What is a Level 4 operational change of a device?
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Regarding the HSE regulations for controlled production operations: Level 3 operational changes include the start-up, shutdown, and switching of major process equipment within the plant, the commissioning of general technical renovation projects or equipment, as well as maintenance of key control instruments and electrical equipment – all of which are considered critical operational processes； Level 4 operational changes mainly refer to the regular general operational changes carried out within the facility. Are tasks such as turning a pump’s shaft for Class C equipment and starting/stopping the pump considered level 4 operational changes?
Turning the pump shaft does not constitute an operational change; it is part of the routine daily work. The switching of Class C pumps can be considered to carry relatively low risk, as it involves operational changes that can be controlled within the main equipment.