9.3　Cradle

Ⅰ　Dominant Items

9.3.1　In case of welding for cradle assembly，the WPQ shall be carried out with report，based on which the welding procedure and the operation instruction for welding shall be determined or prepared.

Quantity to be checked:100%.

Inspection method:Check WPQ report and the operation instruction for welding.

9.3.2　The internal quality of butt welds from the assembly of cradle shall comply with the requirement of the design technical document，or that of GradeⅢof weld quality grading criteria of Construction and Acceptance Code for Welding Work of Field Equipment and Industrial Pipeline（GB 50236）in case of no requirement in the above document.

Quantity to be checked:Randomly check 40%.

Inspection method:Check the ultrasonic or radiographic inspection records.

9.3.3　The appearance quantity of butt welds in case of cradle assembly shall meet the requirement of the design technical document，or that of Appendix E of the Code in case of no requirement in the above document.

Quantity to be checked:Randomly check 40%.

Inspection method:Observe，or check with a magnifier.

Ⅱ　General Items

9.3.4　The allowable deviation for assembly dimensions of cradle shall meet the requirement of the design technical document，or that in Table 9.3.4 in case of no requirement in the above document.

Quantity to be checked:100%.

Inspection method:See Table 9.3.4.

9.3.5　The allowable deviation for cradle installation shall comply with the requirements in Table 9.3.5.

Quantity to be checked:100%.

Inspection method:See Table 9.3.5.