ISO 8331:2016 pdf free download.Rubber and plastics hoses and hose assemblies Guidelines for selection, storage, use and maintenance
Tuyaux etfiexibles en caoutchouc et en plastique — Lignes directrices pour Ia selection, le stockage, l’utilisation et Ia maintenance.
5.8 Automotive hoses
Hoses and hose assemblies used on automobiles are exposed to, and should be made resistant to or protected from, hostile environments, such as:
a) the conditions of their location, for example under the bonnet (hood), where they can come into contact with fuel oils, lubricating oils, battery acid, etc., be exposed to heat from the engine or be exposed to an ozone-enriched atmosphere;
b) the conditions in which the vehicle may be required to operate, such as extremes of temperature and humidity or splashing with sand, mud, gravel, snow, ice, etc.;
c) movements between parts of the vehicle to which the hoses or hose assemblies are connected, and vibration.
In the conditions given above, it is recommended that the hoses and hose assemblies be protected by shields wherever possible. Where the installation involves severe bends or where the fixing points are in different planes, the use or formed (shaped) hose should be considered. Hoses installed at bend radii less than that specified in the hose standard are liable to early failure. Care should be exercised to ensure that the hose is not under tension or twisted and that there is sufficient clearance between the hose and adjacent components. Where clearance exists under static conditions, it should be established that the dynamic operating conditions of the vehicle do not subject the hose to vibrations or other movements causing contact with hot spots or rubbing against other components. The length of the hose or hose assembly should be the correct length required to satisfy these conditions and, when needed, the hose should be supported using correctly positioned clamps.
The following special points should also be considered:
Coolant hoses should be sufficiently flexible to ensure that the radiator connection is not subjected to excessive stress. ISO 8331:2016 pdf free download.
Tags: Rubber and plastics hoses
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ISO 8600-1-2013 pdf free download.Endoscopes – Medical endoscopes and endotherapy devices – Part 1: General requirements. 6 Marking 6.1 Minimum marking Iach individual endoscope or endotherapy device shall have the lollowing minimum marking: a) model number and/or other mark sufficient to identify the endoscope or endotherapy device and its manufacturer; b) maximum insertion portion width, minimum instrument channel width, working length, field of view and/or direction of view where such identification is necessary for the intended use of the endoscope or endotherapy device. The Insertion portion width and instrument channel width units shall be in millimetres. The insertion portion width and instrument channel width can also be marked in French size as defined in 3.5, shown by either ‘Fr or an encircled number; c) wherever reasonable and practicable. the endoscope or endotherapy device and detachable component(s) shall be identified in terms of lot numbers or serial numbers, etc. 6.2 Marking legibility The marking shall remain legible over the lifetime of the device when the endoscope or endotherapy device is used, cleaned, disinlected, sterilized and stored in accordance with the instruction manual. 6.3 Marking exceptions When marking on the endoscope or endotherapy device or detachable component(s) is impossible to achieve due…
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