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REFERENCES
VENAIR reputation as a worldwide leader in flexible silicone tubes has caught the attention of some of the most well-known brands across many sectors:
FOOD
DANONE
NESTLE
SCHWEPPES
COCA COLA
KRONEBOURG
PHARMACEUTICAL
PFIZER
GLAXO-WELLCOME
AVENTIS
MILLIPORE
SCHERING-PLOUGH
COSMETICS
L’OREAL
NIVEA
ROC
LANCASTER
CHEMICAL
SANOFI
BAYER
HENKEL
PRECAUTIONS FOR USE
STERILISATION
All flexible hoses must be sterilized before use and must only be used for the inten-
ded purpose for which they were designed.
All hoses can be hot-air sterilized at a temperature of +250° C (+482º F) or steam
sterilized at +135° C (+275º F) and a pressure of with 3.5 bars. Recommended maxi-
mum time: 1.5 hours +135° C (+275º F). A minimum of 1 hour must be left between
successive sterilisation treatments in order for the hose to stabilise. It is important
to note that steam alters the mechanical and volumetric properties of the silicone
elastomer. We therefore recommend that all hoses are examined after 150 hours of
steam sterilization treatments. The product may suffer from the effects of hydrolysis if
the sterilisation time is exceeded.
COMPATIBILITY OF THE PRODUCTS FOR TRANSPORTATION
Ensure that the flexible hose used is chemically compatible with the product. Cleaning
products, such as caustic soda and nitric acid will not alter the quality of the product
when diluted to 5 %. The type of fluid to be transported, the usage temperature and
the maximum pH of the product must always be known. Silicone hoses are not recom-
mended for conveying abrasive products.
CRUSHING
A vehicle driving over a hose can cause the hose’s textile elements to fray under the
pressure, even if the hose does not have an inner spiral. Avoid stepping on hoses. The
sudden pressure could damage them.
PRESSURE
The pressure and temperature levels should be those indicated for each type of hose.
During use, ensure that “water hammer” that could affect the hose does not occur.
Water hammer can multiply the initially expected operating pressure by ten.
USE STORAGE
Under no circumstances should flexible hoses be used to attempt to pull heavy loads.
Avoid dragging hoses along the floor. If the hoses are temporarily out of service, they
should be stored in a clean, dry place on non-sulfur steel shelving to avoid any reac-
tions. Protect from light and ozone. Elbow adaptors of 45° or 90° must be connected
to the bypass frame to eliminate any excessive curvature of the hose.
Our flexible hoses have a useful life of between 10 and 20 times than conventional
hoses. Remember that once the hose is installed, it is a and moving element. These
hoses have been manufactured with the greatest care, especially for use in such de-
manding industries. Taking good care of them will ensure a return on your investment.
VENAIR shall not be held responsible for improper use of its hoses. Failure to comply
with the precautions for use may result in unfavorable conditions.
GOOD PRACTICE GUIDELINES
CRITERIA FOR SELECTION
Fascicle of documentation published by Afnor, September 1986.
Correspondence:
At the time that this fascicle was published, the ISO/DIN 18831 standard on the same
subject already existed. Both documents are equivalent.
Analysis:
The present fascicle is intended to help users of rubber or plastic based elastic and
flexible hoses to obtain optimal hose life by considering the different conditions of
use.
The purpose of the present fascicle is to provide users of rubber or plastic-based
flexible hoses with recommendations to enable them to maintain the hoses in a simi-
lar condition to when supplied once they are in operation and to obtain an optimal
service life by considering the conditions of use. These good practice guidelines are
comprised of two parts:
PART A: GENERAL RECOMMENDATIONS
Chapter 1 – Selection criteria
Chapter 2 – Storage conditions
Chapter 3 – Rules for use and maintenance
PART B: ADDITIONAL RECOMMENDATIONS FOR SPECIFIC APPLICATIONS
Chapter 1 – Bending radius / Abrasive products
Chapter 2 – Corrosive and aggressive products
Chapter 3 – Inflammable products
PART A: GENERAL RECOMMENDATIONS
1. SELECTION CRITERIA
1.1 When choosing a flexible hose for a certain application the following points
must be considered:
1.1.1 Pressure – Vacuum
Operational pressure and vacuum values Water hammer
1.1.2 Conveyed products
Nature, designation, concentration, working temperature. Form: liquid, gas, or solid.
In the case of the latter: granulated, density, behavior of transported solid product,
nature, speed of travel and flow of transported fluid. Frequency of use.
1.1.3 Environment
Place of use, ambient temperature, hygrometric grade, exposure or lack of exposure
to atmospheric agents and ozone. Products that may be in contact with the end of
the flexible hose.
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