The KKS system is a classification system for the complete power plant and its components and provides a common language for the designer. IDENTIFICATION SYSTEM KKS Chapter I KKS Guidelines and Total Plant Key Chapter II Function Key Chapter III Equipment Unit Key Chapter IV Component. I have a query which states: One of my client using KK standard codification for P&ID In KKS Codification of P&IDs, the line tag, instrument tag and valve tag.

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The origin and development of KKS X — Heavy machinery not main machine sets For this purpose, data character B1 can contain: EZ Protection For example: This draws clear divisions between power plant installations and systems, and takes full account of the needs of manufacturers, operators, inspectors and other authorities as well as the technical requirements of the mechanical engineering, process engineering, civil engineering, and electrical and control engineering sectors.

Point of Installation Identification Identification of points of installation of electrical and instrumentation equipment in installation units e.

E — Conventional fuel supply and residues disposal Steam system common to LA.

Identification Samples CKA Generally valid rules on the use of FN numbering are not expedient. Every control loop and every closed-loop control circuit comprises measuring, control and positioning elements regardless of whether electrical, pneumatic, hydraulic or other items of corification are used.

Main machine sets Given the possibilities shown in the table, it is codificaation practicable to meet all possible requirements for identification of discrete process-related function e. Total plant Serial no. A — Mechanical equipment Coding letters and designations of the main groups A1 as given in the Equipment Unit Key: System-related identification is expedient where the supported items are positively assignable to one system.

On breakdown level 2, the individual windings are classified but not on a phase-specific basis by means of GT for transformer equipment and numbered starting on the high-voltage side.


The AN number of breakdown level 2 is used to number the items of equipment classified in A1 and A2. The s character may be omitted if no structure in codificatin total plant comprises more than 99 rooms. Such established grid after addressing can state the coordinate system. Room Codificatipn by Numbering Serial no. Notation of Codes The code may be written with or without spacing but in such cldification way that it cannot be misinterpreted. Order according to voltage levels, counted from higher voltages to lower.

The result was a series of operations whose sequence was often irrational.

KK standard codification

Requirements to be met by the Identification System To perform the set tasks the Identification system must be capable of satisfying the following requirements: Special Rules for Civil Engineering The second character of FN numbers the cubicles. The AN codidication must consist of three digits. FN numbering is governed by the following principles: This rule does not refer to direct measurement circuits, which apply to technical installation and physical variable.

Additional numbering code Serial no.

KKS Identification System for Power Plants – Function and Type

cidification If this is not the case, all floor numbering codes of the total plant must be written uniformly with three data characters in AN. Control and Instrumentation Equipment I – 5. System One should remember, that the code of a system must consist of five codificatkon In this application, however, a suitable identifier such as a prefixed Y should be used to indicate that a software coding unit is concerned, thus to rule out confusion with process-related codes.

The additional code is not an alternative code for the components identified under breakdown level 3. Equipment unit code consists of 2 letters data characters A1 and A23 digits data characters AN and sometimes 1 letter data character A3 which can be, and often is omitted. Closed-Loop Control Circuits The principles for the identification of measuring circuits apply analogously to the identification of closed-loop control circuits on breakdown level 1.

B — Mechanical equipment Installation Space Code Serial no. QCG Central chemical supply free for use e. Thus for example, it may be necessary to use items which are identified differently on breakdown level 1 main system and associated parts of auxiliary and ancillary systems in order to fulfil a given process-related task functional group.


Redundant zeros must be written. Where several mechanical systems identified differently in data characters F2 and F3 are connected to one mechanical service system, the following code letters are used for the service systems on breakdown level 1 in the data characters concerned as follows: It is one digit which identifies one from two or more identical subsystems in the overall plant. Subdivide for this aim the panel elevation into planes: Skip to main content. P — Cooling water systems Process-Related Identification Process-related identification of systems and items of equipment according to their function in mechanical, civil, electrical and control and instrumentation engineering.

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. There are also cases of deviations consisting in using the dividing symbol twice, and AN, e. Gated analog signals representing physically similar direct measured variables are identified by means of a set number, e.

X Signal origins Y Signal applications Z Gated signals No generally valid rules have been made for signal and application areas. Supply systems which serve only one equipment unit are identified on an equal codificayion as subsystems of the system in which they are installed.

Further applications are subject to agreement between the parties to the project. Equipment unit identified in breakdown level 2 belongs always to a system identified in breakdown level 1.