Recommended checks and tests schedule for shell boilers NOT to Arrangement 3. (C) Observation of abnormal noises, smells or other noticeable factors. (T) Checking and/or testing the functional behaviour of equipment parts, including observation.
Checks and testing
Remarks
Safeguards against excessive pressure (safety valves)
C
T
See NOTES 1 and 2 below Compared with limiters and controls
Water level indication
T
Drain and blow-down devices T Valves C
As per manufacturer’s instruction manual Functional check by lowering the water level to the switching points Compared with limiters and controls Functional check by increasing the pressure to the switching points (1) Comparison of the measured values with the reliable samples (2) Performed by a suitably qualified and competent person (3) Electrical and mechanical testing performed by a suitably qualified and competent person
T T
Feed water control Low water protection Steam pressure and temperature indication
C
C T
C
Pressure limitation
C T C T
Temperature limitation
Devices for water quality protection
T (1)
T (2)
C
T (3)
Protective systems
C
Pressure parts (pipes, inspection openings, flanges, gaskets, joints…) Pressure controller and temperature controller
C
C C T
T
Feed water supply
T
Water quality
See BG04
(5) Performed by a suitably qualified and competent person as
T (5)
Heat supply per manufacturer’s instruction manual but not less than once every 6 months. NOTE 1 Additional function tests and observation can be required either by National Rules, third parties or the manufacturer. NOTE 2 Deviations of periods or tests are possible with agreement of third parties if safety level will not be reduced. C
BG01 Guidance on the safe Operation of Steam Boilers Edition 2 – © 2019
Page 58
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