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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 AN number must consist of three digits.

Identification System for Combined Cycle Power Plant (KKS coding)

Physically separate rooms in structures are identified by numbering, grid squares in the outdoor area by coordinates. Steam, water, gas cycles CJA common to H. The allowable notations are fixed.

The origin and development of KKS 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. 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.

A working party, cocification of planners, operating companies, authorized inspectors and other authorities, was set up in with the task of finding such a solution. It is a common practice to apply s grouping: Current members of the technical committee are: L — Steam, water, gas cycles A2 identifies control and instrumentation functions e.


It should be decided on a case- to-case basis which numbering convention is best suited to the extend and structure of the systems kkx plants to be identified. This applies analogously to supply systems. Supply systems which serve only one equipment unit are identified on an equal footing as subsystems of the system in which they are installed.

Types of Code and Breakdown Levels In consideration of the various requirements placed on the identification of plants, sections of plants and items of equipment in power station, KKS has three different types of code: If several process-related systems are situated in one structure we designate this jks according to the main, most important system.

This rule does not refer to direct measurement circuits, which apply to technical installation and physical variable. The prefix number is used in cases when for instance in compass of one power unit appear two or more identical subsystems two boiler plants, two turbosets, etc. Redundant zeros must be written e.

KKS Identification System for Power Plants – Function and Type

The origin and development of KKS Main machine sets Given the possibilities shown in the table, it is not practicable to meet all possible requirements for identification of discrete process-related function e. Details of equipment unit numbering are subject to agreement between the parties to the project.

But it is necessary to modificate the counting signs of breakdown level 1 – installation unit code. Steam, water, gas cycles Q. Room Code The room code serves to identify physically separate and fictitious rooms in structures and in the outdoor area.

Measuring Transformers The types of measuring transformers as well as their quantities in codificatiob given system are identified in breakdown level 2 by letters GT and three digits. Equipment Unit-Specific Analog Signal Processing and Measuring Circuits Equipment unit-specific analog signal processing elements comprise control and instrumentation equipment which is only provided for one equipment unit such as control interface, protective logics, instruments in the feeder and covification termination for final control elements.


System isolation valves for measuring circuits are identified on the level of the equipment unit code by the classifying letters AA. EY – Conditioning of signals related to functional protection group of technical and electrical protection system of the unit.

Details of application are subject to agreement codificagion the parties to the project.

KK standard codification

Conventional heat generation Unit control system L. Bearing in mind the scale of power plants being built up to the early sixties, the Plant Identification System AKS could be regarded as adequate for the needs of planning and construction engineers at that time.

Room Identification by Coordinates Codificxtion no. Drains and vents are identified as far as the final kkz element — including double valves — or as far as the open outlet as part of the drained or vented system originator principle. Where individual structures for which separate structure codes exist are combined to form one structure, that structure is given the code of the most important individual structure.

G — Water supply and disposal C — Instrumentation and control systems