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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Skip to main content. Log In Sign Up. The origin and development of KKS Requirements to vodification met by the Identification System Types of Code and Breakdown Levels Format of Breakdown Levels Point of Installation Identification Rules on the Keys Special Rules for Mechanical Engineering Special Rules for Civil Engineering Control and Instrumentation Equipment A – Grid and distribution systems for electric power plants, thermoelectric power plants and heating plants B — Power transmission and auxiliarY electrical power supply C — Instrumentation and control systems D — Control systems E — Conventional fuel supply and residues disposal G — Water supply and disposal H — Conventional heat generation L — Steam, water, gas cycles M — Main machine sets N — Process energy supply for external users e.
P — Cooling water systems Q — Auxiliary systems R — Gas generation and treatment S — Ancillary systems W — Renewable energy plants X — Heavy machinery not main machine sets Z jks Workshop and office equipment A — Mechanical equipment B — Mechanical equipment Kis — Direct measuring circuits D — Loop control circuits E — Binary and analog signal and variable conditioning F — Indirect measuring circuits G — Electrical devices H — Subassemblies of main and heavy machinery Introduction Identification System is based on the Kraftwerk – Kennzeichen – System KKS This System is the basis for the standard and clear identification of all installations and subsystems in power plant.
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. 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 planning, construction and operation of power plants was based in the past on attempts to identify installations and parts kka by means of differing incompatible systems.
The result was a series of operations whose sequence was often irrational. 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.
In the meantime, the AKS has been adopted as the main system of identification in a number of conventional and nuclear plants.
Identification System for Combined Cycle Power Plant (KKS coding)
Increased unit sizes, higher rates of automation and further developments in power-plant codifciation, coupled with the demands made on classification systematics by power plant operators, all called for a uniform and total solution of the classification problem. A working party, consisting of planners, operating companies, authorized inspectors and other authorities, was set up in with the task of finding such a solution. 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.
Kraftwerk – Kennzeichen – System KKS was codicication in 1st edition by the VGB and is now the basis for the designation of installations and subsystems in power plants. Current members of the technical committee are: Requirements to be met by the Identification System To perform the set tasks the Identification system must be capable of satisfying the following requirements: Format of Code I – 2.
Types of Code and Breakdown Levels In consideration of the various kke placed on the identification of plants, sections of plants and items codiication equipment in power station, KKS has three different types of code: These types of code are distinguished ckdification means of prefix and breakdown symbols. These three types of code use the same identification scheme, which is subdivided into four breakdown levels.
Originally the titles of the breakdown levels were based on the process-related code: The prefix symbols may be omitted if the information contents of the codes remain unambiguous.
Format of Breakdown Levels The code is made up of breakdown levels. The individual breakdown levels are differently formatted. They are made up of classifying and numbering code elements. The latter consist of data characters occupied by alpha and numeric symbols. The origin of the letters used in it is in German language, namely: Codifiaction from left to right coddification data characters may be omitted.
Special guidelines apply to data characters G, F0 and A3.
Subgroups The classifying coding letters and designations are established on a non-project-specific basis in the KKS keys, namely as: Such modifications are subject to agreement between the parties to the project.
However the following principles apply: However, such schemes may not have the effect of reserving numbers in other applications, not even within the same engineering discipline. Contents of Data Characters I – 3. cldification
Total plant Serial no. The contents of this designation in KKS, is left for coordination for particular power plant. For example we can identify here: Data character F0 contains so called prefix number. It is one digit which identifies one from two or more identical subsystems in the overall plant.
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. Data character G as well as data character F0 can be omitted in KKS if the further part of designation will remain complete univocal. 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.
System code System code consists of three letters and two digits. No one of these symbols can be omitted. Coding letters and designations of the main groups F1 as given in the Function Key: A Grid and distribution systems B Power transmission and auxiliary power supply C Instrumentation and control systems D Instrumentation and control systems E Conventional fuel supply and residues 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, gas cycles M Main machine sets N Process energy supply for external users e.
Numbering starts anew when one of the preceding code elements changes. System numbering must consist of two digits. Redundant zeros must be written e. Generally valid rules on the use of FN numbering are not expedient.
kkx It should be decided on a case- to-case basis which numbering convention is best suited to the extend and structure of the systems and plants to be identified. FN numbering is governed by ocdification following principles: Equipment Unit Code Equipment Unit Code consists of two letters, three digits and sometimes one additional letter data character A3 which can be omitted.
The Equipment Unit identified in breakdown level 2 belongs always to the System designated in breakdown level 1.
KK standard codification
Coding letters and designations of the main groups A1 as given in the Equipment Unit Key: The AN number of breakdown level 2 is used to number the items of equipment classified in A1 and A2.
The AN number must consist of three digits. Redundant zeros must be written. AN numbering may be consecutive or grouping. It is a common practice to apply s grouping: The additional code is used for the numbering of: The additional code can be omitted.
Further applications are subject to agreement between the parties to the project. The additional code is not an alternative code for the components identified under breakdown level 3.
Component Code A component designated in breakdown level 3 is a part of equipment unit identified in breakdown level 2.