6.4　Flue Lining

6.4.1　Quality of brickwork of the flue shall comply with the requirements in current national standard GB 50309 Code for Quality Inspection and Acceptance of Industrial Furnace Building.

6.4.2　The sequence of brickwork of flue:wall，dome，bottom and flue.

6.4.3　Quality inspection of the brickwork of flue shall comply with the requirements in current national standard GB 50309 Code for Quality Inspection and Acceptance of Industrial Furnace Building.