First of all, the national, industrial and enterprise standards have clear provisions on dangerous energy isolation and lockout and tagout:

Gbt33579-2017 lockout and tagout of mechanical safety and dangerous energy control method

The standard specifies dangerous energy control requirements that may cause personal injury. Protective procedures, techniques, designs, methods and performance indicators for controlling accidental release of hazardous energy to avoid injury to personnel. It is applicable to the design, manufacture, installation, construction, repair, adjustment, inspection, dredge, setting, fault finding, testing, cleaning, disassembly, maintenance and maintenance of the machine in the whole life cycle.

GB/T 19670 mechanical safety to prevent accidental startup

GB/T 24612.2 "safety requirements for places of application of electrical equipment

GB5083 general principles for safety and health design of production equipment 5.6.3 prevention of accidental starting

GB6067.1 safety regulations for hoisting machinery 18.3.2 maintenance procedures

GB 22207 "safety requirements for positive displacement air compressors" .

AQ 3026 "safety code for equipment maintenance in chemical production units" ..

AQ 3028 code of practice for safety in confined space of chemical manufacturing units 4.2 safety isolation

In 2010, CNPC formulated the energy isolation management regulations (trial).

Secondly, in the production, due to the lack of safety awareness or relevant training, personnel ignore the lockout and tagout, illegal operations often lead to major safety accidents.