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KKS IDENTIFICATION HANDBOOK
PART A
GENERAL APPLICATION
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CONTENTS
STATE OF MODIFICATIONS
3
1. PREAMBLE
4
2. INTRODUCTION TO KKS
8
2.1.
DESIGNATION AND TYPE OF DATA CHARACTERS
8
2.2.
PROCESS-RELATED IDENTIFICATION
9
3. STRUCTURE AND CONTENTS OF THE BREAKDOWN LEVELS
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9
3.1.
BREAKDOWN LEVEL 0, TOTAL PLANT "G" & LEVEL 1, "F0"
9
3.2.
BREAKDOWN LEVEL 1, FUNCTION PREFIX NUMBER
11
3.3.
BREAKDOWN LEVEL 2, EQUIPMENT UNIT A1, A2, AN, A3
12
3.4.
BREAKDOWN LEVEL 3, ITEM B1, B2, BN
18
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STATE OF MODIFICATIONS
INDEX
Revision D
DATE (dd/mm/yy)
A
B
30/01/09
20/12/2010
C
11/02/2011
D
08/02/2012
DESCRIPTION
First issue, GE Energy standard including GT, ST and Gen. unit
Chapt 1, VGB references updated. Appendix F7d revised. BPA is
used for LCI instead of MBJ. System numbering cancelled and
assigned in Part C. Chapt.3.3.4.b enhanced. Chapt. 3.5. cancelled.
References to Part’s and chapters corrected. Chapter 3.2 Fn
allocation rewritten,. Appendix A, miscel.correction.
Chapter 1& 2.1: point of installation and location labelling included.
Chapter 1 included Field mounted wiring & junction boxes for
Foundation Field Bus devices & Foundation Field Bus Segment.
Electrical portion cancelled, chapter 3.3.5 makes references to Part
E. Appendix A simplified, appendix B and D completed. Appendix
C: not used replaced by blocked.
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1. PREAMBLE
It is absolutely essential for the parties participating in the construction and operation of a power plant to agree
upon a standard system for the designation and classification of the plant, its part and components.
Due to the size of power plants and the fact that the large number of parties participating are all in different
locations, communication problems arise which can incur costs which cannot be estimated in advance.
A standard designation system enables each party, irrespective of language and assignment, to identify uniformly
and unambiguously, those parts of the plant within its responsibility. The Power Station Designation System
KKS satisfies these requirements.
The planners and operators of power stations employ a common, standard system for identifying installations,
and parts thereof , with which the data required to plan, construct and operate power stations can be collected
and processed. This publication reviews the GE Power System application of the Power Station Designation
System KKS based on KKS VGB B106e edition dated 2007 & B105e PowerTech GmbH 7th edition dated 2010.
Abbreviations used
KKS
Power Station Designation System (Kraftwerk Kennzeichensystem)
VDEW
Association of German Power Stations
VGB
Technical Association of Large Power Plant Operators
DIN
German Industrial Standard
IEC
International Electrotechnical Commission
ISO
International Standard Organization
ISA
Instrument Society of America
P&ID
Piping and Instruments Diagram
I&C
Instrument and Control
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INTRODUCTION OF GE POWER SYSTEM CODING SYSTEM
The purpose of this publication is to summarise the structure, contents and application of the KKS. Illustrations
of the structure, and the code section of the VGB book without definitions, are used to describe the system.
For their internal use, GE Energy have reduced the VGB - KKS code to the specific parts for:
 conventional Gas Turbine unit,
 thermal plant,
 Combined Cycle power plants.
The scope of tasks coded in KKS includes the following wherever applicable:
Labelling on drawings of:
 GT, ST, Generator, and instrument, valves, and equipment in BOP and GE scope of supply using the
“process related” coding.
 Cubicles, panels, cabinets and junction boxes in BOP and GE scope of supply using the “process related”
coding.
 Piping.
 Interconnect Cables.
 Main machinery equipment in DCS HMI’s graphic displays.
 BOP DCS signals including group control.
 Foundation Field Bus Segment.
 Equipment in PLC's displays.
The above scope requiring KKS labelling shall be documented on the following “process related” drawings,
namely P&Ids / schematics, device summaries, one line diagram, circuit / wiring diagrams of main equipment
(GT, ST, Gen, HRSG and their associated modules), Operation and Maintenance manuals narratives, DCS
software, site cable diagrams/list.
Tagging of equipment:
 GT, ST, Generator, and instrument, valves, and equipment in BOP and GE scope of supply using the
“process related” coding.
 Cubicles, panels, cabinets and junction boxes in BOP and GE scope of supply using the “process related”
coding.
 Interconnect piping.
 Interconnect Cables.
 Field mounted wiring & junction boxes for Foundation Field Bus devices.
The above scope requiring KKS tagging consist of Name plates / Tagging on physical equipment
Tagging of the plant Control and Monitoring system :
 Turbines HMI graphics.
 DCS graphics.
 DCS Input, output and processed signal.
 PLC's graphics.
The above scope requiring KKS tagging consist of text shown on Graphics close to equipment symbols and text
in the DCS toolbox along with signal.
The following tasks are excluded of the KKS labelling/tagging:



Revision D
Tagging of wires, cards, and electrical components, etc… within cubicles, panels, cabinets or junction
boxes.
Tagging of wiring of prefabricated equipment, modules and plant components (such as GT, ST, Gen,
associated skids, etc.)
Tagging of signal, internal controls variables in control system of prefabricated equipment, modules and
plant components (such as GT, ST, Gen, etc).
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Tagging of non-functional equipment and component such as supports, civil work pedestal, blades, frames,
screws, bolts, shafts, etc.
Labelling on all documentation except those mentioned in the inclusiveness.
Document numbering based on KKS.
KKS Level 3 other than signal, and except where necessary process instruments (sensors and transmitters)
and electrical components of process mechanical equipment.
Special consideration shall be given to the following:




Revision D
The systems related to the ST, GT and their generator would be identified using the GE coding system
known as “legacy” codes. In addition, a secondary KKS functional code will be given and shown on the
P&ID’s (i.e. double identification). Similarly the field devices will also be tagged with KKS coding in
addition to the original standard GE tagging.
In the DCS all the signals transmitted from the turbine controllers will be given a code according to the KKS
identification. A cross-reference list will be provided for all signals exchanged between the turbine
controllers and the DCS. This will not be labelled on a GE P&ID.
