... #45 St37 St52 St42 St35 API155Product CategoryMetallurgy, Mineral & EnergyTechniqueWelded,ERW Cold Rolled,Hot RolledSurfaceBared, Galvanized, Black Oiled,Or Other Anti-corrosive Treatment ... ,Scaffoldings, Electrical Cable conduits, Cooling towers, Antenna and Telecom Towers, Cold storages, Tabular polesFire Protection Systems, HVAC, Plumbing,Fabrication industry, Food ...