6.5　Gas Sampling Device

Ⅰ　Dominant Items

6.5.1　The pressure test for sampling tube，sealing box and cooler before installation shall meet the requirements in the design documents.And it shall meet the requirements in Appendix E when not specified.

Check quantity:full check.

Check method:check the pressure test records of manufacturer.

Ⅱ　General Items

6.5.2　The allowable installation deviation of gas sampling device shall meet the requirements in Table 6.5.2.

Check quantity:random check for 1 set.

Check method:see Table 6.5.2.

Table 6.5.2　Allowable installation deviation of gas sampling device（mm）

6.5.3　When the sampling tube contacts the supporting piece in the flange，the clearance between guide roller and sampling tube shall meet the requirements in the design documents.It should be controlled to be within 1.5mm-2.5mm when not specified.

Check quantity:full check.

Check method:check with a feeler gauge.