600*600mm b125 loading en124 composite manhole cover unit: mm Model Clear opening Loading class O D F H H Standard Hinged Jq-co600*600b 600*600mm B125 600*600 650*650 730*730 100 70 En124 No Basic parameter Product models Jq-co600*600 series Production technology Compression molding Material Composite smc Net weight * Loading class D400 c250 b125 a15 Hinged&gasket Optional Clear opening 600*600mm Working temperature -90â??-200â?? Cover diameter 650*650mm Test approval Ce sgs Shape Square Service life >30 years Lock style 2 screw Warranty 1 years Color Optional Place of origin Quanzhou , china Advantages of 600*600mm b125 loading en124 composite manhole cover : 1, higher stretch resistance and bend resistance , comply with en 124-1:2015, en 124-5:2015 . 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 7, insulation 8, free design