IEEE 1591.2:2017 pdf free download – IEEE Standard for Testing and Performance of Hardware for All-Dielectric Self-Supporting (ADSS) Fiber Optic Cable
3.1 ADSS cable and hardware system definitions
breaking strength: The calculated maximum tensile load that the cable is estimated to reach upon mechanicalfailure. Mechanical failure is primarily associated with the cable strength member however other cablecomponents may contribute to the overall strength. The maximum rated cable load is typically less than 60%of the breaking strength.Syn: breaking tension.
every day tension(EDT): The final tension with no ice and no wind at the average annual mean temperaturethroughout the year. This temperature is assumed as 16 °C(60 °F).This number is often used in specifyingmotion control devices such as vibration dampers.
hardware:Attachments or fittings that are in direct contact with the cable.
maximum hardware safety tension (MHST): This is the maximum hardware tension rating for dead-endhardware to hold all-dielectric self-supporting cable that can exceed the cable maximum rated cable load(MRCL) rating.Maximum hardware safety tension is greater than the maximum loaded tension (MLT) orMRCL and may approach the cable estimated breaking strength. If the hardware tension rating is less than orequal to the cable MRCL then the MLT terminology is used.
4.3.4 Corrosion resistance protection
Adequate corrosion resistant treatment per 4.4 shall be applied to all ferrous materials as agreed upon bythe customer and manufacturer. Special requirements are necessary for threaded fasteners. If no otherspecifications are referenced, ferrous materials shall be hot-dip galvanized in accordance with ASTMA153 orISo 1461, or equivalent.
4.4 Environmental corrosion
The hardware shall be able to withstand the natural elements that exist at its installation location.The corrosivenature of installation sites can vary vastly from location to location.Therefore, some hardware designs aremore suitable for certain locations than other designs.High corrosion sites such as high-moisture zones,salt water zones,industrial corrosion zones,volcanic sulfur zones, or combinations of zones require specialprotection from corrosion for the hardware.
4.4.1 Low-corrosion installation sites
These areas are defined as installation locations that have low or very low levels of corrosive matcrials suchas moisture, salts, industrial pollution, volcanic pollution, naturally occurring atmosphericlanimal corrosivepollutants, or any combinations of these materials. Care shall still be taken when considering hardware thatmay be affected by other corrosive or damaging elements such as wind-blown sand.
ln general, most types of ADSS hardware defined in this standard can be installed in low-corrosion installationsites. These includec, but are not limited to, designs of similar and dissimilar materials such as aluminum,galvanized steel, stainless steel, brass, or copper.
4.4.2 High-corrosion installation sites
These areas are defined as installation locations that contain high or very high levels of corrosive materialssuch as moisture，salts，industrial pollution，volcanic pollution，naturally occurring atmospheric/animalcorrosive pollutants,or any combinations of these or other non-listed corrosive materials. Care shall betaken when considering hardware that may be affected by additional corrosive or damaging products such asagricultural aerial spraying, wind-blown salt and sand, and burning carbons from petrochemical activities,burning agricultural crop fields, forest fires, etc.
Corrosion resistant hardware (CR-hardware) shall pass the qualification tests as described for respectivehardware in 5.5.2.3.5,5.5.3.3.7,5.5.4.3.3, and 5.5.6.3.2.
Not all types of hardware defined in this standard can be installed in high corrosion installation sites. Onlydesigns that have passed the appropriate CR-hardware corrosion qualification tests can be installed in theselocations. This generally includes, but is not limited to, designs that are made of complete or nearly completesimilar noble materials as shown in the chemical electromotive series, such as all aluminum, some stainlesssteels, coated galvanized steel, brass, or copper.Unless they pass the appropriate corrosion qualification test,designs of dissimilar materials as shown in the chemical electromotive series are in general not allowed.Galvanized steels are not normally acceptable in high-corrosion zones; hence the user and manufacturer shallbe clear on the limitations of galvanized hardware being supplied for use in high-corrosion zones. New ornovel designs can be acceptable if they allow the hardware to pass the appropriate corrosion qualification test.