Marine repair teams often work with vessels, port machinery and imported equipment using different hydraulic fitting standards. BSP, JIC, DIN Metric and ORFS fittings may look similar during urgent repair, but their thread form and sealing method are different. Choosing the wrong fitting can create leakage even when the hose and crimping are correct.
Marine Fitting Standard Comparison
| Fitting standard | Sealing method | Marine use | Common mistake |
|---|---|---|---|
| BSP / BSPT | Parallel or tapered thread, washer or thread seal depending type | Industrial marine service equipment, older systems, auxiliary lines | Mixing BSPP and BSPT or using wrong seal method. |
| JIC | 37-degree flare | Mobile hydraulic equipment, deck machinery, service tools | Confusing flare seat with other cone fittings. |
| DIN Metric | Metric thread with cone, O-ring or DKO sealing face | European machines, shipyard equipment, hydraulic systems | Only measuring diameter and ignoring pitch/sealing face. |
| ORFS | O-ring face seal | Leak-sensitive hydraulic circuits | Reusing damaged O-ring or wrong face size. |
| SAE flange | O-ring flange face with bolt pattern | High-flow deck cranes, winches, hydraulic power units | Confusing Code 61 and Code 62 pressure class. |
Repair Team Workflow
- Photograph the old hose assembly before removal.
- Record hose marking, I.D., length, fitting angle and machine position.
- Identify thread and sealing face before choosing a fitting.
- Choose ferrule based on hose construction: braided or spiral.
- Record crimp diameter and final assembly length for next reorder.
Port and Shipyard Case Examples
| Case | Problem | Likely reason | Better method |
|---|---|---|---|
| Winch hose replacement leaks | Oil leaks at fitting under vibration | Wrong BSP/JIC identification or damaged sealing face | Check thread gauge, sealing face and fitting angle. |
| Imported power pack adaptor mismatch | Thread starts but cannot seal | Metric vs BSP confusion | Confirm pitch and cone/O-ring face before ordering. |
| Flange line replacement delayed | Wrong flange ordered | Code 61/62 not confirmed | Measure flange code, bolt pattern and pressure class. |
Related products: BSP / NPTF fittings, JIC fittings, DIN Metric fittings, ORFS and flange fittings.
Send fitting photos to Sigit +62 821-1900-0383.