| Fluid or Chemical Compatibility | Water, detergents, oils, solvents, acids, alkalis, coatings, or agricultural chemicals | An incompatible tube or cover can swell, harden, crack, soften, or contaminate the conveyed fluid. | Verify the hose material against the exact fluid, concentration, temperature, and exposure time. Use a chemical-resistance chart from the hose manufacturer. |
| Working Pressure | Common industrial spray hoses are available with working-pressure ratings from approximately 10 bar to more than 400 bar, depending on construction and size. | Insufficient pressure capacity can cause premature failure, leakage, or hose rupture. | Select a hose whose working-pressure rating exceeds the maximum system pressure, including pressure spikes. Never use burst pressure as the operating limit. |
| Temperature Range | Many general-purpose rubber and thermoplastic hoses operate roughly between −40°C and +100°C; specialized designs may support higher temperatures. | Excessive heat accelerates aging, while low temperatures can reduce flexibility and increase cracking risk. | Base the selection on both the fluid temperature and the surrounding ambient temperature. Account for short-term temperature peaks. |
| Hose Inner Diameter | Typical industrial spray hoses range from about 6 mm to 50 mm inside diameter, with larger sizes available for high-flow systems. | A diameter that is too small increases pressure loss and reduces flow; an oversized hose can add unnecessary weight and cost. | Choose the diameter according to required flow rate, allowable pressure drop, hose length, and spray-nozzle requirements. |
| Flow Rate and Pressure Drop | Pressure loss increases with flow velocity, hose length, fittings, bends, and restrictions. | Excessive pressure drop can reduce spray quality, cleaning performance, and process consistency. | Calculate the required flow and pressure at the spray point rather than selecting by connection size alone. |
| Flexibility and Minimum Bend Radius | Minimum bend radius varies by hose construction; smaller-radius designs are generally more flexible but may have lower pressure or temperature limits. | Bending below the specified radius can kink the hose, restrict flow, and damage reinforcement. | Measure the tightest bend in the installation and choose a hose with a suitable minimum bend radius. Do not use the hose as a hinge at the fitting. |
| Abrasion and External Wear | Dragging, contact with sharp edges, vibration, vehicle traffic, and abrasive materials can damage the outer cover. | Cover damage can expose reinforcement and shorten service life, particularly in mobile applications. | Use an abrasion-resistant cover, protective sleeve, or hose guide where rubbing and dragging cannot be avoided. |
| Reinforcement Construction | Common reinforcement types include textile braid, synthetic fiber, wire braid, and wire spiral. | Reinforcement determines pressure capability, flexibility, crush resistance, and weight. | Use textile reinforcement for lighter-duty flexibility and wire-reinforced construction for higher-pressure or more demanding service. |
| Electrical Conductivity | Some applications require a conductive or antistatic hose, especially when flammable fluids, vapors, or electrostatic charge are present. | Static buildup can create ignition, equipment, or product-quality hazards. | Confirm the required electrical-resistance specification and ensure the complete hose assembly is properly grounded where required. |
| Fittings and Connection Standard | Connections may use threaded, quick-connect, cam-and-groove, sanitary, or flanged fittings in different dimensional standards. | Incorrect thread type, sealing method, or fitting material can cause leaks and assembly failure. | Match fitting size, thread form, pressure rating, material, and sealing method to the equipment and conveyed fluid. |
| Spray Pattern and Nozzle Performance | Spray results depend on stable pressure, consistent flow, nozzle geometry, and the hose's internal condition. | Pulsation, kinking, or excessive pressure loss can produce uneven coverage and inconsistent application rates. | Select a hose that maintains the required pressure and flow at the nozzle throughout the operating cycle. |
| Length and Handling | Longer hoses improve reach but add weight, storage requirements, pressure loss, and potential snag points. | Poor length selection can reduce operator efficiency and increase wear or handling injuries. | Use the shortest practical length, provide adequate movement allowance, and install reels, supports, or routing guides when appropriate. |
| Cleaning and Maintenance | Food, pharmaceutical, paint, and chemical processes may require flushing, drainage, or special cleaning procedures. | Residue, contamination, and blocked passages can affect product quality and operating safety. | Choose a smooth-bore hose and compatible construction where cleaning is critical. Inspect for blisters, cuts, kinks, exposed reinforcement, and fitting damage. |
| Applicable Safety Requirements | Requirements may apply to high-pressure water, hazardous chemicals, food contact, static control, or hazardous locations. | Compliance affects personnel safety, approval status, traceability, and insurance or regulatory obligations. | Review the applicable local regulations, industry standards, pressure-equipment rules, and site procedures before purchasing or commissioning the hose. |