service limit, test pressure to a defined test condition, and burst pressure to a separate strength test. The burst value is not a usable working pressure; no single universal ratio is assumed for every hose.
Information that should not be written in the same pressure field
| Term | How is it interpreted? |
|---|---|
| Working pressure | Service limit depending on the product and service condition |
| Test pressure | Pressure value of a specific test; not a permission for use |
| Burst pressure | Value from a strength test; not an operating setting |
Assembly pressure and system approval
The hose label alone does not determine the pressure limit of the whole assembly. The end connections are also assessed. Finding the lowest value among the components does not automatically turn incompatible components into an approved system. For this reason, assembly approval and component pressure must be assessed separately.
Source: S017
When passing on a pressure value
- For which product code and size was the value given?
- Under which temperature and fluid condition is it valid?
- Is it gauge or absolute; if unknown, is that stated explicitly?
- Is it a test value or a service limit?
- Can the current document and table row be shown?
Original editorial recommendation; not a clause of a standard.
Frequently asked questions
Can I find the working pressure by dividing the burst pressure by four?
This is not a universal selection method. The working value in the product documentation and the relevant service standard are the basis.
Can a hose that passed a test be used in every application?
No. Test scope and suitability for the application are separate assessments.
Original editorial recommendation; not a clause of a standard.
Source coverage
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S013
ISO 1402:2021 ISO · accessed 2026-10-19 Abstract; General information
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S017
Parker Safety Guide, Publication 4400-B.1 Parker Hannifin · accessed 2026-10-20 PDF page 2; 2.2 Pressure
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S030
ISO 7751:2016 ISO · accessed 2026-10-19 Abstract; General information