... , and hot-dipped galvanizedRange Of ApplicationChemical industry, petroleum industry, construction industry, domestic installation and otherCertificatesISO- ... DIN GB/T12459,GB/T13401,ASME B16.91 USE: Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, ... .9 USE: Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc. Production Equipment Of Carbon Steel Elbow: ...