The super pipeline safety valve is calibrated and then the safety valve is disintegrated and the parts are inspected. The safety valve with defects such as damage, crack, erosion and deformation of oil circuit plate, spring yellow, valve seat and protruding surface shall be repaired, adjusted and replaced. The safety valve with cracks on the oil circuit board, sticking between the valve core and the high-pressure gate valve, serious corrosion deformation due to yellowing, serious damage to the components and no maintenance shall be damaged.

During the inspection of the super pipeline safety valve and the price safety valve line, the oil circuit plate shall be properly cleaned and rust proofed, and the stress part of the oil circuit plate of the safety valve shall be inspected with human eyes for rust and cracks. If there are cracks, the valve shall be replaced immediately. The safety valve produced by the manufacturer without the production and manufacturing license or the safety valve without the factory nameplate or the calibration record shall be scrapped.

For the installation of special equipment, slowly increase the inlet working pressure of the safety valve. When 90% of the set pressure is achieved, the pressure transformation rate should not be higher than 0.01mpa/s. When it is detected that the piston valve is opened or the continuous discharge of the test substance is seen and heard, the inlet working pressure of the safety valve is regarded as the set pressure of the safety valve.

After the set pressure regulation reaches the standard, the working pressure at the inlet of the super pipeline regulating safety valve shall be reduced and the sealing characteristic test shall be carried out. When the set pressure is lower than 0.3MPa, the working pressure of the sealing property test should be 0.03mpa lower than the set pressure; When the set pressure is greater than or equal to 0.3MPa, the working pressure of the sealing characteristic test is 90% of the set pressure.