Part ordering system will nominally be based on the GE part number or specific vendor part number for a
particular component.
For “Package Plants” such as chemical plants, compressors, auxiliary boilers, etc., which are supplied by a
vendor in accordance with his standard practice or as catalogue items, the KKS system is not fully applied.
However KKS identification is used in case of electrical or I&C interfaces of these package plants with the
rest of the plant (i.e. DCS).
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REQUIREMENTS TO BE MET BY THE DESIGNATION SYSTEM
In order to perform the tasks established, the designation systems must be capable of meeting the following
requirements:
 Determination of all installations and subsystems
 An adequate number of reserve codes must be available for future developments in power plant engineering
 Clear identification of all subsystems
 A designation used in a power plant must be unique
 Subdivision with graded details and a fixed meaning for the data characters
 Plausibility check of applied tagging, especially for data processing
 Existing standards, guidelines and recommendations must be taken into consideration
In order to facilitate the application of KKS for a project managed by a consortium of vendors, GE reserves sections
of the sequence numbers for codes used on their GT, ST and Generator drawings. These codes should be
reviewed on a project basis to ensure they are consistent with scope and reflect the plant configuration.
Exception to reserved codes could be accepted by the parties on a project basis assuring duplication does not
occur, and are explicitly outlined during the initial project agreement by all parties.
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INTRODUCTION TO KKS
2.1.
DESIGNATION AND TYPE OF DATA CHARACTERS
In consideration of the various requirements placed on the identification of plants, sections of plants and items of
equipment in power stations, KKS has three different types of code:
Process-related code
Process- related identification of systems and items of equipment according to their functions in
mechanical, civil, electrical and control and instrumentation engineering.
Used by GE Energy for every process.
Point of installation code
Identification of points of installation of electrical and control and instrumentation equipment in
installation units 'e.g. in cabinets, panels, consoles)
Mainly used by GE Energy for electrical cubicles and cables.
Location code
Identification of locations in structures, on floors, in rooms and also of fire areas.
Rarely used by GE Energy. May be used for complex installation based on location areas
The uniform composition of process related code is used by all engineering disciplines in their planning and
engineering tasks, thus ensuring effective integration of information coupled with unambiguous recognition by
all concerned.
The titles of the breakdown levels of the process related of code will henceforth be as follows:
Serial no. of
breakdown level
0
1
2
3
Process-related
identification
Total plant
System code
Equipment unit
code
Component code
Point of installation
identification
Total plant
Installation unit
code
Installation space
code
Location
identification
Total plant
Structure code
Room code
Table 1 summarises the designation and type of data characters of the breakdown levels for all three different
types of designation appearing in the KKS.
TABLE 1 : Breakdown Level Structure
Serial number of
breakdown level
Designation of
data character
Type of data
character
0
1
2
3
G
F0 F1 F2 F3 FN
A1 A2 AN
(X)
(N) A A A N N
A A N N N (A)
A3
B1 B2 BN
A A
N
N
A = Alphabetical symbols (letters, special symbols)
N = Numerical symbols (digits)
( ) = These data characters may be omitted
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X = A or N, To be coordinate with all parties
2.2.
PROCESS-RELATED IDENTIFICATION
In this type of designation the entire system is subdivided according to the function or process. The equipment
units and items must be identifiable in relation to the process.
The process-related designation is for many applications the most important designation. It permits
identification of equipment, instrumentation and signals, by location function and type.
In the mechanical, electrical and instrumentation control engineering sectors, the equipment for auxiliary
services, power supply, open-loop control, instrumentation, protection, etc., is treated as a process engineering
function.
This identification has the prefix sign "=". According to the standard, the prefix sign can be omitted provided
that the designation remains unambiguous.
3. STRUCTURE AND CONTENTS OF THE BREAKDOWN LEVELS
The individual breakdown levels of the KKS have an alphanumeric structure.
TABLE 2 : Title and contents of the breakdown levels
Breakdown levels
0
Total plant
1
Function
2
Equipment unit
3
Item
Total plant
System
code
System
Structure, floor
Structure, floor
System
System
System
System
Switchgear
Transformer
System
Equipment
unit code
Pump unit
Rolling door
Fan unit
Measuring circuit
Open-loop control
Closed-loop control
Measuring circuit
Switchgear assembly
Terminal box
Junction box
Item
code
Process-related
code
Mechanical engineering
Civil engineering
Control and instrumentation (for mechanical
and civil engineering)
Electrical and control
and instrumentation
engineering
3.1.
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Unit
Transducer
Pushbutton
Controller
Signal
BREAKDOWN LEVEL 0, TOTAL PLANT "G" & LEVEL 1, "F0"
It may be necessary to identify units, unit-free plants or expansion stages within a power station, such that a clear
and unambiguous distinction exists between them. In such a case, all parties concerned must agree upon this
designation with regards to the contents and type of data character (A or N).
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The block identifies set of main machinery as gas turbines ,steam turbines or any other type of machine set
or production plant and use two characters G F0:
G : The block identification:
G represent the block within the plant. A block is a set of units that together make a complete production
features such as a combined cycle STAG209E (two Gas turbine units, two HRSG and one Steam Turbine
unit).
F0: The unit or train identification within the block:
In power plants, data character F0 shall be a numeric character used for the numbering of the similar systems
and plants in the parts of a power station, identified with character G. F0 is part of level 1 but is associated to
G in order to clearly identify any unit or sub plant production.
G and F0 usage is as follows:
The first digit represents the power block, while the second digit is the train, with 0 representing common
equipment.
For single-shaft blocks
00
11
21
31
41
For multi-shaft blocks
00
10
11
12
13
14
20
21
22
23
24
Common system between blocks (subdivision is possible)
Single-shaft block 1 (GT, ST HRSG, & related systems)
Single-shaft block 2
Single-shaft block 3
etc.
Common system between blocks (subdivision is possible)
Steam turbine and its generator for block 1 and common
systems for block 1
First gas turbine, its generator, first HRSG and their
auxiliaries for block 1
Second gas turbine, its generator, second HRSG and their
auxiliaries for block 1
Third gas turbine, its generator, third HRSG and their
auxiliaries for block 1
etc.
