body text
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 (Appearance) |
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 |