SH/T 3164-2021 (SH/T3164-2021, SHT 3164-2021, SHT3164-2021) & related versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Similar PDF |
| SH/T 3164-2021 | English | 790 |
Add to Cart
|
0-9 seconds. Auto delivery.
|
Design specification for instrument system lightning surge protection in petrochemical industry
|
SH/T 3164-2021
| Valid |
SHT 3164-2021
|
| SH/T 3164-2012 | English | RFQ |
ASK
|
7 days
|
Specification for design of instrument system lightning surge protection in petrochemical industry
|
SH/T 3164-2012
| Obsolete |
SHT 3164-2012
|
Buy with any currencies (Euro, JPY, KRW...): SH/T 3164-2021 Preview this PDF: SH/T 3164-2021
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 protective device
7.1 General
7.1.1 Surge protective devices shall be maintenance-free. They shall be able to
withstand multiple lightning surges without being damaged.
7.1.2 Surge protective devices shall be inspected for parameters and performance on a
batch-by-batch basis, and shall have an inspection certificate. The manufacturer of
surge protective devices shall have simulation surge testing equipment with lightning
standard test waveforms. Inspection shall be carried out by the manufacturer in
accordance with GB/T 18802.21 or manufacturer's standards.
7.1.3 Units or institutions that do not have simulation surge test and inspection
equipment with lightning standard test waveforms are not allowed to carry out any form
or performance inspection, certification and issue certificates other than CCC
certification.
7.1.4 When the instrument needs to be equipped with a surge protective device, it shall
be configured according to the provisions of 7.2, 7.3, and 7.4.
7.1.5 Surge protective devices with monitoring functions can be used and
corresponding centralized monitoring equipment can be configured.
7.2 Type of surge protective device
7.2.1 Commonly used surge protective devices for instruments include. signal type, DC
24V power supply type, AC or DC 220V power supply type, communication type, etc.
The selection shall be determined based on factors such as protection purpose, signal
type, operating voltage level, installation location, and installation method.
7.2.2 Two-wire, three-wire, four-wire 4mA ~ 20mA signal meters or other signal type
meters, as well as 24V DC circuits that power a single outdoor meter shall be equipped
with surge protective devices according to the signal type.
7.2.3 DC 24V power supply devices with power supply input lines with an outdoor
overhead length exceeding 100 m shall be equipped with surge protective devices in
h) Other instruments that are sensitive to lightning surges or cannot withstand
lightning surges.
7.4.5 Instruments that do not need surge protective devices.
a) Thermocouple;
b) Mechanical contact switches and buttons;
c) Instruments that are not electric or not related to electrical signals;
d) Other instruments capable of withstanding lightning surges.
7.5 Surge protection in AC power supply
7.5.1 The lightning protection design and surge protective device configuration of AC
power supply equipment shall comply with the provisions of Articles 6.4.4~6.4.7 of GB
50057-2010.
7.5.2 For on-site AC power supply instruments that need to be equipped with surge
protective devices, surge protective devices shall be equipped according to the AC
power supply parameters.
8 Surge protection for instrumentation in control room
8.1 Shielding for instrumentation in control room
8.1.1 Control room instruments shall be installed in steel cabinets or metal casings.
Separate components such as the door, top, bottom, and side panels of the cabinet shall
be conductively connected using insulated multi-stranded copper wires with a cross-
sectional area of ≥2.5 mm2 or other effective methods.
8.1.2 The cabinet shall be equipped with a protective bonding bar connected to the
cabinet body, and shall be connected to the nearest bonding bar below the cabinet.
8.2 Installation for surge protective device
8.2.1 Control room instrumentation shall be equipped with surge protective devices as
specified in Chapter 7.
8.2.2 Control room instrument surge protective devices shall be installed in the cabinet.
8.2.3 After the instrument cable enters the control room, it shall be connected to a surge
protective device first, and then to subsequent instruments (including fuse terminals).
8.3 Earthing and bonding for surge protective device
8.3.1 The surge protective device installed in the control room shall be installed on a
metal rail. The rail shall be used as a bonding bar (trip).
8.3.2 For special surge protective devices that do not use metal rails as bonding bars
(trips), a bonding bar (trip) shall be provided.
8.3.3 The surge protective device earth rail or bonding bar (trip) shall be connected to
the bonding bar under the cabinet or to the protective bonding bar (trip) inside the
cabinet.
9 Lightning and surge protection for field instrumentation
9.1 Lightning protection for field instrumentation
9.1.1 The instrument shall avoid being installed on the top or protruding position of
outdoor equipment, platforms, buildings and other objects to become a lightning-
receiving object.
9.1.2 When the installation position of the instrument may cause the instrument to form
a lightning contact object and cannot be moved, the instrument shall be installed in a
steel protective box or protective cover. The box or protective cover shall be earthed.
9.2 Installation for surge protective device
9.2.1 Field instruments shall use fabricated surge protective devices. For instruments
where fabricated surge protective devices cannot be installed, built-in surge protective
devices can be used. The parameters of the surge protective device shall comply with
the provisions of 7.3.Field instruments shall use line-line protection surge protective
devices.
