Some standard content:
Preparation of Instrumentation Engineering Specification
Preparation of Instrumentation Engineering SpecificationHG/T20637.3-1998
Preparation unit: China Tianchen Chemical Engineering Corporation Approval department: State Administration of Petroleum and Chemical Industry Implementation date: January 1, 999
Preparers:
Song Xiaoxian and Ma Chengzong
Reviewers:
Lin Fulie
Ji Ronggao
Zhang Zhenji
1 General Provisions
1.0.1 This specification is used to guide automatic control designers to prepare instrumentation design specifications for engineering projects, or to guide designers to select and supplement the instrumentation design specifications (general) in Appendix A of this specification to form the instrumentation design specifications for engineering projects.
1.0.2 The instrumentation design specifications are the unified regulations of this profession in engineering projects. They not only explain the basic principles of their design to users, but also guide the design work of all automatic control designers participating in this project. The design regulations are used within the company and between users, and can also be issued to manufacturers. 1.0.3 When implementing these regulations, the provisions of the relevant national standards in force shall also be complied with. 271
Contents of instrument design regulations
2.1 Overview
2.1.1 The instrument design regulations shall include unified regulations for the engineering, design and installation of the entire plant instrumentation, including the main device, auxiliary device and public engineering system in the contract factory. Corresponding regulations are also made for complete sets (units). 2.1.2. The instrument design regulations only list the special regulations, general standards and basic standards related to the instrument engineering, design and installation of the automatic control profession. Commonly used engineering general standards, basic standards and instrument product standards are no longer mentioned. 2.1.3 The instrument design regulations only list commonly used abbreviations. 2.1.4 For the same process measurement medium in the contract factory, the instrument design regulations only stipulate the use of the same scale unit. 2.1.5 The instrument design regulations only list the meteorological and environmental conditions of the contract factory construction area related to the instrument engineering, design and installation.
2.1.6 Instrument design regulations do not include the methods and details used in design and calculation. 2.2 Design selection
2.2.1 The general regulations for design selection are as follows: 1 Instrument design selection is to select instruments that are technologically advanced, reliable, easy to maintain and install, and economically reasonable, under the premise of meeting the working conditions of the process measurement medium and the process monitoring function. 2 The design regulations shall uniformly stipulate the following items: 1 Instrument transmission signal
2) Main monitoring methods of each device and main item
3) Functions of panel-mounted instruments
4 General requirements for local installation of instruments
: 5) Painting
6) Scale and recording paper
7) Safety design
8 Nameplate marking
9) Instructions for the preparation of the position number of the instrument system
2.2.2 The selection of flow meters shall comply with the following regulations: When the process pipeline size is DN50 and above, the concentric sharp orifice plate differential pressure flow meter is generally considered first. When the process pipeline size is below DN50, the rotor flow meter is generally considered first. If the above-mentioned type of flow meter cannot meet the working conditions of the process measurement medium, other types of flow meters shall be considered. 2.2.3 The selection of liquid level instruments shall comply with the following provisions: Continuous measurement of liquid level: generally select differential pressure level gauges. In situations where the measurement range is within 2000mm and the differential pressure level gauge is not suitable, an external floating simple level gauge or other types of liquid level instruments may be used according to the situation. The selection of pressure instruments and differential pressure instruments shall comply with the following provisions: 224
For on-site pressure gauges, ordinary pressure gauges with a dial size of 100mm or 150mm are generally selected. 1
2 The material and type of pressure instruments and differential pressure instruments shall meet the process conditions. 3 Anti-vibration pressure gauges are generally selected for pump outlets. In situations with pulsation, pulsation dampers should also be provided. 4· In various situations such as highly corrosive, easy to crystallize, containing solid particles and high-viscosity fluids, diaphragm pressure gauges, such as diaphragm-sealed pressure or differential pressure instruments, should be selected. The size of the diaphragm or diaphragm sealing flange should comply with the measured pressure or differential pressure range.