Steam turbine and its generator for block 2 and common
systems for block 2
First gas turbine, its generator, first HRSG and their
auxiliaries for block 2
Second gas turbine, its generator, second HRSG and their
auxiliaries for block 2
Third gas turbine, its generator, third HRSG and their
auxiliaries for block 2
etc.
If there are single-shaft units and multi-shaft units in the same site, a combination of the above should be
used. The first character G identifies the block (single-shaft, multi-shaft or common systems) and F0 can
adopt the values indicated above, depending on the block type (single or multi-shaft). It is not necessary to
display Level GF0 on a drawing if it is clearly defined or stated in a note for the project.
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BREAKDOWN LEVEL 1, FUNCTION PREFIX NUMBER
F1, F2, F3
The alphabetical characters of this breakdown level are used to classify and divide the overall plant into
subsystems, systems or building structures. Wherever possible, all three alphabetical characters are permanently
allocated, including their associated boundary constraints and task allotment in modern power plant technology.
Please refer to Appendix A for a complete list of GE system codes.
Subdivision of systems, FN
FN numbering allows for a further breakdown and delimitation of a system so that specific sections can be
uniquely defined.
GE uses a combination of decadal and consecutive numbering based on system complexity.
Decadal numbering in subsystem has the advantages over consecutive numbering where subunits (e.g. parallel
trains) of piping systems form a subgroup.
In each system the main line is divided in decades, and, if not sufficient, with unit numbers within a decade.
Other lines (return, bypass, vent, drain, recirculating...) are numbered by unit numbers as subsystems of the
relevant decade.
Devices on a pipe run will have a matching system coding as the pipe run, except when the primary function of
the device is to actuate or influence the action of another device that falls on a pipe run in different system.
FN allocation
The table in Appendix A presents the most used systems codes F1F2F3 in a combined cycle power plant.
Pre-engineered design such as the main product has allocated rigid codes for standardization purposes and are
dispatched along with the process need. The site arrangement could defer from project to project and will induce
different configuration what may shown a non strict consecutive system ranges. More over the alternation of
scope could show alternation of F1 system codes.
Refer to the project wise Part C for exact Fn range allocation. Several ranges are devoted to GE product, to the
installation engineering and to other equipment scope owners.
.
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3.3.
BREAKDOWN LEVEL 2, EQUIPMENT UNIT A1, A2, AN, A3
3.3.1.
General
In the process-related designation the first two alphabetic characters (A1 and A2) are used to distinguish the type
of device as listed below:
Main Groups of Equipment Units, A1 :
A
B
C
D
E
F
G
H
Mechanical equipment
Mechanical equipment
Direct Measuring circuits
Closed-loop control circuits
Analogue and binary signal conditioning
Indirect measuring circuits
Electrical equipment
Subassemblies of main and heavy machinery
Refer to Appendix B. Equipment unit code A1A2.
In the process-related designation in breakdown level 2, the numerical digits (AN) typically have no classification
significance, with the exception of the items outlined in Appendix C.
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3.3.2.
Coding of process valves and pipes
The alphabetical characters assigned to piping and accessories in the second level are BR. Numbers must be,
nominally, assigned in ascending units in the direction of the main flow (increasing in the downstream
direction).
The pipeline or BR number must only be changed:
 When they have different functions from the point of view of process
 When there are changes in the process conditions (Pressure, Temperature, Flow)
 When there is a change of material
 Optionally when there is a change in diameter associating the reducer with the line of greater diameter
Changes in diameter caused by reducers for the purpose of inserting valves and instruments will be accepted, as
long as the diameter of the inlet pipe is equal to the diameter of the outlet pipe.
The number of the line (in the second level) will not be modified when elements considered as integrating parts
are installed in the line; for example, valves, temporary filters, expansion joints, restrictive orifices, flow
elements, etc.
For reserved sequence numbers (AN) for BR units refer to Appendix C.
In the field, the interconnect piping is tagged by a coloured ring over marked with the first two letters or the
three letters of the KKS system code.
a) VALVES
The process valves are identified in the first level with the code of its associated pipe (or equipment) and in the
second level with the alphabetical characters AA.
In the same respect as the sequence numbers (AN) for BR units increase, the different valves will be numbered
correlatively. An attempt will be made to adopt numbering that ascends in the direction of the main flow.
Appendix C reserves blocks of numbers (AN) specific to valve function in order to provide information
concerning the type of valve that is being denominated.
With the exception of pilot valves shown on P&IDs, which use the main valve code plus the breakdown level A3,
set to A, B, C, etc. in order of need. Refer to Appendix F, example number 5.
b) BYPASSES
In order of importance, denomination of a bypass is determined as follows:
 Consecutively within the corresponding decade in accordance with the numbering established in the
first level for the system to which they pertain (system bypasses).
 Consecutively within the corresponding unit numbering of sections in accordance with the numbering
established in the first level for the system to which they pertain (sub system or main equipment
bypasses).
 Fully integrated as part of the system to which they pertain (equipment bypasses or valve bypasses).
c)
DRAINS AND VENTS
Drains and vents are denominated in the first level as a bypass of the system to which they are designed to drain
or vent. Such denomination covers up to the last closing device or the discharge pipe to the atmosphere.
d) HEAT EXCHANGERS
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Because of their function, heat exchangers form part of at least two systems. However, because of the need to
establish single identifications, they must be assigned to just one of the systems.
Heat exchangers are assigned to the system that requires its services; the system that absorbs heat in the case of
heaters and the system that gives out heat in the case of coolers.
e) IDENTIFICATION OF PIPING SYSTEMS
The following specifications are valid for identification and representation in P&IDs:
Numbering in the first breakdown level is effected for parallel piping legs in increasing increments, counting in
the flow direction.
A hollow needle represents delimitation of the system identification in the first breakdown level (F1F2F3FN).
For better recognition of the coding delimitation, the needle is not placed directly in the branching or junction
point, but in the line concerned.
A solid needle represents delimitation of the piping identification or BR number in the second breakdown level
(AN).
Identification of the piping systems is carried out using "flags". The direction of the "flag" is to indicate the flow
direction. The flag shall contain the 1st Breakdown level. The unit code BR.. is written below the flag as
follows:
LBA10
BR010
LBA20
BR010
Flow direction
Flow direction
If two flow directions are possible, lines are placed on both ends of the box.
LBA30
BR010
Flow direction
Please refer to Appendix C for (AN) ranges for “BR” codes.
Refer to the Appendix F for specific rules and case study.
