This Specification specifies the design contents for the instrument system lightning protection engineering, including design method, lightning protection level, lightning protection for field instrumentation in explosive environment, equipotential bonding and earthing system, selection of surge protective device, laying and shielding of cables, and lightning protection for field-bus system.
This Specification is applicable to the lightning protection engineering design for the instrument and automatic control system in the flammable and explosive environment or non-flammable and non-explosive environment of constructed, renovated and extended projects in petrochemical industry.
This Specification is not applicable to the lightning protection for the industrial television monitoring system and fire alarm system in the petrochemical enterprises.
