Bypass....

Cause of acccident

1. Use of temporary bypass method to restart the boiler after it had trip
2. Two bypass valves of the trip valves were opened without first closing the two block valves, downstream of the LPG control valve
3. Non-compliance of the company internal S.M.S.’s safety requirement

Lesson learnt

1. All personnel who are operating boiler must follow Safe Operating Procedures
2. Authorisation must be obtained before introducing change to the boiler system or procedures
3. Ensure all personnel who are operating boiler received adequate training and supervision
4. Ensure proper documentation.

p/s: don't neglect your boilers operation just because they operate automatically