Short answer
A manufacturer approval must be based on an explicit document showing that a specific product or combination has been evaluated for specific conditions. A general catalog statement, a sales conversation or data for a product of another size must not be extended to all applications.
Technical explanation
In manufacturer safety guides, correct hose and fitting selection and verification of the application conditions are important. The scope of an approval can vary according to product code, size, fluid, temperature, pressure and assembly method. A general presentation of a product family and the verification of a specific combination are not the same thing. Estimated numerical values must not be added to fill in conditions not stated in the source.
Topic-specific checkpoints
| Item | Description |
|---|---|
| Product | Code, size and combination |
| Condition | Fluid, temperature, pressure and movement |
| Document | Source, date, version and limitations |
| Change | New circumstances that could affect the approval |
How to evaluate it in practice
Write the product codes and the actual conditions on a single form in the technical confirmation request. Archive the response with its date, authorized source and scope. Do not turn conditional approvals into unconditional product properties. When the process or a component changes, re-evaluate whether the previous approval is still valid. On the website, do not use the product link below a general guide in place of a technical approval; a commercial relationship and physical suitability are separate data types.
Original editorial recommendation; not a clause of a standard.
Frequently asked questions
Does a sales representative's general comment count as a technical approval?
The scope and basis of the claim must be clear. For specific service conditions, a documented technical confirmation is requested.
Source coverage
-
S017
Parker Safety Guide, Publication 4400-B.1 Parker Hannifin · accessed 2026-10-20 PDF page 3; 3.1 Component Inspection, 3.2 Hose and Fitting Assembly and 3.3 Related Accessories | PDF page 2; 2.2 Pressure | PDF page 2; 2.4 Temperature | PDF page 3; 2.17 Radiant Heat | PDF page 2; 2.5 Fluid Compatibility
-
S021
Selecting a hose assembly? Remember STAMPED Swagelok Bangalore · accessed 2026-10-19 Size; Temperature; Application; Material; Pressure; End Connections; Delivery