9.2.2 The prefabricated surge protective device shall be in the form of a sealed thread
and installed at the vacant line inlet of the field instrument body or the tee interface
provided outside the line inlet. The external tee interface shall adopt a sealed thread
installation structure.
9.2.3 The wiring of the fabricated surge protective device shall be as short as possible.
No excess wire shall be left or crimped.
9.2.4 The surge protective device assembled with explosion-proof instruments shall not
change the explosion-proof structure and explosion-proof performance of the
instrument body. The explosion-proof surge protective device installed on the
instrument inlet shall pass the national compulsory product certification (CCC
connected to protective earthing at both ends. When the cable trough is long, multiple
earthing points shall be repeated, and the distance between earthing points shall be ≤30
m.
10.2.12 The inner shield of the cable shall be insulated from other conductors when
connected in the junction box. Unearthed shield ends shall be insulated.
10.2.13 The metal armor layer terminal of the armored optical cable shall use an
armored connector with a earth wire. A protective earth shall be connected to the optical
cable terminal. The metal core and protective layer in the optical cable shall be
connected to protective earthing at the terminal.
10.2.14 Metal cable ducts or protective steel pipes shall be connected to electrical
bonding outdoors at the entrance to the control room.
10.3 Spare cable and spare core of cable
10.3.1 The shielding layer of the spare cable and the spare core of the cable without
shielding layer shall be connected to the protective earth on the side of the control room.
10.3.2 For shielded cables whose shielding layer has been earthed, cables laid through
steel pipes or laid in metal cable troughs, the spare core does not need to be earthed and
shall be insulated at the cable terminals.
11 Surge protection for intrinsic safety system
11.1 Surge protective device for intrinsic safety system
11.1.1 Surge protective devices for intrinsically safe systems used in explosion-risk
areas shall pass the national compulsory product certification (CCC certification) of
China's nationally authorized explosion-proof certification agency and obtain a
certificate (intrinsic safety certification for relevant hazardous areas). Foreign
certifications that have mutual recognition with Chinese national inspection agencies
shall also provide proof of relevant mutual recognition agreements when providing
intrinsic safety certificates.
11.1.2 Intrinsically safe surge protective devices shall comply with the design and
manufacturing standards for intrinsically safe equipment.
11.1.3 If the field instrument surge protective device and the control room end surge
protective device in the same intrinsically safe line are not intrinsically safe "simple
equipment", the intrinsic safety parameters of both shall be included in the engineering
design calculation of the intrinsically safe line.
11.1.4 If the surge protective device is not an intrinsically safe associated instrument, a
surge protective device installed in a safe location shall not be certified as an
intrinsically safe associated instrument.
11.1.5 The performance and functions of surge protective devices and safety barriers in
intrinsically safe systems are different, and the two shall not replace each other.
11.1.6 The surge protective device combined with the safety barrier shall be of plug-in
type, and the signal circuit shall not be interrupted after the surge protective device is
pulled out.
11.2 Installation for surge protective device
11.2.1 Surge protective devices that protect indoor instruments in intrinsically safe
circuits shall be installed before outdoor cables enter the control room and are
connected to the safety barrier.
11.2.2 Surge protective devices and safety barriers can be installed side by side in the
same cabinet or in different cabinets. When installed in the same cabinet, the guide rails
shall be installed side by side as shown in Figure 6.2.1.They shall not be installed on
the same rail.
11.2.3 The installation of surge protective devices for on-site intrinsically safe
instruments shall comply with the provisions of 9.2.
11.3 Bonding in intrinsic safety system
11.3.1 The earth wire of the Zener barrier bonding rail shall be connected to the earth
rail of the surge protective device or the working earth or protective bonding bar (trip)
of the cabinet. It shall be connected to the negative pole of the DC power supply through
the earth according to the earthing diagram in Figure 6.2.1.Isolated safety barriers shall
not be earthed.
11.3.2 Intrinsically safe field instruments shall be earthed according to the provisions
of 9.3.
12 Surge protection for fieldbus system
12.1 Surge protective device for fieldbus system
12.1.1 Fieldbus surge protective devices shall be used for lightning protection of
fieldbus systems. The main parameters of the surge protective device shall comply with
the provisions of 7.3.
12.1.2 Surge protective devices for fieldbus instruments and equipment shall be suitable
Design specification for instrument system lightning surge
protection in petrochemical industry
1 Scope
This Specification aims to be concise and practical, clarify basic concepts, focus on
operation, implementation and execution, and prepare engineering design regulations
that are easy to follow. This Specification does not demonstrate or discuss the theory of
electromagnetic protection, and strives to avoid involving controversial theories and
methods. For unavoidable problems, only engineering methods that have been proven
feasible in practice are prescribed.
This Specification is applicable to the prevention engineering of on-site instruments
and control room instrument systems in petrochemical enterprises. It fills in the content
and scope that are not covered and addressed by other relevant domestic standards and
specifications.
