(2) Boiler hydrostatic test. After boiler overhaul, boiler working pressure and water pressure test should be carried out to check the tightness of pressure-bearing parts.
(3) Interlock test. All interlocking devices need to be tested to ensure the stability of the production process, prevent misoperation and quickly troubleshoot.
(4) Test of electro-pneumatic valve and regulating valve. All electric (gas) valves and regulating valves shall be fully opened, fully closed and locked to observe whether the indicator lights are on and off correctly; Whether the actual opening of electric (pneumatic) valve and regulating valve is consistent with the opening indicated by dial; Whether the limit switch (end switch) works; Whether there is leakage when it is fully closed.
(5) Rotating machinery operation. The motor insulation test is qualified, and the leakage flow of the control valve generally does not exceed 5% of the rated flow. All rotating machinery has passed the trial operation.
(6) Aerodynamic field test of cold furnace. If the combustion equipment has been overhauled or modified, the aerodynamic field test of the cold furnace should be carried out as needed.