5Try to avoid using pressure and differential pressure measurement systems with isolation fluid. 2.2.5The selection of temperature instruments shall comply with the following provisions: 1The type, specification and material of the thermometer sleeve shall be clearly specified. 2Under normal circumstances, no thermocouple thermometer is considered to measure the process medium temperature. In the same contract factory, the type of thermocouple used shall be reduced as much as possible. When the measurement range is very small, or high-precision measurement is required (such as temperature compensation of flow measurement, the operating temperature range is -200 to +400℃), a thermal resistance thermometer with a graduation number of Pt100 is used.
3On-site measurement generally uses a bimetallic thermometer. 4Special measurement occasions, other types of temperature instruments are selected as needed. 2.2.6The selection of analytical instruments shall comply with the following provisions: 1Detailed provisions shall be made for the process medium working conditions and monitoring function requirements, analyzer characteristics, flow path, components, sampling system and sample gas processing system, and the setting and requirements of the analyzer room. In particular, more attention should be paid to the harsh process medium working conditions.
2 The sampling system and sample gas processing system should be provided as a complete set by the analyzer complete set supplier. The gas monitor for detecting the concentration of combustible or toxic gases in the environment should also be designed in a unified manner. 3
The determination and selection of the caliber of the control valve (including self-operated regulating valve) should specify the following contents: 2.2.7
1· The calculation standard of the Cv value of the control valve and the principle of determining the caliber size; 2· According to the characteristics of the process medium, determine the type of valve, actuator, packing and upper valve cover type 3· According to the characteristics of the control system, determine the valve internals and accessories, and the measures to ensure the safety of personnel and factory equipment when the instrument gas source and power supply fail;
4 The material and rated pressure of the control valve;
5 The connection method and sealing surface type of the control valve body. 2.2.8 The determination of the caliber size of the safety and relief valve should specify the calculation standard, selection and issues to be considered, as well as the structure, material, rated pressure and interface specifications of the upper valve cover. 2.2.9 The design regulations for alarm and interlocking systems shall include the following contents: 1. For the panel-mounted sound and light alarm system installed in addition to the DCS alarm function, the functions to be realized and the equipment selection shall be specified;
2. For the interlocking system used for emergency stop, the requirements for its on-site contacts and interlocking functions, interlocking implementation methods, and functions to be realized shall be specified.
2.2.10. The instrument panel shall be specified in terms of selection and painting requirements, the height of the instrument installed on the instrument panel, the power supply entering the instrument panel and the piping direction of the instrument panel, and the wiring in the instrument panel and the instrument air piping requirements. 2.2.11 The distributed control system (DCS) shall be specified in terms of system composition, equipment specifications, monitoring function requirements, redundancy and communication. The cable direction in the control room shall also be specified in the design. 2.2.12 The power supply and grounding system shall be specified in the following: 1. The specifications of the power supply, reliability requirements, AC power supply and DC power supply, the power supply specifications of the power-consuming equipment, and the special requirements of the equipment. Requirements for the switchboard, power supply box, and cabinet. 2 Requirements are put forward for shell grounding, DCS grounding, signal grounding, shield grounding and safety system grounding respectively. 2.2.13 Instrument gas supply system, the gas supply pressure, gas supply quality, backup time of gas storage tanks and instrument gas supply system with special requirements of the whole plant instrument gas source gas supply system shall be specified. 2.3 Installation
Design provisions shall be made for the interface types and specifications of various instruments and process pipelines, containers and equipment. 2.3.1
2.3.2 Design provisions shall be made for the piping size, material, pipe fitting type, etc. of instrument measurement pipelines. 2.3.3 Design provisions shall be made for the form and material of gas source piping and the specification size and material of pneumatic signal piping.
2.3.4 Design provisions shall be made for the piping form, heating medium and piping specifications of adiabatic heating, and the setting of protection box or insulation box.
2.3.5 Design provisions shall be made for the laying method of cables, the selection of cable trays and materials, as well as the size and specifications.
