Knowledge Center
From selection to assembly, from standards to maintenance: sourced technical guides on hose and connection technology.
215 guides
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How to read a chemical compatibility table
A chemical compatibility table is a pre-screening source; on its own it is not approval for use of a finished hose assembly. The fluid's concentration, temperature, contact time and the seal/fitting materials along with…
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Recording concentration and temperature in chemical transfer
Chemical suitability is assessed based on concentration, temperature, contact time and mode of use in addition to the chemical's name. A material that appears suitable in a table may not give the same result at a differ…
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How to select hose and seal together for solvent transfer
In solvent transfer, the seals, connection metal and, if necessary, electrical properties are assessed as much as the hose inner tube. A material appearing resistant to a solvent does not show that the whole assembly is…
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Requesting manufacturer approval for chemical mixtures
For mixtures, each component appearing suitable individually does not prove that the mixture is also suitable. The actual composition, ratio, temperature and mode of contact must be communicated to the manufacturer. Ins…
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Washing and cross-contamination risk in chemical transfer
The cleaning method must be suitable for the hose and must also meet the requirements of the next product to be conveyed. Removing visible dirt does not on its own prove that the risk of cross-contamination has been eli…
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How to assess a conformity document for food hose
A food conformity document must be read together with which product, which material and which contact conditions it was issued for. The manufacturer, product code, regulatory basis, food type, temperature and duration m…
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Selection for fatty food and alcoholic beverage transfer
Suitability for fatty foods and products containing alcohol should not be considered the same as general water-based food service. The food type, fat/alcohol content, temperature, duration and cleaning cycle must be spe…
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How do CIP and SIP conditions affect hose selection?
CIP refers to the cleaning-in-place approach and SIP to sterilization-in-place. In addition to the production fluid, the hose and seals must also meet the chemical, temperature and duration conditions of these cycles. T…
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Checklist for taste- and odor-sensitive applications
Taste and odor assessment is a quality topic separate from, but related to, food contact suitability. The material, previous use, cleaning agent and storage conditions are examined. Appearing odorless or having a genera…
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Dead volume in hygienic fitting and hose joints
Hygienic connection selection is not just about stainless material or an easily removed clamp. The internal passage, seal placement, gaps, drainage and cleanability are assessed together. Two parts being connectable doe…
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Documents required for drinking water hoses
When selecting a hose for drinking water, the country where the product will be used, the water temperature, the contact condition and the product code covered by the document must be determined. General food-contact su…
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Questions for a hose specification in pharmaceutical processes
In a pharmaceutical and bioprocess hose specification, the fluid, the cleaning/sterilization cycle, material traceability, particulates and process quality requirements are defined together. A biocompatibility or materi…
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Hose outer surface in cleanroom applications
In cleanroom use, the hose's suitability for the internal fluid is evaluated separately from particle generation in the surrounding environment, cleanability and packaging requirements. A smooth or light-colored outer s…
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Single-use and reusable transfer lines
The choice between single-use and reusable hose systems is made according to the intended use of the process and the validation approach. A single-use design should not be assumed to be cleanable and reusable; nor shoul…
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Food-grade claims versus approval of the finished hose
A food-grade material and a finished hose assembly suitable for a food application are not the same thing. The inner tube, seal, fitting, assembly, cleaning and actual service conditions must be evaluated together. The …
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Basic construction of thermoplastic hydraulic hoses
A thermoplastic hydraulic hose is a hose family in which a thermoplastic inner tube and outer cover are combined with suitable reinforcement. Selection is made not only on the basis of light weight or outside diameter, …
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Routing twin thermoplastic hoses
A twin hose can make it easier to route two lines together; however, the fact that the lines are joined does not eliminate the risk of torsion, friction or incorrect bending. The length of the ends to be separated and t…
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Thermoplastic hoses in paint and solvent applications
When selecting a paint and solvent hose, the name of the paint alone is not sufficient. The solvent composition, cleaning fluid, temperature, pressure and the electrical requirements of the application must be evaluated…
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Micro hoses and measuring lines
A micro measuring hose is a small-diameter connection used to carry a measuring point to a pressure gauge or sensor. It is not a scaled-down equivalent of the main power line; measurement accuracy, response time, pressu…
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Reinforcement and outer cover in thermoplastic hoses
In a thermoplastic hose, the reinforcement and the outer cover do not perform the same function. The reinforcement relates to pressure and mechanical loads; the cover manages contact with the external environment. A cov…
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PVC hose types and their basic uses
PVC hose is not a single product type. Products with braided or spiral reinforcement or with different wall constructions are designed for different tasks. A transparent appearance or the name PVC does not guarantee pre…
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Selecting steel spiral PVC hose
In steel spiral reinforced PVC hoses, the spiral is a structural element that contributes to the shape stability of the hose. The presence of a spiral alone does not mean resistance to full vacuum or reliable electrical…
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Selecting rigid PVC spiral hose
Rigid PVC spiral reinforced hoses are defined by a flexible wall and a spiral structure that supports the shape. Suitability for suction or light material transfer is determined not from the appearance of the spiral but…
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Reading technical values for transparent braided PVC hose
In a transparent braided hose, the visible braid shows the reinforcement construction; it does not on its own determine the permissible working pressure. The manufacturer limits given together with the product's size, t…
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Evaluating the effect of temperature on PVC hose
The catalog pressure of a PVC hose is meaningful together with the temperature condition stated in the catalog. For hotter operation, the permissible pressure or vacuum must be taken from the derating table of the produ…
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Abrasion and flexibility in PU suction hoses
PU hose selection should not be based solely on the name polyurethane or on an abrasion claim. The conveyed particles, velocity, temperature, moisture, wall construction and motion are evaluated together; the performanc…
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Specifying electrical properties for dust suction hoses
The electrical requirement of a dust suction hose cannot be inferred from the hose color or from a visible metal spiral. The defined electrical property of the hose, the end fittings and the facility's explosive dust ri…
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Temperature and vacuum in ventilation hoses
In ventilation hose selection, the suction or discharge condition, diameter, length, bends and any conveyed vapors or particles are as important as the air temperature. A lightweight duct hose is not by itself a compres…
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Hydrolysis and environmental conditions in PU hose
Hydrolysis resistance in PU hoses is not a single property common to all polyurethanes. Formulation, moisture, temperature and exposure duration all matter; the hydrolysis and microbial resistance information the manufa…
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Hose selection for chip and granule transfer
Hose selection for chip and granule transfer is made according to particle size, shape, sharpness, temperature and flow conditions. Abrasion resistance or nominal diameter alone is not enough to determine the suitabilit…
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