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Coding of equipment
Labelling of equipment is done in two rows or blocks on a drawing. The top block is for the level one code
(Refer to Appendix A). And the second block is for the second level code (Refer to Appendix B).
The legacy code or standard code used by suppliers, may be mentioned either in a third row or beside the tagging
block.
FH30-1
For some components such as valves, in order to keep visibility of the drawing the label may only include the
level 2 and referring to the level 1 of the system on which they are located to.
3.3.4.
Measuring Point representation in P&I Diagrams
An oblong bubble typically represents the measuring points in a plant. These bubbles have 2 lines of coding
inside them. On line 1 is the measurement type and the associated function(s) in the plant. On line 2 is the KKS
tag of the instrument.
The legacy code or standard code used by suppliers, is mentioned either in a third line or beside the bubble.
Line 1: Function letter of the measuring point
according to paragraph 3.3.4 a
Line 2: KKS level 2 – identification mark
of the measuring point
a) MEASUREMENT TYPE & FUNCTION (LINE 1)
To describe the measured variable and function, each measuring symbol is provided in line 1 with a number of
identification letters. These identification letters are determined according to ISA S5.1. The first set of letters,
identifies the measured variable. The second set of letters indicates the signal processing of the measured
variable.
The ISA table below is used as appropriate for instrumentation use only. Note: Table and standards are copyright
of Instrument Society Of America (1992). All rights reserved.
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Measuring Instruments
A
B
C
D
FIRST LETTER (GROUP 1)
MEASURED OR INITIATING
MODIFIER
VARIABLE
ANALYSIS
BURNER, FLAME, COMBUSTION
USER'S CHOICE
USER'S CHOICE
DIFFERENTIAL
E VOLTAGE
F FLOW RATE
G
H
I
J
USER'S CHOICE
HAND
CURRENT (ELECTRICAL)
POWER
K TIME, TIME SCHEDULE
L LEVEL
M USER'S CHOICE (MOISTURE)
N USER'S CHOICE
O USER'S CHOICE
SENSOR (PRIMARY
ELEMENT)
RATIO (FRACTION)
GLASS, VIEWING
DEVICE
HIGH
INDICATE
SCAN
TIME RATE OF
CHANGE
QUANTITY OR HEAT DUTY
RADIATION
SPEED, FREQUENCY
TEMPERATURE
MULTIVARIABLE
VIBRATION, MECHANICAL
V ANALYSIS
W WEIGHT, FORCE
X UNCLASSIFIED
CONTROL STATION
LIGHT
MOMENTARY
USER'S CHOICE
USER'S CHOICE
ORIFICE RESTRICTION
POINT (TEST)
CONNECTION
P PRESSURE, VACUUM
Q
R
S
T
U
SUCCEEDING LETTERS (GROUP 2)
READOUT OR PASSIVE
OUTPUT FUNCTION MODIFIER
FUNCTION
ALARM
USER'S CHOICE
USER'S CHOICE
USER'S CHOICE
CONTROL
CLOSED
LOW
MIDDLE,
INTERMEDIATE
USER'S CHOICE
OPEN
INTEGRATE,
TOTALIZE
RECORD
SAFETY
MULTIFUNCTION
WELL
UNCLASSIFIED
X-AXIS
Y EVENT, STATE OR PRESENCE
Y-AXIS
Z POSITION DIMENSION
Z-AXIS
SWITCH
TRANSMIT
MULTIFUNCTION
VALVE, DAMPER,
LOUVER
MULTIFUNCTION
UNCLASSIFIED
UNCLASSIFIED
RELAY, COMPUTE,
CONVERT
DRIVERS,
ACTUATOR,
UNCLASSIFIED FINAL
CONTROL ELEMENT
b) Measurement counting range (Line 2)
On line 2 is the KKS tag of the instrument. The tags may omit the unit number (characters GF0) as long as there
is no ambiguity for the site, and as long as the drawings are identical for several units. Counting is performed by
the use of 3 numeric characters, thus a range 001-999 is available for each measurement type.
Measurement coding is made according to Appendix C.
Primary element which is not connected and is used for on site testing, sampling, or tuning, shall be tagged in the
series of 8's.
Primary element which is connected to a local control shall be tagged in the series of 1's.
Primary element which is connected to a local instrument shall be tagged in the series of 5's.
Primary element which is connected to a remote instrument shall be tagged in the series either of 0's (ana) or 3's
(digital).
Primary element which is connected to a local and a remote instrument, shall be consider as remote as the remote
function is having a highest priority.
c)
Place of Measured Value Processing
The place of measured value processing is identified by the following symbols:
Local measured value processing/monitoring
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Measured value processing/monitoring on the local control panel or sub panel (black box)
Measured value processing in the central control room (DCS)
d) Specific rules
Refer to the Appendix F for specific rules and case study for instrumentation application.
3.3.5.
Electrical equipment
The electrical equipment are coded with A1 as “G”, refer to Appendix B. The AN sequence number does not have
a specific meaning except for the below exceptions.
Refer to part E for specific requirements for tagging electrical systems and equipment.
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3.4. BREAKDOWN LEVEL 3, ITEM B1, B2, BN
3.4.1.
General
Level 3 is further breakdown of KKS coding to designate unique components of a larger assembly as a
whole. Below is an example of a complete Blower coded as “AN” in level 2. It shows the driving motor and
the blower itself as mechanical component.
SAE43
AN001
M
-M01
88BL-2
KN01
Alphabetic characters at this breakdown level are :
Main Groups of items, B1 :
K
M
Q
X
Y
Z
-
Mechanical items
Mechanical items
Instrumentation and control items
Signal related to its origin
Signal related to its application
Signal gated (internal variable)
Electrical items
At this breakdown level the numerical digits are used for counting only.
See Appendix D for list of mechanical and I&C B1B2 codes.
See Appendix E for list of electrical B1B2 codes.
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Signals
The list of signal B1B2 codes and relevant rules of usage are described in Part F documentation.
