Answer: (1) Fault phenomenon. Oil pipeline or flange leaks oil.
(2) Cause analysis.
1) Incomplete asbestos gasket;
2) Unqualified gasket material;
3) Uneven tightening of flange bolts;
4) Oil leakage in expansion joint.
(3) Elimination method.
1) Remake asbestos gasket;
2) Use oil-resistant asbestos board of appropriate thickness;
3) Retighten flange;
4) Replace expansion joint.
