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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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This code is subject to agreement between the parties to the project. Control and instrumentation equipment which serves more than one main group may be identified under main group C for control and instrumentation, e.

oks If the letters available are insufficient, FN may be used. A breakdown level 2 is used to identify the installation space. Feed water system Control and protection system for steam, LY.

Identification System for Combined Cycle Power Plant (KKS coding)

Current members of the technical committee are: The alphabetical symbols of this breakdown level are used to classify and divide the overall plant into subsystems, systems or building structures. Numbering starts anew when one of the preceding code elements changes.

Supply systems which serve only one equipment unit are identified on an equal footing as subsystems of ccodification system in which they are installed. 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. D — Loop control circuits QCG Central chemical supply free for use e. Drains and vents are identified as far as the final isolation 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.

The individual breakdown levels are differently formatted. Steam, water, gas cycles CJA common to H. Subsequent isolation and pressure equalization valves in the measuring circuit are components of the measuring circuit and therefore classified as KA.

KK standard codification

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: Originally the titles of the breakdown levels were based on the process-related code: Structure-related identification is expedient where different systems are held by shared supports.

V Lubricant supply system W Sealing fluid supply system X Fluid supply system for control and protection equipment. The outdoor area is designated in the breakdown level 1 by symbols: Remember me on this computer. For this purpose, data character B1 can contain: Room Code The room code serves to identify physically separate and fictitious rooms in structures and in the outdoor area. YB81 XB82 Auto; close, down Installation zone X Grid zone Installation zone Y.

G — Electrical devices C — Instrumentation and control systems The result was a series of operations whose sequence was often irrational. 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 command termination for final control elements.

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P — Cooling water systems Q — Auxiliary systems If this is not the case, all floor numbering codes of the total plant must be written uniformly with three data characters in AN. No one of these symbols can be omitted.

Spaced notation promotes the comprehensibility and mnemonic quality of codes. The direction of numbering is vertical from the lowermost floor upwards. Introduction Breakdown level 1 System function Serial no. In this type of code, the breakdown level 2 contains equipment unit code. H — Conventional heat generation Requirements to be met by the Identification System To perform the set tasks the Identification system must be capable of satisfying the following requirements: System One should remember, that the code of a system must consist of five symbols: Measuring Circuits Measuring circuits comprise analog signal acquisition, conditioning, distribution and measured data recording and indicating processing elements.

The numerical digits count and subdivide the unit e. Rules on the Keys The Equipment Unit identified in breakdown level 2 belongs always to the System designated in breakdown level 1.

KKS Identification System for Power Plants – Function and Type

In such instances the first character of FN has a classifying purpose. Equipment Codificatjon Code Equipment Unit Code consists of two letters, three digits and sometimes one additional letter data character A3 which can be omitted. Redundant zeros must be written e.

Increased unit sizes, higher rates of automation and further developments in power-plant technology, coupled with the demands made on classification systematics by power plant operators, all called for a uniform and total solution of the classification problem.