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APPENDIX A: ELEMENTAL SYSTEMS CODE
Main Functional Groups, F1:
A
Grid and Distribution Systems
B
Power Transmission and Auxiliary Power Supply
C
Instrumentation and Control Equipment
D
Instrumentation and Control Equipment (for use only when the function codes C is
insufficient for the identification)
E
Conventional Fuel Supply and Residue Disposal
F
Handling of Nuclear Equipment
G
Water Supply and Disposal
H
Conventional Heat Generation
J
Nuclear Heat Generation
K
Nuclear Auxiliary Systems
L
Steam, Water and Gas-Cycles
M
Main Machine Sets
N
Process Energy supply for External Users (e.g. District Heating)
P
Cooling Water Systems
Q
Auxiliary Systems
R
Gas Generation and Treatment Systems
S
Ancillary Systems
U
Structures
W
Solar Systems
X
Heavy Machinery (not main machine sets)
Z
Workshop and Office Equipment
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The list below are the main systems used in the thermal Power Plant and is only
given for information. Please refer to the Part C for exact scope and assignment of
each system trigrams and system numbering.
F1 F2 F3
SYSTEMS DESCRIPTION
ACA
SWITCHYARD 380KV-420KV
ADA
SWITCHYARD 220KV-245KV
AEA
SWITCHYARD 110KV-150KV
AFA
SWITCHYARD 60KV-72KV
AGA
SWITCHYARD 45KV-50KV
AHA
SWITCHYARD 30KV-35KV
AJA
SWITCHYARD 20KV-25KV
AQA
Energy metering
ARA
GRID & DISTRIBUTION PROTECTION EQUIPMENT
ASU
GRID & DISTRIBUTION DECENTRALIZED PANEL & CABINET
AXP
Cathodic protection system
BAA
GT & ST Generator power evacuation
BAB
GT & ST Generator foundation cabinet
BAC
GT & ST Generator circuit breaker
BAT
Generator Step-up Transformer
BAU
Grounding network
BAY
Electrical Protections and Control
BBA
Normal MV switchgears
BBB
MV non segregated phase bus bars
BBT
Auxiliary Transformers
BDA
Emergency MV distribution
BDT
Emergency MV transformer
BFA
Normal LV switchgears # A
BFB
Normal LV switchgears # B
BFC
Normal LV switchgears # C
BFD
Normal LV switchgears # D
BFE
Normal LV switchgears # E
BFF
Normal LV switchgears # F
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F1 F2 F3
SYSTEMS DESCRIPTION
BFT
MV/LV distribution transformers
BJA
Normal LV motor control centres
BLA
Normal lighting switchgears
BLE
Welding panel
BLL
Normal lighting panel
BLS
Safety lighting
BLT
Normal lighting transformers
BMA
Emergency LV switchgears
BMB
Emergency LV switchgears
BMC
Emergency LV switchgears
BMT
MV/LV transformers for Emergency LV distribution
BNA
Emergency 2ndary switchgears
BNB
Emergency 2ndary switchboards
BNT
MV/LV transformers for Emergency 2ndary LV distribution
BRA
Permanent 230 V production and distribution board
BRB
Unit 230 V production and distribution board
BRT
400/230 V bypass transformers
BRU
Permanent 230 V production and distribution inverters
BTA
Up to 230 VDC production & distribution
BTB
250 V Battery
BTC
DC 48 V production and distribution
BTL
DC 125 V power production - Battery Charger
BTM
DC 250 V power production - Battery Charger
BUA
DC 125 V power distribution
BUB
DC 250 V power distribution
CAA
PROTECTIVE INTERLOCKS
CBP
Generator Synchronisation & Coupling
CCA
BINARY SIGNAL CONDITIONING
CDA
DRIVE CONTROL INTERFACE
CEA
ANNUNCIATION AND ALARMS
CFA
RECORDING, MEASUREMENTS
CGA
CLOSED-LOOP CONTROL (EXCL. POWER SECTION)
CHA
PROTECTION
CJA
UNIT CONTROL SYSTEM (overall block automation)
CJD
START UP CONTROL, SETPOINT CTRL
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F1 F2 F3
SYSTEMS DESCRIPTION
CJF
BOILER CONTROL SYSTEM
CJJ
STEAM TURBINE CONTROL CABINET
CJP
GAS TURBINE CONTROL CABINET
CJY
UNIT CONTROL SYSTEM SAFETY (overall block automation)
CKA
ON LINE AND DIAGNOSTIC COMPUTER
CKJ
ACCESS CTRL COMPUTER
CSA
DCS I/O CABINETS
CSY
DCS I/O CABINETS for SAFETY
CVA
marshalling boxes and cubicles
CWA
Control room: control consoles
CWF
Control room: control panels
CWQ
Control room: printers
CXA
LOCAL CONTROL STATIONS
CYA
Telephone system
CYB
Loudspeaker System
CYD
Data Communication Systems
CYE
Fire fighting control system
CYF
Time distribution, clock system
CYQ
Gas detection system
CYN
Interphone
EGA
Fuel-oil unloading
EGB
Fuel-oil storage
EGC
Pumping system
EGD
Fuel-oil piping
EGS
Fuel-oil treatment
EGT
Heating medium system
EKA
Inlet Pipe line
EKC
Heating
EKD
Gas feeding (Common site gas station, RMS)
EKE
Gas scrubber
EKG
Gas piping
EKH
Main pressure boosting system
EKT
Gas heating (CC) (gas heater) (heating media (systems)
GAC
Piping. Tank connection = Raw Water System
GAD
Water pump tank
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F1 F2 F3
SYSTEMS DESCRIPTION
GAF
Raw water pumping (intake) (Pumping)
GBK
Water treatment system
GCF
Reverse osmosis + EDI aux. Equipment
GCN
Chemical dosing water treatment plant
GDD
Pretreatment and aux. Equipment
GDF
Reverse osmosis system and aux. Equipment
GDQ
Potable water production plant
GHA
Service water
GHC
Demineralised water storage and distribution
GKB
Drinking water
GMA
Waste Water (Oily)
GMB
Miscellaneous Process Water Drains and Blowdown
GMT
Process drainage system (GT water wash drain)
GNK
Process drain treatment
GRK
waste water treatment
GUA
Rain water collection and drainage
HAC
HRSG economiser
HAD
HRSG evaporator
HAG
HRSG circulation
HAH
HRSG Superheater
HAJ
HRSG reheat steam
HAN
HRSG Pressure system drain and venting
HB’s
HRSG Support, structure, enclosure and interior
HBK
HRSG interior
HC’s
HRSG soot blowing and flushing
HD’s
HRSG ash and slog removal
HH’s
HRSG main firing system
HJF
HRSG fuel oil preparation and recovery
HJG
HRSG Gas Pressure Reduction And Distribution
HJQ
HRSG burners sealing air and flame scanner cooling
HLB
HRSG forced draught fan system
HNA
HRSG Exhaust Ducting system
HNE
HRSG Outlet stack
HNY
HRSG Flue gas exhaust control and protection equipment
HSJ
