4.7　Erection of Other Pipes

4.7.1　Erection of other pipes includes the erection of steel pressure pipes，feed water pipes，dry/wet ash conveying pipes，nonmetal corrosion resistance pipes and other pipes as well as corresponding accessories in thermal power plants；the quality acceptance of the erection of the Supports and hangers in this section may be carried out with reference to the requirement of Table 4.5.2.

4.7.2　This clause is applicable to the quality acceptance of the erection of steel pipes，whose acceptance criteria are shown in Table 4.7.2.

4.7.3　This clause is applicable to the quality acceptance of the erection of ash（slag）conveying pipes，whose acceptance criteria are shown in Table 4.7.3.

4.7.4　This clause is applicable to the quality acceptance of the erection of the nonmetal corrosion resistance pipes，whose acceptance criteria are shown in Table 4.7.4.

4.7.5　This clause is applicable to the erection process control and inspection of other pipes in thermal power plants，which includes the following record.All those acceptance company columns not belonging to the acceptance scope in the record tables shall be marked with slash（/）.

1）Inspection record of pipes and fittings-Table 4.4.9-4

2）Erection and adjustment record of supports and hangers-Table 4.4.9-6

3）Valves inspection（Maintenance）and test acceptance record-Table 4.4.9-7

4）Hot state commissioning record of safety valves-Table 4.4.9-8

5）Adjustment and acceptance record of electric valves-Table 4.4.9-9

6）Concealed works acceptance and certification sheet-Table 4.4.9-10

7）Leak test acceptance and certification sheet-Table 4.4.9-11

8）Inspection record for pipes before pressure test-Table 4.4.9-13

9）Piping system purging（washing）certification sheet-Table 4.4.9-14

10）Inspection table for situation of performing mandatory requirements-Table 4.4.9-15

11）Erection record of compensation devices-Table 4.5.7