The lightning protection project of the instrument system is an important disaster
prevention and reduction project in the petrochemical plant. The implementation of this
Specification has achieved remarkable results over the years. This revision is based on
the practice and effective methods of lightning protection engineering for instrument
systems in petrochemical plants in recent years, with a view to better guiding
engineering design and construction and preventing, reducing and eliminating lightning
accidents and losses.
3 Terms and abbreviations
This Specification only stipulates the terms and abbreviations that appear in the text.
Some terms and abbreviations are universal. The statements in this Specification strive
to be accurate and smooth. Some are used and defined in this Specification, which may
be different from other standards, specifications and data. When applied, the definitions
in this Specification shall prevail.
4 General
4.2 Every basic method adopted for instrument lightning protection is effective, and
certain methods cannot be ignored one-sidedly. For example. the earthing of the
instrument provides a discharge path for lightning current, but the discharge of lightning
current also requires the cooperation of methods such as the installation of surge
protective devices. Shielding can only reduce the intensity of lightning surges, but
cannot effectively limit the surge to the range that the instrument can withstand.
Measures such as equipotential bonding, laying of earthing wires, and reasonable
wiring have been reflected in the determination of the main methods, and therefore are
not specified as separate methods.
4.3 The various earths of the instrument are connected to the earth grid and finally to
the earth termination system. The earth resistance complies with the relevant standards
and specifications of earth termination systems and the designed earth resistance, so the
instrument profession no longer proposes or requires special requirements.
4.5 Since the signal transmission of optical cables is not affected by lightning, it is
recommended to use optical cables for outdoor instrument system communication
networks.
5 Decision of lightning surge protection engineering for
instrumentation
Some standards divide the space where the protected equipment and systems are located
into different lightning protection areas from the outside to the inside to distinguish the
intensity of the lightning electromagnetic field in each space and take protective
measures. Different standards have different divisions of lightning protection areas, and
the methods of lightning protection projects are also different. Some methods are not
feasible in engineering. In view of the situation of petrochemical plants and the
characteristics of instrument system lightning protection engineering, this revision
inherits the effective method of the previous edition, summarizes and unifies the
instrument system lightning protection engineering methods, and does not use lightning
protection zones.
The degree of lightning activity is related to the design of lightning protection
engineering. However, when evaluating the degree of lightning activity, only the annual
average number of thunderstorm days in a region cannot accurately reflect the actual
lightning strike situation. The lightning activity in the local area where the device is
located, the geographical environment, and the form of buildings (structures), etc. shall
be comprehensively considered. factor. In addition, the annual average thunderstorm
day value cannot express the value of lightning intensity.
Some specifications stipulate different lightning protection levels and different
lightning current parameters, which are used to set lightning protection measures. Due
to the randomness and dispersion of lightning current in the actual lightning strike
process and the uncertain factors of lightning current calculation parameters, it is
difficult to determine and adopt it in engineering. Therefore, this Specification
specifically stipulates lightning protection engineering methods for instrument systems
......
| Standard ID | SH/T 3164-2021 (SH/T3164-2021) | | Description (Translated English) | (Lightning protection design specification for petrochemical instrument system) | | Sector / Industry | Petrochemical Industry Standard (Recommended) | | Classification of Chinese Standard | P72 | | Classification of International Standard | 91.120.40 | | Word Count Estimation | 36,379 | | Date of Issue | 2021-08-21 | | Date of Implementation | 2022-02-01 | | Summary | This standard specifies the design rules for lightning protection engineering of instrumentation systems. This standard is applicable to the lightning protection engineering design of instrumentation systems for explosive hazardous environments and non-explosive hazardous environments in new construction, expansion and reconstruction projects of petrochemical and coal-based fuel and chemical products factories. | | Standard ID | SH/T 3164-2012 (SH/T3164-2012) | | Description (Translated English) | Specification for design of instrument system lightning surge protection in petrochemical industry | | Sector / Industry | Petrochemical Industry Standard (Recommended) | | Classification of Chinese Standard | P72 | | Classification of International Standard | 91.120.40 | | Word Count Estimation | 50,583 | | Drafting Organization | China Petrochemical Engineering Construction Company | | Administrative Organization | China Petrochemical Engineering Construction Corporation | | Regulation (derived from) | Ministry of Industry and Information Technology Bulletin No. 55 of 2012 | | Summary | This standard specifies the design method of mine system lightning protection project, lightning protection level, lightning protection of field instrument in explosion environment, selection of equipotential grounding system, selection of surge protector, shielding and laying of cable, and fieldbus system Lightning protection and other design requirements. This standard is applicable to the lightning protection engineering design of instruments and automatic control systems in the case of flammable and explosive atmospheres in new and changed petrochemical projects and in non-flammable and explosive atmospheres. This standard does not apply to the petrochemical enterprises in the industrial television monitoring system and automatic fire alarm system lightning protection. |
|