HRSG NOx catalytic reduction
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F1 F2 F3
SYSTEMS DESCRIPTION
HYA
HRSG control and protection
HYC
HRSG safety
HYR
HRSG analogue control and instrumentation
LAA
Feedwater Storage and deaeration
LAB
Feedwater piping
LAC
Feedwater pumping
LAE
HP Desuperheating
LAF
IP Desuperheating
LAV
Lubricant supply
LAW
Sealing fluid supply
LBA
Main steam
LBB
Hot reheat steam
LBC
Cold reheat steam
LBD
Extraction / Low pressure steam
LBG
Auxiliary steam distribution
LCA
Condensate piping
LCB
Condensate pumps
LCC
Main condensate heating system
LCE
Condensate desuperheating spray system
LCP
Condenser make-up (Stand by condensate system storage and piping)
LCR
Stand by condensate system distribution
LD’s
Condensate polishing plant
MAA
Steam turbine itself (HP Part)
MAB
Steam turbine ( IP Part)
MAC
Steam turbine ( LP Part)
MAD
Steam turbine Bearings
MAG
Main Condenser
MAJ
Condenser vacuum
MAK
ST Standby turning gear
MAL
Steam and Drains
MAN
Turbine bypass station
MAP
Turbine bypass piping and steam dump
MAV
ST lubrication, jacking oil
MAW
ST Turbine gland steam sealing
MAX
ST control fluid skid for governing & protection
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F1 F2 F3
SYSTEMS DESCRIPTION
MAY
ST protection
MBA
Compressor and Turbine itself (if MBC not used)
MBB
Turbine casing and rotor
MBC
Compressor casing and rotor
MBD
Bearings
MBE
Coolant System
MBH
Cooling and sealing gas system
MBJ
Start-up unit and static frequency converter
MBK
Transmission gear (incl Turning gear)
MBL
Intake air, cold gas system (open cycle)
Anti icing
Bleed heating
MBM
Combustion Chamber
MBN
Liquid Fuel System
MBP
Fuel-gas system
MBR
Exhaust gas
MBT
Motive gas generation unit
MBU
Additive system
MBV
GT and generator lubrication/oil transfer and vent
MBW
Sealing oil supply system
MBX
Control fluid
MBY
Logic and analogue control
MKA
Generator complete
MKC
Generator excitation & automatic voltage regulator
MKD
Generator Bearings
MKF
Generator stator and rotor liquid cooling
MKG
Generator H2 cooling
MKH
ST generator Nitrogen cooling system
MKQ
Generator exhaust gas system
MKV
Generator lubricant oil system
MKW
Generator sealing fluid supply
MKX
Generator fluid supply system for control
MKY
Generator protection system (mech protection which trip Generator)
MV’s
Lube oil treatment system
NAA
Piping system (steam)
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F1 F2 F3
SYSTEMS DESCRIPTION
NAB
Piping system (condensate)
NAD
Process heat transmission system
NDA
Piping system (forward)
NDB
Piping system (return)
NDC
Process hot water pump system
NDD
Process heat transfer
NDE
Hot water storage system
NDF
Distribution system
PAA
Main Cooling water filtration
PAB
Main cooling Piping
PAC
Main Cooling water pumping
PAD
Outfall Cooling system
PAE
Cooling Tower
PAH
Condenser cleaning system
PAR
Make up water piping system
PAS
Make up water pump system
PBN
Main Cooling water chemical supply system (conditioning)
PCA
Intake and cleaning facilities
PCB
Piping
PCC
Pumping
PCD
Cooling tower (secondary cooling)
PGB
Piping
PGC
Pumping
QCA
O2 scavenger system
QCB
Amine system
QCC
Phosphate system
QCD
Corrosion inhibitor system
QCE
Antifreeze agent system
QFA
Instrument and Control air production (if separate from SCA)
QFB
Instrument and Control air distribution
QHA
Auxiliary steam production (auxiliary boiler)
QHE
Blowdown system, flash drain system
QHH
Auxiliary boiler burners
QJA
Nitrogen storage and distribution system
QJB
Hydrogen storage and distribution system
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F1 F2 F3
SYSTEMS DESCRIPTION
QJC
CO2 storage and distribution system
QLB
Auxiliary steam distribution ( from auxiliary boiler)
QUA
Chemical control and sampling
RSA
Condensing and feed water heating plant cleaning (temporary)
RSB
Steam blowing piping (temporary)
RSC
HRSG cleaning (temporary)
SAA
Building ventilation
SAC
ST generator and compartment ventilation
SAD
ST forced air cooling
SAE,SAF
GT and generator compartment ventilation
SAK
Building air conditioning, heating and ventilation
SAL
GT control compartment air conditioning
SAM
Turbine hall ventilation
SAU
Building heating
SBB
Electrical heat tracing
SCA
Compressed air production
SCB
Service air distribution
SCC
Stationary compressed air system
SDL
(Lube oil cleaning)
SDP
(Liquid fuel purges)
SDT
(Washing skid and distribution)
SGA
Fire fighting water systems
SGC
Spray deluge systems
SGE
Sprinkler systems
SGG
Tank roof, tank shell cooling system
SGJ
CO2 fire fighting systems
SGK
Gaseous clean agents fire fighting systems (FM200)
SGL
Powder fire fighting system
SGY
Control and detection system
SMA
Cranes and Hoists Steam turbine & Generator
SMB
Cranes and Hoists Gas turbine
SMC
Cranes and Hoists
SNA
ELEVATORS
SQA
ROAD INSTALLATION
STA
WORKSHOP, LABORATORY EQUIPMENT
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F1 F2 F3
SYSTEMS DESCRIPTION
UAA
Structures for Switchyard structures
UBA
Structures for Switchgear building
UBE
Structures for MV aux transformers
UBF
Structures for Generator transformers
UBG
Structures for Start up transformer
UBH
Structures for Oil collecting pit
UCA
Plant control room building
UCB
Control station building
UEJ
Structures for Liquid fuel facilities
UEN
Structures for Gas fuel facilities (except Regulating and Metering Station)
UER
Structures for Gas fuel facilities (RMS)
UGA
Structures for Raw water supply
UGC
Structures for Waste water
UGD
Structures for demineralised water
UGF
Structures for fire protection water
UGG
Structures for drinking water
UGH
Structures for rain water
UGU
Structures for effluents
UHA
Heat recovery steam generator structures
UHB
Heat recovery steam generator enclosure structures
UHN
Smoke stack and chimney Str.
