7.3　Hearth and Side Layer Bin

Ⅰ　Major Items

7.3.1　Welding quality shall meet the requirements of design technical documents.In case of no requirement in design technical documents，welding quality shall meet the requirements of welding line of IV quality level in current national standard GB 50236 Code for Acceptance of Field Equipment，Industrial Pipe Welding Construction Quality.

Quantity checked:10% selective examination by length of welding lines.

Checking method:Check by observation and weld gauge.

7.3.2　Installation of drive unit of fan-shaped gate shall meet the requirements of design technical documents and current national standard GB 50231 General Code for Construction and Acceptance of Mechanical Equipment Installation Engineering.

Quantity checked:All.

Checking method:Check by percent meter，clearance gauge，steel ruler，tinting and lead extrusion.

Ⅱ　General Item

7.3.3　Allowable deviation of hearth and side layer bin installation shall be in accordance with those specified in Table 7.3.3.

Quantity checked:All.

Checking method:Refer to Table 7.3.3.