Wholesale Hydraulic Hose Assemblies from China
The hydraulic hose assembly is a pressure vessel in flexible form: a reinforced tube carrying oil at pressures that turn a failure into a job site incident. It is sold as a class, SAE 100 or EN 853 and beyond, and the class is a promise about wire reinforcement, pressure and impulse life that the factory either honours or doesn’t.
The failures: hose built a wire layer light under a class marking, crimps that hold until the tenth pressure cycle and then release, and skive and ferrule combinations that weep. A hydraulic failure costs downtime at best and safety at worst, which puts this category at the top of the documentation discipline list.
All three are testable. The category context is in our industrial supplies overview.
Hose class, fitting and the crimp
Hose is a tube, a reinforcement and a cover. The class names the reinforcement: one wire braid, two wire braid, four and six wire spirals, each with its pressure range and impulse expectation. The cover resists abrasion and oil, and its quality decides how the hose ages on the machine.
The assembly is hose plus fittings, and the crimp is where the two become one pressure vessel: ferrule geometry, crimp diameter and the skive state are all calibrated numbers from the hose and fitting maker. Mixing hose from one maker with fittings and crimp specs from another is the industry’s classic shortcut, and it voids the engineering.
Specifications and minimum order
Wire and rubber prices move with raw materials, so live figures come with the quotation. Fix these points.
| Specification | What to confirm before you order |
|---|---|
| Hose class | SAE 100 or EN class named, with the wire layers verified |
| Pressure | Working and burst pressures stated with the temperature note |
| Fittings | Fitting family and thread standard, matched to the crimp spec |
| Crimp | Crimp diameter and skive state per the maker’s table |
| Impulse test | Cycle standard at pressure, run on bulk assemblies |
| Lengths | Cut lengths and tolerances, or bulk hose plus fittings |
| Minimum order | Hundreds per class and fitting family in practice; crimp tooling and wire batches set the floor |
Our minimum order is 1 piece, so a crimped, impulse tested sample is approved before any production commitment. The production minimum follows the class and fitting family, and we confirm it against your specification. Our sourcing service keeps hose, fittings and crimp specification under one maker wherever possible.
One maker, one crimp table
The single most valuable rule in this category: the hose maker’s crimp table applies to that maker’s hose with that maker’s ferrules. Assembly plants that mix brands guess, and guessing shows up as weep at the tenth cycle. We keep the chain single sourced per assembly and verify the crimp diameter against the table on bulk units.
Impulse testing is the second spine: pressurise the assembly through thousands of cycles at the class pressure and see what survives. The test is standard for class certification and run on bulk units for serious orders. Our quality assurance service writes both into the order.
What belongs in the purchase order
- Hose class with wire layers verified by cut sample
- Working and burst pressure with the temperature reference
- Fitting family, thread standard and the crimp table referenced
- Crimp diameter and skive state as checked numbers
- Impulse cycle standard run on bulk assemblies
- Lengths, tolerances and marking per class
Checks that catch the repeat failures
- Cut sample. Cut a bulk hose and count the wire layers against the class; the promise is structural.
- Crimp measure. Measure crimp diameter on bulk assemblies against the maker’s table.
- Impulse test. Cycle bulk assemblies at class pressure; ferrule release and weep show before the field does.
- Burst sample. Burst one assembly per batch to verify the pressure claim.
- Marking check. Verify the class marking on the cover matches the cut sample and the paperwork.
These checks are standard work in a pre shipment inspection, and our factory inspection service covers hose and fitting plants. For the fuller method, see our pre shipment inspection guide.
Frequently asked questions
Why does the crimp table matter so much?
Because the crimp is the pressure joint between hose and fitting, and its diameter is calibrated to that maker’s materials. A correct crimp is a permanent joint; a guessed one is a countdown. We verify the diameter on bulk assemblies as a standard line.
Can we buy hose and fittings separately?
Yes, for workshops that crimp in house, and the assembly discipline moves to your bench. For finished assemblies, keep hose, fittings and crimp spec under one maker. Our minimum order is 1 piece for sampling either route.
What test predicts field life best?
Impulse cycling at class pressure. It stresses the crimp joint and the reinforcement the way the machine does, and a batch that survives the standard cycle count is the batch that behaves on the job site.
Request a quotation
Send the hose classes, fitting families and lengths. We come back with factory options plus the workable minimum within two business days.