2.3.6. Instrument Wiring
Design regulations for the cable connection between the field instrument and the control room, determine whether to use a single cable for direct connection, or use a multi-core cable through the field intermediate junction box, and make design regulations for the size and specifications of the junction box. 2 Design regulations should not be made for different types of instrument signals using the same multi-core cable. 274
3 Requirements for writing instrument design regulations
3.0.1 The design regulations are an important design document, and the text must be concise and clear. The standards or specifications used should be current, and the name, code and year of the standard should be indicated. 3.0.2
The conditions listed in the design regulations are mandatory regulations, and the words "recommended" and "suggested" shall not be used. 3.0.3
A.1.1 Scope
Appendix A
Instrument Design Regulations (General)
A.1 Overview
This regulation is a general guidance document for the design and installation of instrument systems in factories. For complete sets of supply units (such as rotating machinery, complete sets of boilers, public engineering systems, etc.), the following regulations are made:口
The standards of the complete set supplier should be adopted, except for the following standard signals: 4~20mADC
Electromotive force (EMF) of thermocouple
0.2~1.0bar
Only the items marked with asterisks (*) are adopted.
Related engineering/design regulations
HG20505
HG20507
HG20508
HG20509
HG20510
HG20511
HG20512
HG20513
HG20514
HG20515
HG20516
HG/T20573
HG/T20638
Thermal resistance (RTD)
20～100kPa
《Text codes and graphic symbols for process detection and control systems》《Automation instrument selection regulations》
《Control room design "Design Regulations"
"Instrument Power Supply Design Regulations"
"Instrument Gas Supply Design Regulations"
"Instrument Alarm and Interlocking System Design Regulations"
"Instrument Piping and Wiring Design Regulations"
"Instrument System Grounding Design Regulations"
"Instrument and Pipeline Heating and Insulation Design Regulations"
"Instrument Isolation and Purging Design Regulations"
"Automatic Analyzer Room Design Regulations"
"Distributed Control System Engineering Design Regulations""Regulations on the Depth of Automatic Control Professional Engineering Design Documents"A
GB50058
A.1.3 Engineering Standards
"Design Code for Electrical Installations in Explosive and Fire Hazardous Environments" The specifications and standards adopted in these regulations are as follows, and the specifications and standards involved are generally the latest versions. 1
GB7306-87.ISO7/1
GB7307-87, ISO228/1
2Flange
ANSIB16.36.B16.36a
3Flow
1)Orifice
JSO5167-1
BS1042
1)Thermocouple
IEC584
BS4937
2)RTD
IEC751
BS1904
5Control valve
1)Size calculation
IEC534
ANSI/FCI 62-1
2) Valve seat leakage
ANSI/FCI70-2
Electrical explosion-proof zone division
GB50058-92
BS229,4683
Instrument housing protection
ANSIB1.20.1(NPT)
GB 193-81.ISO262
GB/T2624—-93
ANSI/API2530
ANSIMC96.1
JISC1604
ANSI/ISA-S75.01
NEC(NFPA)
VDE0171
口JB/T
DIN9152
JISC1602
DIN43760
GB4208-93 (equivalent to IE C-529-1989）A.1.4 Abbreviations
M(F), (M)-
MFRSTD
Specified items
Not adopted
Distributed control system
Electromotive force of thermocouple
Internal and external threads (GB307-87), (ISO228/1)Internal and external threads (GB193-81), (ISO262)Grounding resistance
Input/output
Light emitting diode
Manufacturer standard
ANSI B1.20.1（ External thread), (internal thread) NPT (M), (F) -bzxZ.net
SPD (S) T-
Scale unit
Liquid flow:
Gas flow:
Programmable logic controller
Polyvinyl chloride
ISO7/I internal thread) (GB7306-87)
ISO7/I external thread) (GB7306-87)
Thermal resistance
Raised face flange
Ring joint flange
