NIAM Credentials for standards includes basic design and other important gas and combined-cycle power plants, including P&ID (piping and instrumentation diagram), system and major equipment datasheet description, control system configuration and process and component control in power plant, single-line diagram (SLD) of whole components of the power plant, main equipment layout map and cable and pipeline routes, base design (and sometimes detailed) plan of power plant major buildings, signal list, electrical bar lists, general maps and credentials such as proposed technical standard, base design credentials, technical specification of coatings for pipeline, connections, ground systems coating, etc.
Credentials are used by MAPNA staff as a reference for technical proposals made by employer, and are open to MAPNA engineering sections in early phases of the project; this provides engineering section a base for working out the credentials of the project through limited changes made into the reference.
NIAM has made an attempt to attract wide spectra of different tastes and preferences of the employers; however, in projects where NIAM’s options fails to meet special needs of the projects, our engineers will incorporates the project special needs and conditions into specific design. To elaborate more on standardization, take an example. If we assume the scope of a combined-cycle power plant are concentric circles, the most central circle, where MAPNA is directly involved in design and procurement of equipment and facilities and would pre-plan the so-called power block, is gas and steam turbine and generator. An attempt also has been made to typecast equipment, arrangement, placing, electrical and mechanical connections, and related buildings to avoid unnecessary displacements in every single project. The second concentric circle consists of recycling boiler, transformers, electrical and control facilities of the industrial buildings.
The third concentric circle consists of component systems of the facilities in second circle including major and auxiliary cooling systems, water supply system for firefighters, water purification plant, auxiliary steam, compressed air, firefighting, fuelling, repair centre, and emergency power systems. The last and fourth circle consists of buildings and indoor spaces, and public and non-industrial venues, etc.
Design and manufacturing of the equipment and facilities in the central circles, where there is limited room for later changes and diversity, has been typical and fixed-standard; however, in outer circles, facilities and buildings take into consideration the tastes and preferences of customers and special needs of the project and the regional climatic conditions to provide more diverse options in design through pre-designed structures. This consideration makes structures re-usable many times in later projects. Different voltage and electrical pole arrangements and main cooling system of steam section, which significantly affects the power block design, are designed in a way so as to meet different needs and modules of the project.