Bulb Flats for Shipbuilding and Bridge building
GB5# HP120*9 HP260*11.5
GB6# HP120*10 HP260*12
GB7# HP140*7 HP260*13
GB8# HP140*8 HP280*11
GB9# HP140*9 HP280*12
GB10# HP140*10 HP280*13
GB12# HP160*7 HP300*11
GB14A HP160*8 HP300*12
GB14b HP160*9 HP300*13
GB16A HP160*10 HP300*14
GB16b HP160*11 HP320*12
GB18A HP180*8 HP320*13
GB18b HP180*9 HP320*14
GB20A HP180*10 HP340*12
GB20b HP180*11 HP340*13
GB22A HP180*12 HP340*14
GB22b HP200*9 HP340*15
GB24A HP200*10 HP370*13
GB24b HP200*11 HP370*14
GB27A HP200*11.5 HP370*15
GB27b HP200*12 HP400*14
HP80*5 HP220*10 HP400*15
HP80*6 HP220*11 HP400*16
HP80*7 HP220*11.5 HP430*13
HP100*6 HP220*12 HP430*14
HP100*7 HP240*10 HP430*15
HP100*8 HP240*11 HP430*17
HP120*6 HP240*12 HP430*19
HP120*7 HP260*10 HP430*20
HP120*8 HP260*11 
All above is our factory's bulb flat steel for shipbuilding and bridge building. 
The products have already approved through CCS (China), GL (Germany), DNV (Norway), LR (Britain), ABS (America), BV (France), NK(Japan), KR(Korea), RINA (Italy) etc. Ship classification societies. 
The steel class includes general strength steel A, B, D and high strength steel A32, A36, D32, D36. 
We also have special materials like SS400, SS540, S235JR, S235JO, S235J2, S275JR, S275JO, S275J2, S355JR, S355JO, S355J2, Q235B, Q275B, Q345B, Q420B, Q460B etc. Its executive standard can satisfy national standard GB/T9945-2001 and Europe standard BS EN 10067: 1997 requests and the product examination can satisfy BS EN10204: 2004 requests. 
Our factory has approvaled the Quality System Certiifcate by China national metallurgy quality system attestation center ISO9001 quality system in 2000. Common length: 6-12m