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First, the online verification of the operating requirements 1. When the safety valve for online verification, the production system should be in a normal stable state;
3. The monitoring of various operating parameters of the on-line calibration system should be strengthened and the operators should work closely together on the site. When signs of deviation from normal operating conditions are found, verification should be stopped immediately and timely measures taken to ensure the safety of the device.
4. The safety valve should be well documented during online verification.
5. The on-line calibration work should be undertaken by trained personnel.
Safety valve maintenance personnel assessment outline (TSGZF002-2005) provides maintenance personnel qualifications are divided into Class I and Class II.
(1) Class I maintenance personnel may perform maintenance, inspection, calibration, etc. of spring-loaded safety valves, lever-type safety valves, and static-type (hammer type) safety valves; calibration work may be performed on the calibration table.
(b) Class II maintenance personnel may engage in the maintenance, overhaul, and calibration of various types of safety valves. The calibration work can be performed on the calibration table, and pressure setting work can also be performed online.
Actual Operation Skills I. Operational Skills Assessment Contents of Class I Maintenance Personnel (1) Demolition, inspection and reassembly of a safety valve;
(2) verifying a safety valve on the verification station as required;
(3) Disposing opinions on the failure of the safety valve and performing repair operations for typical failures;
(d) grinding the sealing surface;
(V) Fill out the maintenance records and issue a verification report.
Second, grade II maintenance personnel's practical skills assessment content based on the actual operation skills assessment content of grade I maintenance personnel, but also the following assessment:
(1) In the case of simulation, carry out on-line verification of a safety valve, and fill in the record and issue a verification report;
(b) Demolition, inspection and assembly of a high pressure safety valve. Analyze and judge the analog faults and put forward processing advice;
(3) For a safety valve, according to the set conditions, a calibration process using the on-site calibration of medium pressure of the boiler, pressure vessel, and pressure pipeline is proposed.
Safety Valve Online Calibration Requirements
Before the safety valve is calibrated, the verification unit shall establish a feasible verification procedure, and make all kinds of material preparations and technical preparations. The technical personnel responsible for the pressure vessel must be on site to confirm.