Quick and economic installation by saving labor and materials. COD laying in-between two manholes may be done by single laying operation regardless of built-in multiple numbers of inner ducts and length in-between two manholes.
Saving working period considerably.
Saving Fiber Optic Cable owing to perfect alignment of inner duct straight, while insertion of inner duct through installed PVC ducting system may cause twist consuming more length of Fiber Optic Cable.
Ø111mm of COD is readily built-in of 5 inner ducts of Ø28mm, while the conventional PVC ducting system is limited to only three (3) inner ducts in the equivalent diameters: potentially saves cost greatly (approx. 170% of capacity efficiency).
Reducing excavation quantities, as the required trench width is being required much less than that of the conventional method (less than 60% of conventional system).
Less traffic troubles at job site and its adjacent area in appreciation of:
Considerably less working period in comparison to the conventional method.
Not many materials required to be mobilized and stored at job site, but transported in reels keeping job site clean and neat.
Less transportation requirement for the disposal of removed materials owing to the reduced excavation quantities; and
Less transportation requirement for sand transportation to job site for padding at the excavated trench bed and above the laid duct.
No inner ducts mobilization after installation of Outer Duct is required.
Normal operation allows single laying up to 500 meters, while special operation with special design of COD trailer allows as much as over 1,600 meters in single laying operation. Which saves both coupling or connection materials and labors greatly.
Moving of COD roll in the job site and easy installation thereof by means of releasing COD from reel are with least manpower owing to the benefit of light-weight and smooth releasing.
The maximum diameter of Fiber Optic Cable to insert into the inner duct is as much as 80% of Inner Duct diameter while conventional PVC can only house up to 50% at maximum (efficiency: 160%).
No need to construct additional manholes at the curving points, while the conventional products need either such constructions or special bending.
Pre-lubrication or Silicon coating: COD does not necessarily need neither pre-lubrication nor Silicon coating inside of inner duct to facilitate easy insertion of cables owning to perfect alignment of inner ducts.
However, should clients require such Silicon Coating, we are ready to manufacture and supply our product as requested by any client.
Models: Various models of COD are available depending on requirements for numbers and diameters of inner-ducts. Customer designed combination of inner ducts as well as dimension is acceptable.
Color scheme of inner-ducts: Customer-designed colors are acceptable. The available Colors of ready-made products are blue, green, yellow, white, scarlet, purple and black.
Insertion of Cable into the installed duct: Air Jetting method (Super Jet) will insert the cables into the installed ducts regardless of the intervals of manholes.
Thermal expansion & contraction: Thermal expansion and contraction of outer ducts are comparatively lower than that of conventional ducting system, and stay at the same rate owing to the equivalent raw materials of both inner and outer ducts.
COD maintains good flexibility allowing arc bending manually up to 90 degree or more at the even angle, and does not require any particular tools for bending or straightening.