From Production :
Iron manhole cover has ductile iron and casting iron , they has making a strict environmental pollution during the coal burning process . More and more governments will take policy to limits it developed .
But composite manhole cover used science production , and no pollution .
From Cost :
With the limits and high import tax on iron products , the cost and price of iron manhole cover will lost its cost competitive . Especially its heavy weight also take much more shipping cost .
Composite manhole cover take high technology will decreased its cost and has a high production effective .
From Features :
Advantages of composite manhole cover compare with other material :
1,Higher stretch resistance and bend resistance .
2,Anti-theft , no cycle value .
3,Light-weighted
4,Durable service life
5,Anti-corrision , anti-slip
6,UV-proof and V0-flammability rating
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