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Regulatory provisions for energy isolation permits

Regulatory provisions for energy isolation permits

Jul 09, 2020

Regulatory provisions for energy isolation permits


1. Dangerous energy


Electrical, mechanical, chemical, hot/cold, potential energy (steam at any pressure, compressed air at more than one atmosphere, vacuum, pressurized liquid at more than one atmosphere, springs, tension rods, counterweights, etc.) or any other form of energy that, unchecked, could cause injury to persons or damage to property.


2 Energy isolation


In the process of operation or production operation, in order to prevent energy (including gas energy, hydraulic energy, thermal energy, mechanical energy and electric energy) leakage causing personnel injury, equipment damage or environmental pollution and other losses, the energy that may leak is adopted blind death, close the control valve and other measures to implement isolation.


Three people lock


A security lock used to lock a single isolation point for special use.


4. Locking facilities


Ensure that the auxiliary facilities can be locked, such as lock, valve lock sleeve, chain, etc.


The "Dangerous do not Operate" label


A label with clear warning messages, contact information for lock managers, etc., used for overall control of equipment.


6. Blind isolation


The use of a blind plate will blind the parts associated with the operating area that may produce energy leakage to ensure that the isolated energy will not be released causing damage to human health and the environment.  


Double isolation and emptying


The energy isolation system consists of two fully shut-off cut-off valves and a vent or drain valve

Single block valve isolation


A way of isolating energy by locking or hanging a "hazard - Do not Operate" warning sign after closing the single cutoff valve.  


9 device


Equipment applicable to this procedure includes, but is not limited to:

Switchboard and switch; Pump; Compressor; Pipeline; Boilers, pressure vessels and their accessories; Refrigerating equipment; Heating and ventilation systems; Indoor pipeline system; Facilities containing potential energy (such as springs, tension bars, counterweights); Instrumentation equipment.