Triple weathering protection system SMC Square Manhole Cover 300x300mm

1. Excellent electrical insulation and smart grid adaptability

The volume resistivity of SMC material is > 1 × 10 ^ 14 Ω · cm, and the breakdown voltage intensity is ≥ 15kV/mm, which can completely block the current conduction. It is especially suitable for live scenes such as urban comprehensive pipe corridors, high-voltage substations, and rail transit power supply systems to avoid leakage safety accidents caused by manhole cover damage. At the same time, it meets the high standard requirements for insulation protection of smart grid equipment, and can achieve zero signal interference when used with underground cable monitoring systems, providing safety for the construction of new power systems.

2. Full-band electromagnetic compatibility and precision equipment friendliness

Using glass fiber reinforced non-magnetic composite material with magnetic permeability < 1.005μ, completely eliminates the eddy current effect caused by traditional metal manhole covers. In sensitive areas such as 5G base stations, airport navigation stations, and medical imaging centers, communication signal attenuation can be avoided (measured signal fidelity > 99.7%), and precision instrument measurement accuracy can be guaranteed. Passed EMC Level 3 certification, suitable for intensive deployment scenarios of smart city IoT sensing devices.

3. Triple weathering protection system

• Chemical corrosion protection: passed the ASTM B117 salt spray test for 2000 hours without corrosion, resistant to acid and alkali medium erosion with pH 3-11, suitable for extreme environments such as coastal salt spray, industrial acid rain and chemical plant areas

• Physical erosion protection: The surface nano-modified coating achieves UV8 anti-aging (> 25-year yellowing index Delta E < 2), and no structural deformation under temperature difference of -50 ° C to 150 ° C

• Biological corrosion protection: add compound anti-mildew and bacteriostatic agent, the antibacterial rate is > 99%, effectively preventing microbial degradation

4. Lightweight structural design and engineering economics

The density is only 1/4 (1.8g/cm ⊃3;) of the cast iron manhole cover, which can be transported and installed by a single person, reducing the construction labor cost by more than 30%. The modular assembly structure supports rapid maintenance, and the maintenance efficiency is improved by 50%. Passed the GB/T23858-2017 B125 load certification, the bearing capacity is up to 25 tons, meeting the traffic needs of heavy vehicles on urban main roads.