... US: ASTM (A123), UK: BS7299Steel grating standardsA. China: YB/T4001-1998B. USA: ANSI/NAAMM (MBG 531 ... , Petro-chemistry, Machinery industry, Textile chemistry, Port engineering, Oil and grease chemistry, Agriculture husbandry, Horticulture, ... refinery, Mining and refinery, Power plants, Public utility, Marine engineering, Shipbuilding, Construction material industry, Defense projects, Airport ...