5　Process Structural Steelwork

5.1　General Provisions

5.1.1　The chapter is applicable to the quality acceptance for manufacturing，installation，welding，bolt connection and coating of process steel structure of blast furnace body，process steel structure of blast furnace body frame，process steel structure of hot-blast stove body and ancillary works，process steel structure of skew bridge or corridors truss of loader，process steel structure of gas purification system，process steel structure of large-diameter coil-welded steel pipe for plant area and within plant area.