Cast iron manhole cover,national or EN12R standard. used on road covering or deep well in the home, preventing the people or objects from falling. they are Widely used in urban construction, municipal, water supply and drainage, electricity, telecommunications, automotive, railway, airport and other fields.
| mm/specification（mm） | material | grade | breaking load |
| #200,300,400,500,600,700,800,900,1000 |
ductile cast iron | B125 | >125kn |
| #300,400,500,550,600,700,800,900,1000 | C250 | >250kn | |
| #400,500,550,600,700,800,900,1000,1100 | D400 | >400kn | |
| #550,650,950,1050,1150 | E600 | >600kn | |
| #630,730,830,930 | F900 | >900kn | |
| Note: #200 is 200*200 square cover, can be customized. Same as other specification. | |||
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