angel electric transmission line tower
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Specification of angel electric transmission line tower
| Design | |||||
| 1. Voltage grade | under 500KV | ||||
| Structure Steel | |||||
| High Tensile Steel | Mild Steel | ||||
| 2. Grade | GB1591: Q345B, Q345C,Q3455D | GB700: Q235B, Q235C,Q235D | |||
| EN10025:S355JR, S355J0, S355J2 | EN10025:S235JR,S235J0,S235J2 | ||||
| ASTM A572 Gr50 | ASTM A36 | ||||
| 3. Tension strength (Mpa) | 470~630 Mpa | 360~510 Mpa | |||
| 4.Yield strength (t≤16mm) (Mpa) | 345 Mpa | 235 Mpa | |||
| 5. Elongation (%) | 20 | 24 | |||
| 6. Sharpy V-notch Test | 27J(20°C) | Q345B/S355JR | 27(20°C) | Q235B/S235JR | |
| 27(0°C) | Q345C/S355J0/A572 Gr50 | 27(0°C) | Q235C/S235J0/A36 | ||
| 27(-20°C) | Q345D/S355J2 | 27(-20°C) | Q235D/S235J2 | ||
| Bolts & Nuts | |||||
| 7. Grade | Grade 4.8, 6.8, 8.8 | ||||
| 8. Standards for mechanical properties | |||||
| 8.1 Bolts | ISO 898-1 | ||||
| 8.2 Nuts | ISO 898-2 | ||||
| 8.3 Washers | ISO 6507-1 | ||||
| 9. Standards for Dimensions | |||||
| 9.1 Bolts | DIN7990/DIN931/DIN933 | ||||
| 9.2 Nuts | ISO4032/ISO4034 | ||||
| 9.3 Washers | DIN7989/ DIN127B/ISO7091 | ||||
| Marking | |||||
| 10. Method of marking of the members | Hydraulic Press Stamping | ||||
| Welding | |||||
| 11. Method | CO2 Shielded Arc Welding & Submerged Arc Welding(SAW) | ||||
| 12. Standard | AWS D1.1 | ||||
| Galvanizing | |||||
| 13. Galvanization standard of steel sections | ISO 1461 or ASTM A123 | ||||
| 14. Galvanization standard of bolts and nuts | ISO 1461 or ASTM A153 | ||||
| Test | |||||
| 15. Factory test | Tensile test, Elements analysis, Sharpy V-notch test(impact test), Cold Bending, Preece test, Hammer test | ||||
| 16. Type test | Type Test(IEC 60652:2002) | ||||
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