Short answer
Defining the A and B ends of a hose assembly separately prevents the two different connections of the same hose from being confused. For each end, the connection family, size, orientation, sealing, material and, where applicable, the elbow angle must be recorded.
Technical explanation
Hose and fitting selection are made together; the hose inside diameter alone does not define the assembly. The two ends can be of different standards or materials. In assemblies with elbows, the relative orientation of the ends is also required. The proposed A/B recording approach aims to carry this information in the same form from the order through to production and delivery inspection. This is an in-house recording approach; it is not presented as a mandatory naming convention of all standards.
Topic-specific checkpoints
| Item | Description |
|---|---|
| A end | Full definition of the reference connection |
| B end | Independent definition of the opposite connection |
| Orientation | Elbow angle and viewing convention |
| Revision | Tracking of changes |
How to evaluate it in practice
Fix the A end on a reference drawing and define the B end using the same viewing convention. Use full definitions, for example 'JIC female 37°' for A and 'BSPP male, specified sealing type' for B; write the sizes separately. After the technical data is approved, store product codes separately from free text. If the ends change, open a new revision without deleting the old record. In production inspection, verify that the correct part is fitted to the correct end and that its orientation matches the drawing. Do not open a production order with angle, orientation and overall length until the A/B end reference is locked on the drawing.
Original editorial recommendation; not a clause of a standard.
Frequently asked questions
If both ends are the same size, is a single line enough?
The family, sealing or angle may differ. Keeping the two ends in separate fields reduces uncertainty in production and inspection.
Source coverage
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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; 2.7 SizePDF page 2; 2.5 Fluid CompatibilityPDF page 3; 3.1 Component Inspection, 3.2 Hose and Fitting Assembly and 3.3 Related Accessories
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S021
Selecting a hose assembly? Remember STAMPED Swagelok Bangalore · accessed 2026-10-19 Size; Temperature; Application; Material; Pressure; End Connections; Delivery