4.12　Anti-corrosion Work

4.12.1　Fiber glass reinforced plastics anti-corrosion.

1　Scope of application：tank，groove，pool，ditch，etc.

2　Inspection quantity：check them one by one.

3　Quality standards and inspection methods are as shown in Table 4.12.1.

4.12.2　Spray painting anti-corrosion.

1　Scope of application：tank，groove，slot，etc.

2　Check quantity：check them one by one or in sections.

3　Quality standards and inspection methods are as shown in Table 4.12.2.

4.12.3　Rubber liner anti-corrosion.

1　Scope of application：tank car，storage tank，exchanger，degasser，metering tank，acid cleaning tank，etc.

2　Inspection quantity：check them one by one.

3　Quality standards and inspection methods are as shown in Table 4.12.3.

4.12.4　Pipe liner anti-corrosion.

1　Scope of application：carbon steel and cast iron pipe fittings.

2　Inspection quantity：check them one by one.

3　Quality standards and inspection methods are as shown in Table 4.12.4.

4.12.5　Plastic-coated composite steel pipe connector mouth repair.

1　Scope of application：sea water and corrosive medium delivery pipes.

2　Inspection quantity：check the pipe mouth one by one.

3　Quality standards and inspection methods are as shown in Table 4.12.5.

4.12.6　Installation of sacrificial anode.

1　Scope of application：sea water equipment and pipes.

2　Inspection quantity：randomly check of 10% for the parts of every batch（when arrived）and check one by one when installing.

3　Quality standards and inspection methods are as shown in Table 4.12.6.

4.12.7　Installation of impressed current cathodic protection.

1　Scope of application：sea water equipment and pipes.

2　Inspection quantity：check them with the constant potential instrument one by one，check the electrode randomly by 10%.

3　Quality standards and inspection methods are as shown in Table 4.12.7.