... 3.Modular installment 4.Safe operation >20 years Substation steel structure 1.ISO9001:20082.Support smart grid3.Modular installment4.Safe operation ... substation structure description: 1. Our oversea project order executed use China standard Material Q235(mild steel), Q345(high tensile steel),Q360 ... check, wielding inspection, zinc coating inspection, prototype, etc. Substation steel structure