Views: 500 Author: Curry Publish Time: 2025-04-22 Origin: www.fcst.com
1. Duct-related issues
A. Blocked or deformed ducts：There are some foreign objects blocking the ducts, or the ducts themselves may have been deformed due to external forces, preventing the fiber cable from passing through smoothly. For example, in some old ducts, there might be accumulations of debris like gravel and soil, or the ducts may have been flattened or bent, affecting the blowing process.
B. Rough inner walls of ducts：If the inner walls of the ducts are not smooth enough, with burrs or protrusions, it will increase the friction between the fiber cable and the duct walls. This may lead to damage to the outer sheath of the fiber cable and even cause the fiber cable to get stuck inside the duct.
2. Fiber cable issues
A. Poor fiber cable quality：If the fiber cable does not meet the requirements for blowing in terms of outer diameter, material, etc., it may twist or fold during the blowing proces. For instance, if the outer diameter of the fiber cable is too large or too small, it will affect its passage through the duct. An oversized cable may cause excessive friction, while an undersized one may fail to form a proper seal with the duct walls, affecting the blowing effect.
B. Moisture and contamination：The fiber cable may get damp or contaminated with dust, oil, and other pollutants during storage, transportation, or construction。A damp fiber cable can increase friction during blowing and may even degrade the performance of the optical fibers inside. Contaminated cables may introduce pollutants into the ducts during blowing, affecting the installation and signal transmission quality of subsequent fiber cables.
3. Blowing equipment and operation issues
A. Equipment malfunction：Failures in the air compression system or sealing system of the blowing machine can lead to insufficient or unstable air pressure。For example, worn piston rings or aged seals in the air compressor may prevent the air pressure from reaching the required level, affecting the blowing speed and distance of the fiber cable.
B. Improper operation：Inexperienced operators or those who do not follow the correct operating procedures can cause problems. For example, improper control of the blowing speed may twist the fiber cable if it is too fast, or reduce construction efficiency if it is too slow. Incorrect blowing direction may cause the fiber cable to deviate from the intended path inside the duct and even get stuck.
4. Environmental factors
A. Adverse weather conditions：Performing fiber cable blowing in extreme weather conditions such as high temperature, high humidity, or low temperature can have negative effects on both the fiber cable and the duct。For example, in high-temperature environments, the outer sheath of the fiber cable may soften, reducing its strength and wear resistance. In high-humidity conditions, condensation may form inside the ducts, increasing the friction and moisture risks for the fiber cable. In low-temperature conditions, the fiber cable may become brittle and prone to breakage.
B. Electrostatic interference：The blowing process can easily generate static electricity, especially in dry and low-humidity conditions。Static electricity can attract dust and particulates from the air, leading to contamination of the fiber cable endfaces or connectors, which can degrade signal transmission quality and even damage the outer sheath of the fiber cable.
In Summary, during the process of optical cable air blowing construction, there are many factors that will affect the smooth progress of optical cable air blowing. To ensure everything goes smoothly, the following points must be achieved:
1- The laying of telecommunication HDPE microduct meets the construction standards and requirements
2- The outer wall of the optical cable is smooth and clean
3- The inner wall of the HDPE microduct is clean and unobstructed
4- Professional training of construction personnel on optical cable air blowing equipment
5- Connect the HDPE microduct correctly by microduct connectors.
6- Use an aftercooler: atmospheric air contains water vapor, and high humidity can affect compressed air equipment. To ensure efficient operation, it's crucial to maintain a dry environment. Compressing air concentrates moisture, so using an air compressor aftercooler is an effective solution.
FCST - Better FTTx, Better Life.
At FCST, we manufacture top-quality microduct connectors, microduct closure, telecom manhole chambers and fiber splice boxes since 2003. Our products boast superior resistance to failure, corrosion, and deposits, and are designed for high performance in extreme temperatures. We prioritize sustainability with mechanical couplers and long-lasting durability. Welcome to contact us for any questions or inquires.