UHW
HRSG blowdown Str.
ULA
Structures for feedwater pumps house
UMA
Structures for Steam turbine
UMB
Structures for Gas Turbine
UMC
Main Turbine Hall
UMJ
Diesel generator building
UPC
Structures for Circulating cooling water intake
UQA
Structures for Circulating and Cooling water pump house
URA
Structures for Cooling towers and basin
URD
Structures for Cooling tower water pump house
URE
Structures for towers auxiliary services building
USA
Structures For HVAC
USC
Structures For Compressed air
USD
Structures For Ancillary Systems free for use
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F1 F2 F3
SYSTEMS DESCRIPTION
UTH
Auxiliary boiler building
UYA
Structure for Offices building
UYF
Structure for access control building, gate house
UZA
Roads, paths
UZJ
Fences
UZJ
Outdoor area
XKA
Emergency LV power supply
XKB
Emergency MV power supply
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APPENDIX B: EQUIPMENT UNIT CODE
Main Groups of Equipment Units, A1:
A
Mechanical equipment (with moving parts)
B
Mechanical equipment (without moving parts)
C
Direct Measuring circuits
D
Closed-loop control circuits
E
Analogue and binary signal conditioning
F
Indirect measuring circuits
G
Electrical equipment
H
Subassemblies of main and heavy machinery
A1 A2 :
A
AA
KKS DESIGNATION
Mechanical equipment:
Valves, dampers, etc., incl. actuators, also manual; rupture disk
equipment
AB
AC
AE
AF
AG
AH
AM
AN
AP
AS
AT
Isolating element, air locks
Heating, cooling and air conditioning units
Turning, Driving, Lifting, and slewing gear
Conveyors
Generator unit
Heating, cooling and air conditioning unit
Mixer, agitators
Compressor units, fans
Pumps units
Adjusting and tensioning equipment for non-electrical variables
Cleaning, drying, filtering and separating equipment
AU
AV
AW
AX
Braking, gearbox, coupling equipment, non electrical converters
Combustion equipment
Stationary tooling, treatment equipment
Test and monitoring equipment for plant maintenance
A1A2
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EXAMPLES
hand valve, check valve, pressure
safety valve, solenoid valve,
motorised-valve, operated
valve
Heat exchanger,
Filter, Separators, knock out
drum.
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BB
BE
BF
BN
BP
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BQ
BR
BS
BU
C
CD
CE
Mechanical equipment:
Storage equipment
Shafts (for erection and maintenance only)
Foundations
Jet pumps, ejectors, injectors
Flow restrictors, limiters (incl. rupture disk equipment), orifices (not
metering orifices)
Hangers, support, racks, piping penetration
Piping, ductwork, chutes
Silencers
Insulation, sheathing
Direct measuring circuits
Density
Electrical variables
CF
Flow, rate
CG
Distance, length, position, direction of rotation
CH
CK
CL
Manual input as manually operated sensor
Time
Level (also for dividing)
CM
CP
Moisture, humidity
Pressure
CQ
Quality variables (analysis, material properties), other than CD, CM,
CV
CR
CS
CT
Radiation variables
Velocity, speed, frequency (mechanical), acceleration
Temperature
CU
CV
CW
CX
CY
D
E
F
G
GA
GB
Combined and other variables
Viscosity
Weight, mass
Neutron flux
Vibration, expansion
Closed loop control circuits
Analog and binary signal conditioning
Indirect measuring circuits
Electrical equipment:
Junction boxes and cable/bus bar penetrations
Junction boxes and cable/bus bar penetrations
GC
Junction boxes and cable/bus bar penetrations
GD
Junction boxes and cable/bus bar penetrations
Revision D
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vessels and storage tanks
Current, voltage, energy,
frequency
flow transmitter, flow meter, flow
switch, flow orifice, flow
venturi, flow valve, flow
controller
position transmitter,
potentiometer, end switch
Fire manual call point
level control valve, level
transmitter, level gauge, level
switch, level controller
dew point transmitter
pressure transmitter, gauge,
switch, pressure controller,
pressure valve
CO2 concentration in flue gas,
contaminant concentration
Partial discharge measurement
Shaft line measurements
temperature transmitter,
thermocouple, temperature
switch, glass thermometer,
wells, temperature controller,
temperature valve
corrected values
(2)
(2)
(2)
For voltage over 1kV (1)
For voltage equal or less than
1kV (1)
Contain at least a control signal
(1)
Contain at least a conventional
instrument signal (1)
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GE
Junction boxes and cable/bus bar penetrations
GF
GG
GH
Junction boxes and cable/bus bar penetrations
Junction boxes and cable/bus bar penetrations
Electrical and instrumentation and control installation units identified
as per process system (e.g. cubicles, boxes)
GK
Information display and operator ctrl equipment for process computers
and automation systems
GL
GN
GR
GS
Limiting equipment
Network equipment
DC generating
Electrical equipment: switchgear equipment (if not identified under
process equipment)
Transformer equipment
GT
GU
GV
GW
GZ
Convector equipment
Structure-related earthing and lightning protection equipment, surge
arrestors
Power supply equipment
Hangers, supports and racks for electrical and instrumentation and
control equipment
Contain Frequency based signals,
serial links, networks,
FFB,etc. (1)
Not used
Not used
Generic electrical and electronic
enclosure, cubicles, cabinet,
panel,etc. (1)
Printer, Video screen, Keyboards,
Computer drive, Operator
station or interface unit
Battery, rectifier
Voltage transformer
Current transformer
Winding, Coil
surge arrestor, surge capacitor
Frame, Enclosure, support, field
instrument panel
(1) Refer to Part E
(2) Refer to Part F
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APPENDIX C:
AN RESERVED COUNTING RANGES
AA Counting range
Valve type
001-199
200-299
300-399
400-499
500-599
600-699
700-799
800-899
900-999
Main manual or process check valves
Pneumatic & Hydraulic control valves (regulating or on/off)
Motor-driven process valves
Electric process valves
Manual drain and vent valves
Self-regulating valves (pressure, temperature, level, etc.)
