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General specification

The official test reports from the Korea Testing & Research Institute, a State Institute, performed for the approval for Korea Industrial Standard backs up the benefits of COD as follows:

Item Specification/Performance
a. Material Polyethylene (HDPE)
b. Length No limit, but 500m to 1,000m for practical use.
Customer's order-length is acceptable.
c. Flexibility Free bending up to any degree by man-force. (Provide much better resistance & stability against earthquake compare to the conventional duct owing to sufficient flexibility and elongation nature).
d. Compressive Load < 292Kgf/CM2
e. Heat Resistance -0.4% (at <110℃)
g. Thermal Deformation Factor <3%
h. Tensile Strength 321Kgf/CM2 (at 5% deformation of outside diameter).
i. Friction Factor <3%
j. Heat Transforming Factor <3% at being stored 60 minutes at 110℃
k. Impact Test Passed (Free from distortion, twist and tear.)
l. Bending Performance Bendable up to -20℃ temperature
m. Chemical Resistance
Test from Solution form of the following Chemicals
No defects at: 40% of HNO3
No defects at: 40% of NaOH
No defects at: 30% of H2SO4
No defects at: 10% of NaCl
n. Voltage Resistance: AC 2,000V (< 15 minutes)
o. Insulating Resistance: < 200M Ohm