Knowledge Center
From selection to assembly, from standards to maintenance: sourced technical guides on hose and connection technology.
215 guides
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Selecting an industrial water hose
When selecting a water hose, it must be determined whether the use is irrigation, process water, drinking water, hot water or cleaning. Under the same fluid name there are different hygiene, pressure, temperature and me…
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Safety and connections for compressed air hose
In compressed air hose, the hose and couplings are selected together; separation of the connection or rupture of the hose can cause uncontrolled movement. Working pressure, temperature, oil/moisture in the air, the lock…
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Helix reinforcement in suction and discharge water hoses
In a suction and discharge hose, the helix is one of the structural elements that helps maintain the cross-section under suction. However, the helix material or appearance on its own is not a service approval. Vacuum, p…
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Points to watch with layflat discharge hoses
Layflat hoses are products that can fold flat and take up little space when unpressurized. Selection defines the working pressure, fluid, temperature, coupling and site conditions. Using the layflat construction for dis…
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Industrial washdown hoses and service conditions
Washdown hose selection covers the water temperature, pressure, cleaning chemicals, gun connection and external environment together. Hot water, steam and high-pressure washing are not interchangeable service names. Eac…
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Selecting hoses for abrasive materials
In an abrasive material hose, the inner tube, particle type, grain size, conveying velocity and routing are assessed together. A thick inner tube on its own is not a guarantee of long life. Bends, flow restrictions and …
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Line and end connection compatibility in concrete hose
In concrete hose, the hose body, end connection and coupling system must be verified together. The same diameter or a similar coupling profile does not show that different parts will work together safely under pressure.…
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Cement and powder transfer hoses
For cement and powder transfer hose, the dry/wet state of the material, conveying method, temperature, pressure/vacuum and electrical requirements must be defined. Dry powder transfer and concrete pumping are not the sa…
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Abrasion and electrical properties in sandblast hose
In sandblast hose, abrasion resistance and electrical behavior are assessed together. The abrasive type, grain size, operating condition, nozzle and connection system must be determined. The term 'antistatic' alone does…
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Key parameters for slurry and dredging hoses
Slurry and dredging hose selection covers the properties of the solids in the liquid, density, flow rate, suction/discharge condition and mechanical movement together. The liquid being water alone does not show that a s…
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Petroleum and fuel transfer hoses
In oil and fuel hose selection, the actual chemical composition, temperature and mode of use of the product must be determined. Diesel, gasoline, biofuel blends and hydraulic oil are not the same compatibility row. In a…
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Selection checklist for tank truck hoses
A tanker transfer hose is selected together with the conveyed product, filling/unloading method, connection system, handling loads and facility safety requirements. As important as the hose's pressure rating are the sui…
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Why an LPG hose is not a general fuel hose
An LPG hose should not be treated as equivalent to a general fuel or oil hose. The product must be explicitly designed for the relevant phase of LPG, the operating condition and the mode of use. The suitability of the h…
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Service distinctions in welding gas hoses
Welding gas hoses are selected according to the gas to be conveyed and the equipment. Product suitability, connection and marking requirements are separate for oxygen, acetylene and other fuel gases. Color alone should …
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The concept of permeation in gas transfer
Permeation is the ability of a fluid to pass through the hose material at the molecular level. It is not the same mechanism as a visible hole or a connection leak. For gases, volatile or hazardous fluids, it must be add…
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Saturated vs. superheated steam in steam hose selection
When selecting a steam hose, it must be determined whether the steam is saturated or superheated. Do not automatically carry the values a product gives for saturated steam over to another steam condition; the hose assem…
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How are pressure and temperature read together in a steam line?
For a steam hose, pressure and temperature must be read together. Saturated steam has a pressure-temperature relationship; a higher temperature at the same pressure can indicate a different steam state. The pressure ref…
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Hose selection for condensate transfer
Condensate is liquid water formed by the condensation of steam. Its accumulation in a steam line must be considered separately in operation and hose assessment. Post-use drainage, recommissioning and the line geometry m…
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Oil resistance of the outer cover on steam hose
A steam hose's resistance to an oily external environment is a property separate from its inner tube in contact with steam. The product's outer cover class and the scope of oil exposure must be checked. An oil-resistant…
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The difference between hot water hose and steam hose
Hot water hose and steam hose are not the same product class. The fluid phase, pressure-temperature conditions, inner tube and assembly system are assessed together. A high temperature figure is not considered sufficien…
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Fitting and clamp systems for steam hose
Steam hose connections must be a system suitable for steam service and verified with the hose. A general hose clamp, a fitting of similar diameter or an assembly that looks sound is not sufficient. Assembly, inspection …
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Using elbows and rigid pipe at a steam line outlet
Considering a suitable elbow or rigid pipe section instead of changing direction immediately at the hose outlet can reduce tight bending of the hose. However, the new part must be designed together with pressure, temper…
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Bending and support plan for steam hose
Supports on a steam hose must carry the weight without crushing, twisting or forcing the hose to a tight radius. The load near the connection and the entire route are assessed together. A single universal support spacin…
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Protection against hot surface contact
Hot surface protection is selected for defined risks such as operator contact and external heat exposure. Adding a heat sleeve does not automatically increase the hose's resistance to the internal steam temperature. The…
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Safety questions before disconnecting a steam line connection
Before a steam connection is disconnected, energy isolation, residual pressure, temperature and trapped fluid must be assessed with a safe procedure. A valve appearing closed does not on its own prove that the assembly …
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Signs of inner tube damage in steam hose
Inner tube damage in a steam hose may be associated with unsuitable service, temperature, condensate, the usage cycle or other causes. A definitive root cause is not determined from a single image. Inner surface finding…
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How to assess blistering on steam hose
A blister on the outer surface of a steam hose is a finding that should not be accepted as normal and passed over. Permeation, ply separation or other damage mechanisms are investigated. Piercing, pressing down or cover…
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Investigation form for premature rupture in steam service
In a premature rupture, looking only at the hose brand or temperature label is not sufficient. The damage location must be matched against bending, support, flow conditions, connection geometry and the usage cycle. Repe…
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How to define a post-use procedure for steam hose
Post-use operations for steam hose cover safe isolation, management of residual fluid, proper drainage, cooling and storage conditions. The sequence and method must be taken from the facility and product instructions. A…
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Documenting the replacement decision for steam hoses
A steam hose replacement record should link the identity of the old assembly, the reason for replacement, the properties of the new assembly and the related documents. Writing only the replacement date is not sufficient…
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