... iron GGG500-7 2.Standard:EN124 ISO9001:2000 3.Load Ability:B125,C250,D400 Custom Manhole Cover1. ... GGG500-7 & 400-12 b. Grey Iron GG203. Designs a. EN124 A15, B125, C250, D400, E600 and ... b. A60005 for casting design c. Major standards designs available d. As per customers' drawings or samples ... well, fire control well, all kinds of valve wells;(3) City water, drainage pipeline well; heat supplied, ...