Short answer
In shipyard and marine applications, hose selection takes into account the external environment and the facility or vessel requirements as much as the fluid conveyed. It is not assumed that every hose to be used in a marine environment has the same fire, corrosion or class conditions.
Technical explanation
Manufacturer selection guides address external influences, fluid compatibility, connections and movement together. In a salty environment, the material and surface condition of metal connections must be evaluated separately. The presence of water, air, fuel and hydraulic duties in the same area does not mean they can be served by the same hose. If there is a project-specific class or fire requirement, which product and assembly it covers must be verified with the actual document.
Topic-specific checkpoints
| Item | Description |
|---|---|
| Duty | Fluid and temporary/permanent use |
| External environment | Humidity, salt, temperature and rubbing |
| Project requirement | Class, fire or customer requirement |
| Operation | Identification, protection and maintenance |
How to evaluate it in practice
State the place of use clearly in the purchase request: for example, temporary shipyard service, a permanent shipboard system or mobile equipment. Specify the hose's external exposure, connection material and mechanical protection. Obtain the names and versions of the required project approvals from the person responsible for design; do not infer class conformity from this guide. In the field, set up identification and end protection arrangements that reduce incorrect connections between lines. Also define the post-use cleaning and storage method for each duty.
Original editorial recommendation; not a clause of a standard.
Frequently asked questions
Is using stainless connections enough for marine suitability?
No. Material selection, mechanical performance and project-specific approvals are different requirements.
Source coverage
-
S017
Parker Safety Guide, Publication 4400-B.1 Parker Hannifin · accessed 2026-10-20 PDF page 2; 2.8 Routing, 2.10 Mechanical Loads and 2.11 Physical Damage | PDF page 2; 2.5 Fluid CompatibilityPDF page 2; 2.5 Fluid Compatibility | PDF page 2; 2.9 EnvironmentPDF page 3; 3.1 Component Inspection, 3.2 Hose and Fitting Assembly and 3.3 Related Accessories
-
S086
Material Selection Guide and Additional Resources Swagelok · accessed 2026-10-19 Public sections: material selection, pitting, crevice and galvanic corrosion; product-specific alloy claims not generalized