FlowMarket
Where to source hoses and couplings: FlowMarket is a B2B sourcing network powered by an AI agent. You describe the assembly — bore size, working pressure, the medium with its temperature, hose standard, length, end fittings and thread standard, plus any approvals — and the AI agent matches you with verified hose manufacturers, assemblers and distributors, then requests prices and lead times from every match at once. Getting matched is free for buyers.
Sourcing hoses and couplings
A hose is rarely bought as a hose. It is bought as an assembly — a length of hose with a specific fitting crimped on each end — and the assembly is only as good as the weakest of those three parts. Get the hose right and the fitting standard wrong and you have an expensive length of rubber that connects to nothing.
That is why the ends matter as much as the bore. Thread standards look interchangeable and are not: BSP and NPT have different thread forms and sealing methods, and forcing one into the other damages both.
Hose types
Hydraulic hose
Rated by construction and working pressure under EN 853 and EN 856 or the SAE 100R series — 1SN and 2SN for general duty, 4SP and 4SH spiral types for high pressure and impulse. Specified by nominal bore, pressure, bend radius and the fitting on each end. Because these assemblies fail under pressure, they are usually replaced on an interval rather than on failure.
Industrial hose
A much wider family, defined by what it carries: water and air, chemicals, food and beverage, abrasives, fuel, or steam. Suction duties need a helix so the hose does not collapse under vacuum; delivery-only hoses do not. Food and pharmaceutical lines need certified liners, and many chemical and dry-bulk applications need electrical continuity so static cannot build up.
Couplings and fittings
- Camlock — fast cam-and-groove connection for tankers, drums and bulk transfer.
- Storz & Geka — symmetrical claw couplings common in water, fire and compressed air.
- Hydraulic quick couplers — connect under pressure without tools; ISO 7241 and flat-face types.
- Crimped fittings — JIC, BSP, NPT, ORFS and metric, permanently swaged to the hose.
What to specify when sourcing
These details decide both the assembly and the price:
- Bore & length — nominal bore DN or inches, and the length, stating whether it is end-to-end.
- Working pressure — the actual operating pressure, plus peaks and whether it pulses.
- Medium — what flows through it, with concentration; it decides the liner material.
- Temperature — of the medium and of the surroundings, including any steam cleaning.
- Suction or delivery — whether it must resist vacuum or collapse.
- Bend radius & routing — the tightest bend in the installation, which can rule out a construction.
- End fittings — type, thread standard (BSP, NPT, JIC, ORFS, metric), size and gender, per end.
- Standard — EN 853/856, SAE 100R, or the industrial hose standard that applies.
- Approvals — food contact (FDA, EC 1935/2004), drinking water, ATEX, electrical continuity.
- Quantity & assembly — how many, and whether you want hose by the metre or finished assemblies.
Working pressure, burst pressure and the safety factor
Hose datasheets carry two pressure figures and only one of them is a rating. Working pressure is the maximum the hose may see in service; burst pressure is where it fails on test, typically four times higher for hydraulic hose. The safety factor between them is not headroom you are entitled to spend — it covers impulse, ageing, temperature and the wear the hose picks up in service. Selecting on burst pressure because the number is bigger is a genuinely dangerous mistake, and it is common. Temperature erodes the same margin: most rubber hoses lose a substantial part of their pressure rating as they get hot, so a hose rated at 20 °C is not rated the same at 100 °C. Two more things worth stating in the enquiry, because they are the usual causes of an assembly that arrives and cannot be fitted: the tightest bend radius in the actual routing, and whether the length you quoted is end-to-end over the fittings or the hose alone. Suppliers assume different conventions, and a short assembly is scrap.