FASTENERS & ANCHORING
Anchor Plate
Foundation Anchor Plate
Wind Turbine Anchor Plate for foundation has 2 parts: upper and lower anchor plate(embed and template ring), which are connected by splice plates and high strength anchor bolts. Splice plate is a kind of rectangle plate which has the same mechanical properties of anchor plate, usually wind turbine foundation requires anchor plate with large diameter, compared with manufacture anchor ring plate in hot rolled method, use splice plate and seperate parts of anchor plate is more economical option.
Anchor Plate Designed for Anchor Cage
There are many factors can influence the wind tower foundation configuration, wind turbine size and brand, site geotechnical conditions, etc. Wind tower cage foundation structure has to with stand compressive and uplift forces caused by strong wind forces. Before construction, investigation and research of structural and geotechnical design checks are needed.
This Drawing is designed for one of the many wind farm project.
Anchor Plate Production Process
According to the plan to buy steel plate (Q345E) → Rraw material re-inspection → Cutting (CNC programming, flame cutting) → Leveling → inspection → opening groove → cleaning and polishing → anchor plate group for tailor welding → inspection (100% ultrasonic flaw detection) → Cleaning Grinding → Appearance inspection → Leveling → Flatness Detection→ Machining → Inspection → CNC Drilling → Inspection → Sand blasting → Corrosion Protection Treatment → Inspection → Packaging → Storage.
Equivalent Steel Grades of Anchor Plate
| GB/T 1591-2018 | GB/T 1591-2008 | ISO 630-2: 2011 | ISO 630-3 2012 | EN 10025-2:2004 | EN 10025-3:2004 | EN 10025-4:2004 |
| Q355B | Q345B | S355B | — | S355JR | — | — |
| Q355C | Q345C | S355C | — | S355J0 | — | — |
| Q355D | Q345D | S355D | — | S355J2 | — | — |
| Q355NB | Q345B(nomalized) | — | — | — | — | — |
| Q355NC | Q345C(nomalized) | — | — | — | — | — |
| Q355ND | Q345D(nomalized) | — | S355ND | — | S355N | — |
| Q355NE | Q345E(nomalized) | — | S355NE | — | S355NL | — |
| Q355NF | — | — | — | — | — | — |
| Q355MB | Q345B(TMCP) | — | — | — | — | — |
| Q355MC | Q345C(TMCP) | — | — | — | — | — |
| Q355MD | Q345D(TMCP) | — | — | — | — | — |
| Q355ME | Q345E(TMCP) | — | S355MD | — | — | S355M |
| Q355MF | — | — | S355ME | — | — | S355ML |
Anchor Plate Working Principle in Anchor Cage
Equivalent Steel Grades of Anchor Plate
EN10025 S355JR, S355J0, S355J2, S355NL; ASTM A572/A572M Grade 50. Our Chinese GB/T 1591 Q355B, Q355C, Q355D, Q355NE steels are equivalent, and are acceptable by customers. According to new standard of Low Alloy High Strength Structural Steel, steel grade of Q345 has been replaced by Q355, which is equivalent to S355.
Chemical Composition of Anchor Plate
| Q355 Chemical Compostion | ||
| Component Elements Properties | Metric | US/Imperial |
| Carbon, C | <= 0.23 % | <= 0.23 % |
| Iron, Fe | 98 % | 98 % |
| Manganese, Mn | 1.35 % | 1.35 % |
| Phosphorus, P | <= 0.040 % | <= 0.040 % |
| Silicon, Si | <= 0.40 % | <= 0.40 % |
| Sulfur, S | <= 0.050 % | <= 0.050 % |
| Silicon, Si | 0.15 – 0.40 % | 0.15 – 0.40 % |
| Sulfur, S | 0.050 % | 0.050 % |
Mechanical Properties of Anchor Plate
| Steel Grade | Yield strength | Tensile Strength, Rm | ||||||||||||
| MPa | MPa | |||||||||||||
| Steel level | Quality level | Nominal Thickness or diameter, mm | ||||||||||||
| ≤16 | ＞16~40 | ＞40~63 | ＞63~80 | ＞80~100 | ＞100~150 | ＞150~200 | ＞200~250 | ＞250~400 | ≤100 | ＞100~150 | ＞150~250 | ＞250~400 | ||
| Q355 | B,C | 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 | — | 470~630 | 450~600 | 450~600 | — |
| D | 265 | 450~600 | ||||||||||||
Charpy(V-Type) Impact Test of Anchor Plate
| Grade | Quality Grade | Test Temperature, ℃ | Impact absorbtion energy, J |
| Thickness ~100mm (max) | |||
| Q345 | B | 20 | ≥34 |
| C | 0 | ||
| D | -20 | ||
| E | -40 |