Single pole double throw
Double pole double throw|| tt||Stainless steel or corresponding products
Uninterruptible power supply system
kg/h,t/h
■L/h,m2/h
Steam flow:
Liquid level:
Pressure and differential pressure:
Vacuum pressure:
Temperature:
Density:
Conductivity:
Component analysis:
Viscosity:
Site conditions
Temperature: Highest
Regional atmospheric pressure:
Instrument transmission signal
1) Main Instrument:
*Nl/h (*0℃, 1atm is standard state) kg/h, t/h
mm, m: used for tank area level gauge
(k,M)Pa
(k)Pa,(k)PaA
kg/m,g/cm3
μs/cm
centistokes (mm2/s)
Electric type: 4~20mADC
2) Local regulator:
Pneumatic type
Design and selection
Pneumatic type
20~100kP a
0.2~1.0bar
piQ/cm
m?/second
20～100kPa
0.2~1.0bar
Main monitoring method of each device/main item
Device or
Main item name
Main monitoring
Control system
Function of panel-mounted instruments
Monitoring location
The function selection of the following panel-mounted instruments is:
Main regulating instrument
Local regulating instrument
Auxiliary regulating instrument Table
1) Regulator:
Conventional type
Signal transmission method with central control room
Pump and compressor start and stop centralized
Operation status
Based on microprocessor type (single-loop regulator)2) Indicator:
口Small
3) Handheld operator:
With indicator口
4) Pen recorder:
Conventional type
口4 pens
2 pen indicators
1 pen indicator
No indicator (only output indicator ）
Based on microprocessor
5) Multi-point (dot-type) recorder:
Conventional type
口12 points
6) Multi-point temperature indicator:
Based on microprocessor
Analog display with manual point selector
Automatic digital display (scanner)
7) Monitoring switch:
Installed in controller, indicator and recorder口·Used in interlocking system
口Small
口2 pens
Digital display with manual point selector
Independent switch0bar
Only the items marked with an asterisk (*) apply.
Related engineering/design regulations
HG20505
HG20507
HG20508
HG20509
HG20510
HG20511
HG20512
HG20513
HG20514
HG20515
HG20516
HG/T20573
HG/T20638
Thermal resistance (RTD)
20～100kPa
《Text codes and graphic symbols for process detection and control systems》《Automation instrument selection regulations》
《Control room design "Design Regulations"
"Instrument Power Supply Design Regulations"
"Instrument Gas Supply Design Regulations"
"Instrument Alarm and Interlocking System Design Regulations"
"Instrument Piping and Wiring Design Regulations"
"Instrument System Grounding Design Regulations"
"Instrument and Pipeline Heating and Insulation Design Regulations"
"Instrument Isolation and Purging Design Regulations"
"Automatic Analyzer Room Design Regulations"
"Distributed Control System Engineering Design Regulations""Regulations on the Depth of Automatic Control Professional Engineering Design Documents"A
GB50058
A.1.3 Engineering Standards
"Design Code for Electrical Installations in Explosive and Fire Hazardous Environments" The specifications and standards adopted in these regulations are as follows, and the specifications and standards involved are generally the latest versions. 1
GB7306-87.ISO7/1
GB7307-87, ISO228/1
2Flange
ANSIB16.36.B16.36a
3Flow
1)Orifice
JSO5167-1
BS1042
1)Thermocouple
IEC584
BS4937
2)RTD
IEC751
BS1904
5Control valve
1)Size calculation
IEC534
ANSI/FCI 62-1
2) Valve seat leakage
ANSI/FCI70-2
Electrical explosion-proof zone division
GB50058-92
BS229,4683
Instrument housing protection
ANSIB1.20.1(NPT)
GB 193-81.ISO262
GB/T2624—-93
ANSI/API2530
ANSIMC96.1
JISC1604
ANSI/ISA-S75.01
NEC(NFPA)
VDE0171
口JB/T
DIN9152
JISC1602
DIN43760
GB4208-93 (equivalent to IE C-529-1989）A.1.4 Abbreviations
M(F), (M)-
MFRSTD
Items specified
Not adopted
Distributed control system
Electromotive force of thermocouple
Internal and external threads (GB307-87), (ISO228/1)Internal and external threads (GB193-81), (ISO262)Grounding resistance
