SH/T 3164-2021 English PDF (SHT3164-2021)

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SH/T 3164-2021: Design specification for instrument system lightning surge protection in petrochemical industry
SH/T 3164-2021
SH
PETROCHEMICAL INDUSTRY STANDARD
ICS 91.120.40
P 72
File No.. J3023-2022
Replacing SH/T 3164-2012
Design specification for instrument system lightning surge
protection in petrochemical industry
ISSUED ON. AUGUST 21, 2021
IMPLEMENTED ON. FEBRUARY 01, 2022
Issued by. Ministry of Industry and Information Technology of the People's
Republic of China.
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Terms and abbreviations... 6
3.1 Terms... 6
3.2 Abbreviations... 9
4 General... 10
5 Decision of lightning surge protection engineering for instrumentation... 10
6 Earthing system in lightning surge protection engineering for instrumentation... 11
6.1 Instrumentation earthing system in control room... 11
6.2 Cabinet and operating console earthing... 13
6.3 Bonding conductor and wire... 14
6.4 Laying of cables and wire... 15
6.5 Bonding method... 15
6.6 Earthing sign... 16
7 Surge protective device... 16
7.1 General... 16
7.2 Type of surge protective device... 16
7.3 Parameters of surge protective device for signal type... 17
7.4 Surge protective device application... 18
7.5 Surge protection in AC power supply... 19
8 Surge protection for instrumentation in control room... 19
8.1 Shielding for instrumentation in control room... 19
8.2 Installation for surge protective device... 19
8.3 Earthing and bonding for surge protective device... 20
9 Lightning and surge protection for field instrumentation... 20
9.1 Lightning protection for field instrumentation... 20
9.2 Installation for surge protective device... 20
9.3 Field instrumentation earthing... 21
10 Lightning and surge protection for cables... 22
10.1 Shielding of cables... 22
10.2 Earthing for cable shielding... 22
10.3 Spare cable and spare core of cable... 24
11 Surge protection for intrinsic safety system... 24
11.1 Surge protective device for intrinsic safety system... 24
11.2 Installation for surge protective device... 25
11.3 Bonding in intrinsic safety system... 25
12 Surge protection for fieldbus system... 25
12.1 Surge protective device for fieldbus system... 25
12.2 Surge protective device application... 26
12.3 Fieldbus system earthing... 27
13 Lightning protection for control building... 27
Appendix A (informative) Network type earthing referenced drawing... 28
Appendix B (informative) Shielding of cables earthing referenced drawing... 30
Bibliography... 34
Explanation of terms used in this Specification... 35
Instructions for revision... 37
1 Scope... 39
3 Terms and abbreviations... 39
4 General... 39
5 Decision of lightning surge protection engineering for instrumentation... 40
6 Earthing system in lightning surge protection engineering for instrumentation... 42
7 Surge protective device... 44
8 Surge protection for instrumentation in control room... 47
9 Lightning and surge protection for field instrumentation... 47
10 Lightning and surge protection for cables... 49
11 Surge protection for intrinsic safety system... 49
12 Surge protection for fieldbus system... 50
13 Lightning protection for control building... 50
Design specification for instrument system lightning surge
protection in petrochemical industry
1 Scope
This Specification specifies the design rules for lightning protection engineering of
instrument systems.
This Specification is applicable to the lightning protection design of instrument systems
for explosive environments and non-explosive environments in new construction,
expansion and reconstruction projects of petrochemical and coal-based fuel and
chemical product plants.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB 50057-2010, Code for design protection of structures against lightning
GB/T 18802.21, Low-voltage surge protective devices -- Part 21.Surge protective
devices connected to telecommunications and signaling networks -- Performance
requirements and testing methods
3 Terms and abbreviations
3.1 Terms
For the purposes of this document, the following terms and definitions apply.
3.1.1 air-termination system
Metal objects and metal structures used to directly receive or withstand lightning strikes,
such as. lightning rods (formerly known as lightning rods), lightning strips (wires),
lightning nets, etc.
3.1.2 down conductor system
Conductor connecting the air-termination system to the earth termination system.
5.2 When a building is set up with lightning protection according to Chapter 3 of GB
50057-2010, and instruments are installed inside, especially if it has outdoor signal lines,
lightning surge protection engineering for instrumentation shall be implemented to
prevent outdoor signal lines from introducing lightning into the room and damaging
electronic equipment, endanger personal safety.
5.3 Factory areas where personnel have been injured by lightning strikes or lightning
strikes that have endangered production safety shall implement lightning surge
protection engineering for instrumentation.
5.4 When the regulatory authorities or owners assess that the possible economic losses
caused by lightning strikes are greater than the tolerable economic losses, or the
expected risks of lightning strikes are greater than the tolerable risks, lightning surge
protection engineering for instrumentation shall be implemented.
5.5 When the number of lightning strikes with lightning current intensity above 130kA
has occurred in the factory area ≥ 2 times/year, it is appropriate to implement lightning
surge protection engineering for instrumentation. The number of lightning strikes and
lightning current intensity can be determined based on data from the local
meteorological department or self-measurement results.
5.6 Departments with corresponding management or supervision rights may implement
lightning surge protection engineering for instrumentation in accordance with
regulations without evaluation.
6 Earthing system in lightning surge protection engineering for
instrumentation
6.1 Instrumentation earthing system in control room
6.1.1 The instrument earthing system in the control room shall adopt a mesh-structured
earthing system, which can be used in various buildings and rooms equipped with
instruments.
6.1.2 The protective earthing, working earthing, intrinsic safety earthing, shielding
earthing, anti-static earthing, surge protective device earthing, etc. of the control room
shall be connected to a unified mesh structure earthing system nearby. The mesh
structure earthing system shall not distinguish between earthing types.
6.1.3 The mesh structure shall be in the form of multiple bonding bars connected into a
grid. The bonding bar shall be arranged according to the arrangement of instrument
cabinets and operating consoles, under the movable floor, in the cable trench, or in a
suitable space under all cabinets and operating consoles that need to be earthed.
6.6 Earthing sign
6.6.1 The construction of various earthing wires, bonding conductors, bonding bars, etc.
in the control room shall be easy to inspect and maintain. Visible signs shall be set up.
6.6.2 The connection to the bonding terminal shall be clearly marked.
7 Surge protect...