Steam and hot fluids
Technical reference and selection guides on steam and hot fluids.
15 guides
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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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