Instrument root valves
blocked
Safety and relief valves
BR Counting range
Type of Piping
001-199
200-299
300-399
400-499
500-599
600-699
700-799
800-899
900-999
Main process, any type
Drain & Vent, any type
Instrument as long piping run
Sample & metering
test
blocked
blocked
blocked
blocked
Cx Dx Counting range
Measurement type
001-099
100-199
200-299
300-399
400-499
500-599
600-699
700-799
800-899
900-999
Remote Analog
local control
blocked
Remote Binary (or local with)
blocked
Local indicator/gauge
blocked
blocked
test tapping point
Combined data
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APPENDIX D:
MECHANICAL COMPONENT B1B2 CODE
KKS DESIGNATION
A1A2
K
KA
KB
KC
KD
KE
KF
KJ
KM
KN
KP
KT
KV
KW
M
MB
MF
MG
MK
MM
MQ
MR
MS
MT
MU
Q
QB
QH
QN
QP
QR
QS
QT
Remarks
Mechanical component:
Valves, dampers, cocks, rupture disks, orifices.
Gates, doors, dam boards
Heat exchangers, coolers
Vessel, tank, pools, surge tank
Turning, Driving, Lifting, and slewing gear
Continuous conveyors, feeders
Size reduction machines
Compacting, packaging machines
Compressors, blowers, fans
Pumps
Cleaning, machines, dryers, separators, filters
Burners, grates
Stationary tooling and treatment machines for maintenance
Mechanical component:
Brakes
Foundations
Gear boxes
Clutches, couplings
Engines, not electrical
Permanent connection
Piping components, ductwork components
Positioners, not electrical
Turbines
Transmission gear, non electrical, converters and boosters other than
couplings and gearboxes
Instrumentation and control component (non electrical)
Sensor if not structurally integral with *QP*, metering orifices
Signalling devices
Controllers, fly bolt governor
Measurement instruments, testing equipment
Instrument piping
Condensation chambers (datum reservoir) in measuring circuits
Thermowells and pockets for protection of sensors
Revision D
Issue date 08/02/2012
globe valve, gate valve,
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APPENDIX E:
ELECTRICAL COMPONENT B1B2 CODE
B1B2
KKS DESIGNATION
-A
Electrical components: assemblies and subassemblies
-B
Electrical components: transducers for non-electrical to electrical variables and vice-versa
-C
Electrical components: capacitors
-D
Electrical components: binary elements, delay devices, memory devices
-E
Electrical components: special components
-F
Electrical components: protective devices
-G
Electrical components: generators, power supplies, inverters
-H
Electrical components: signalling devices
-K
Electrical components: relays, contactors
-L
Electrical components: inductors
-M
Electrical components: motors
-N
Electrical components: amplifiers, controllers
-P
Electrical components: measuring instruments, testing equipment
-Q
Electrical components: power switchgear
-R
Electrical components: resistors
-S
Electrical components: switches, selectors
-T
Electrical components: transformers
-U
Electrical components: modulators, convertors from electrical to other electrical variables
-V
Electrical components: tubes, semiconductors
-W
Electrical components: transmission paths, waveguides, aerials
-X
Electrical components: terminals, plugs, sockets
-Y
Electrical components: electrical positionners, e.g. Solenoids (not motor)
-Z
Electrical components: terminations, balancing equipment, filters, limiters, cable terminations,
equalizers, hybrid transformers
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Issue date 08/02/2012
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APPENDIX F:
EXAMPLES IN USE AND CASE STUDY
1° Redundant instrument:
Redundant instrument measuring the same processing value are
segregated by the A3 code
MBP70 CP003A redundant remote pressure measurement
MBP70 CP003B redundant remote pressure measurement
MBP70 CP003C redundant remote pressure measurement
2° Measurement of identical process value used in different control loops:
Multiple instrument at the same point of installation measuring values used for different
control loops or controllers, they are differentiated by the AN code.
MBP70 CG311 limit switch closed
MBP70 CG312 limit switch open
3° Multiple measuring circuits housed in the same body
This pertains to thermocouple having several sensors housed in the same body in order to get a back up instrumentation
in case of failure of the main. This is avoiding dismantling the thermocouple by stopping the system. Each sensor is a
component of the thermocouple and is tagged as follow on circuit diagrams:
MBP70 CT001–B01
MBP70 CT001–B02
MBP70 CT001–B03
In the P&ID’s this thermocouple is shown as a unique control point as MBP70 CT001.
4° Equipment or Piping mounted in parallel:
The example codes below show the different methods for changing coding for items in parallel on a P&ID.
Example for Piping Line, 3 pipes in parallel depending on the importance of the lines it will change the Level 1 (decade
or unit) or the level 2:
MBA10 BR001
MBA20 BR001
MBA30 BR001
Revision D
OR
MBA11 BR001
MBA12 BR001
MBA13 BR001
OR
MBA11 BR001
MBA11 BR002
MBA11 BR003
Issue date 08/02/2012
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Example for Equipment: (3 pumps in parallel)
MBA10 AP001
MBA20 AP001
MBA30 AP001
OR
MBA11 AP001
MBA12 AP001
MBA13 AP001
OR
MBA11 AP001
MBA11 AP002
MBA11 AP003
5°Change in system coding for actuating instruments (pilot valves)
6° example of a relief valve and relevant lines
7° example of ISA coding
a) A pressure switch on a pressure very high alarm.
PSAHH
LBA10CP101
b) A level transmitter used to make a remote indication.
LTI
LBQ20CL001
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c) A temperature switch used to make an alarm and an automatic control:
TSLH
LBQ20CT101
d) A thermowell for maintenance
TW
LBQ20CT801
e) A pressure gauge
PI
LBQ20CP121
8° Instrumentation Valves
The piping valves are always shown on the P&ID.
Instrumentation valves could be omitted on the P&ID. (Implicit Instrumentation component) if considered as a
component of the instrument
PI
LBA11CP001
PSH
LCQ20CP301
LBA11
AA702
Piping Limit
LBA11
AA701
LCQ20
AA701
LBA11
BR010
Revision D
TI
LCF10CT551
LCQ20
BR010
Issue date 08/02/2012
LCF10
BR010
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