Input/output
Light emitting diode
Manufacturer standard
ANSI B1.20.1（ External thread), (internal thread) NPT (M), (F) -
SPD (S) T-
Scale unit
Liquid flow:
Gas flow:
Programmable logic controller
Polyvinyl chloride
ISO7/I internal thread) (GB7306-87)
ISO7/I external thread) (GB7306-87)
Thermal resistance
Raised face flange
Ring joint flange
Single pole double throw
Double pole double throw|| tt||Stainless steel or corresponding products
Uninterruptible power supply system
kg/h,t/h
■L/h,m2/h
Steam flow:
Liquid level:
Pressure and differential pressure:
Vacuum pressure:
Temperature:
Density:
Conductivity:
Component analysis:
Viscosity:
Site conditions
Temperature: Highest
Regional atmospheric pressure:
Instrument transmission signal
1) Main Instrument:
*Nl/h (*0℃, 1atm is standard state) kg/h, t/h
mm, m: used for tank area level gauge
(k,M)Pa
(k)Pa,(k)PaA
kg/m,g/cm3
μs/cm
centistokes (mm2/s)
Electric type: 4~20mADC
2) Local regulator:
Pneumatic type
Design and selection
Pneumatic type
20~100kP a
0.2~1.0bar
piQ/cm
m?/second
20～100kPa
0.2~1.0bar
Main monitoring method of each device/main item
Device or
Main item name
Main monitoring
Control system
Function of panel-mounted instruments
Monitoring location
The function selection of the following panel-mounted instruments is:
Main regulating instrument
Local regulating instrument
Auxiliary regulating instrument Table
1) Regulator:
Conventional type
Signal transmission method with central control room
Pump and compressor start and stop centralized
Operation status
Based on microprocessor type (single-loop regulator)2) Indicator:
口Small
3) Handheld operator:
With indicator口
4) Pen recorder:
Conventional type
口4 pens
2 pen indicators
1 pen indicator
No indicator (only output indicator ）
Based on microprocessor
5) Multi-point (dot-type) recorder:
Conventional type
口12 points
6) Multi-point temperature indicator:
Based on microprocessor
Analog display with manual point selector
Automatic digital display (scanner)
7) Monitoring switch:
Installed in controller, indicator and recorder口·Used in interlocking system
口Small
口2 pens
Digital display with manual point selector
Independent switch0bar
Only the items marked with an asterisk (*) apply.
Related engineering/design regulations
HG20505
HG20507
HG20508
HG20509
HG20510
HG20511
HG20512
HG20513
HG20514
HG20515
HG20516
HG/T20573
HG/T20638
Thermal resistance (RTD)
20～100kPa
《Text codes and graphic symbols for process detection and control systems》《Automation instrument selection regulations》
《Control room design "Design Regulations"
"Instrument Power Supply Design Regulations"
"Instrument Gas Supply Design Regulations"
"Instrument Alarm and Interlocking System Design Regulations"
"Instrument Piping and Wiring Design Regulations"
"Instrument System Grounding Design Regulations"
"Instrument and Pipeline Heating and Insulation Design Regulations"
"Instrument Isolation and Purging Design Regulations"
"Automatic Analyzer Room Design Regulations"
"Distributed Control System Engineering Design Regulations""Regulations on the Depth of Automatic Control Professional Engineering Design Documents"A
GB50058
A.1.3 Engineering Standards
"Design Code for Electrical Installations in Explosive and Fire Hazardous Environments" The specifications and standards adopted in these regulations are as follows, and the specifications and standards involved are generally the latest versions. 1
GB7306-87.ISO7/1
GB7307-87, ISO228/1
2Flange
ANSIB16.36.B16.36a
3Flow
1)Orifice
JSO5167-1
BS1042
1)Thermocouple
IEC584
BS4937
2)RTD
IEC751
BS1904
5Control valve
1)Size calculation
IEC534
ANSI/FCI 62-1
2) Valve seat leakage
ANSI/FCI70-2
Electrical explosion-proof zone division
GB50058-92
BS229,4683
Instrument housing protection
