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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KK standard codification

For example maximum of a few direct measured variables: 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. Equipment unit classification Serial no. The prefix number is used codidication cases when for instance in compass of one power unit appear two or more identical subsystems two boiler plants, two turbosets, etc. This is subject to agreement between the parties to the project.

L — Steam, water, gas cycles In this type of code, the breakdown level 2 contains equipment unit code. Generally valid rules on the use of FN numbering are not expedient. Coding letters of the main groups F1 are specified on next and the subdivisions in F2 and F3 are given in the present chapter II. Numbering starts anew when one of the preceding code elements changes.

F — Indirect measuring circuits Junction Codiffication On breakdown level 1, junction boxes receive the code of the structure and floor on which they are installed.

Details of equipment unit numbering are subject to agreement between the parties to the project. S — Ancillary systems Further applications are subject to agreement between the parties to the project. The contents of this designation in KKS, is left for coordination for particular power plant.


CF means the twelfth local measuring circuit of fluid flow the code CF12 is not correct. Kraftwerk – Kennzeichen – System KKS was published in 1st edition by the VGB and is now the basis for the designation of installations and subsystems in power plants.

N — Process energy supply for external users e. QCU Central chemical supply free for use e. M — Main machine sets Requirements to be met by the Identification System To codifixation the set tasks the Identification system must be capable of satisfying the following requirements: Coding letters and designations of the main groups A1 as given in the Equipment Unit Key: General Notes I – 5.

Identification System for Combined Cycle Power Plant (KKS coding)

The allowable notations are fixed. EA – Conditioning of signals related to functional control group. R — Gas generation and treatment For this purpose, data character B1 can contain: The first digit is often used to point the kind sort of component designated in B1 B2.

The flag points in the direction of fluid flow. In case of single codififation regulation circuits, it is divided into 2 parts: Control and instrumentation equipment which serves more than one main group may be identified under main group C for control and instrumentation, e. Redundant zeros must be written e. On breakdown level codiffication supports should be identified by BQ.

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.

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. Control and Instrumentation Equipment I – 5. F3 of the principal process-related task.


Equipment Unit Identification In the process-related code which is the most important and mostly applied type of codes in every branch of engineering, the entire system is subdivided according to the function or process. Click here to sign up.

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

Component codification and identification systems|INIS

Drains and vents are codificztion 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. Control and Instrumentation Equipment System numbering must consist of two digits. Details of application are subject to agreement between the parties to the project.

Main machine sets common to L. A — Mechanical equipment Bearing in mind the scale of power plants being built up to the early sixties, the Plant Identification System AKS could be regarded kke adequate for codivication needs of planning and construction engineers at that time. AL According to cubicles, divisions, sections etc. Special Rules for Civil Engineering In the meantime, the AKS has been adopted as the main system of identification in a number of conventional and nuclear plants.

If several process-related systems are situated in one structure we designate this structure according to the main, most important system. Any combination of alpha and numerical symbols appropriate to the requirements is acceptable for the identification of connections.