ANSIB1.20.1(NPT)
GB 193-81.ISO262
GB/T2624—-93
ANSI/API2530
ANSIMC96.1
JISC1604
ANSI/ISA-S75.01
NEC(NFPA)
VDE0171
口JB/T
DIN9152
JISC1602
DIN43760
GB4208-93 (equivalent to IE C-529-1989）A.1.4 Abbreviations
M(F), (M)-
MFRSTD
Specified items
Not adopted
Distributed control system
Electromotive force of thermocouple
Internal and external threads (GB307-87), (ISO228/1)Internal and external threads (GB193-81), (ISO262)Grounding resistance
Input/output
Light emitting diode
Manufacturer standard
ANSI B1.20.1（ External thread), (internal thread) NPT (M), (F) -
SPD (S) T-
Scale unit
Liquid flow:
Gas flow:
Programmable logic controller
Polyvinyl chloride
ISO7/I internal thread) (GB7306-87)
ISO7/I external thread) (GB7306-87)
Thermal resistance
Raised face flange
Ring joint flange
Single pole double throw
Double pole double throw|| tt||Stainless steel or corresponding products
Uninterruptible power supply system
kg/h,t/h
■L/h,m2/h
Steam flow:
Liquid level:
Pressure and differential pressure:
Vacuum pressure:
Temperature:
Density:
Conductivity:
Component analysis:
Viscosity:
Site conditions
Temperature: Highest
Regional atmospheric pressure:
Instrument transmission signal
1) Main Instrument:
*Nl/h (*0℃, 1atm is standard state) kg/h, t/h
mm, m: used for tank area level gauge
(k,M)Pa
(k)Pa,(k)PaA
kg/m,g/cm3
μs/cm
centistokes (mm2/s)
Electric type: 4~20mADC
2) Local regulator:
Pneumatic type
Design and selection
Pneumatic type
20~100kP a
0.2~1.0bar
piQ/cm
m?/second
20～100kPa
0.2~1.0bar
Main monitoring method of each device/main item
Device or
Main item name
Main monitoring
Control system
Function of panel-mounted instruments
Monitoring location
The function selection of the following panel-mounted instruments is:
Main regulating instrument
Local regulating instrument
Auxiliary regulating instrument Table
1) Regulator:
Conventional type
Signal transmission method with central control room
Pump and compressor start and stop centralized
Operation status
Based on microprocessor type (single-loop regulator)2) Indicator:
口Small
3) Handheld operator:
With indicator口
4) Pen recorder:
Conventional type
口4 pens
2 pen indicators
1 pen indicator
No indicator (only output indicator ）
Based on microprocessor
5) Multi-point (dot-type) recorder:
Conventional type
口12 points
6) Multi-point temperature indicator:
Based on microprocessor
Analog display with manual point selector
Automatic digital display (scanner)
7) Monitoring switch:
Installed in controller, indicator and recorder口·Used in interlocking system
口Small
口2 pens
Digital display with manual point selector
Independent switch0bar
Main monitoring methods of each device/main item
Device or
Main item name
Main monitoring
Control system
Function of panel-mounted instruments
Monitoring location
The following panel-mounted instruments can be selected as follows:
Main regulating instruments
Local regulating instruments
Auxiliary regulating instruments
1) Regulator:
Conventional type
Signal transmission method with central control room
Concentrated start and stop of pumps and compressors
Operation status
Based on microprocessor type (single-loop regulator)2) Indicator:
Port small
3) Hand operator:
With indicator port|| tt||4) Pen recorder:
Conventional type
口 4 pens
2 pens indicating
1 pens indicating
No indicator (output indicator only)
Based on microprocessor
5) Multi-point (dot-type) recorder:
Conventional type
口 12 points
6) Multi-point temperature indicator:
Based on microprocessor
Analog display with manual point selector
Automatic digital display (scanner)
7) Monitoring switch:
Installed in controller, indicator and recorder口·Used in interlocking system
口 Small
口 2 pens
Digital display with manual point selector
Independent switch
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