RohrTech
Engineering with new Perspective
Services
Engineering with new Perspective
RohrTech provides services from concept to Consultancy & Detail Engineering of fossil fuel fired power plants of unit ratings upto 800 MW. These projects are executed either on an Engineering, Procurement & Construction (EPC) basis or on a Non-EPC basis. In the case of EPC route, the complete project is executed by one or two main contractors. In the other case, project execution is done based on a large number of systems / packages being procured from different vendors / contractors. This requires preparation of well defined specifications and a great amount of coordination between many vendors and contractors to ensure smooth execution of the project within the targeted schedule and budgeted cost.
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We Mainly Deals in:
Detail Engineering
Piping is a major expenditure in the design and construction of industrial, refinery, petrochemical, or power-generating plants when one considers engineering costs, material costs, and fabrication and field labor costs. Proper planning and execution of the design and routing of pipe can have a major impact on controlling the total installed cost (TIC).
Piping Layout / Isometric Drawing
Piping Layout Considerations and Planning Studies for Improved Piping Economics
Proper planning is an important activity performed by the piping designer in the early stages of a project. Space conservation and a symmetric piping arrangement are achieved when all the systems are evaluated in the preliminary stages of design. This study will become the final design. It is important to consider the cost of the piping material at this time for the expensive lines. These lines should be kept as short as possible, while maintaining proper piping flexibility even if this requires changing the equipment arrangement.
Detailed design should not start until the planning studies are complete. Ex-pending engineering work hours on details that are subject to change pending the completion of the planning study is not recommended.
Piping layout then becomes a matter of designing dimensioned routing from one point to another point with the branches, valves, piping specialties, and instrumentation as indicated on the P&ID. This statement, however, is an over simplification of the process, since many other factors must be considered, such as interference,piping flexibility, material costs, pipe supports, operation and maintenance, and safety and construction requirements.
Piping Stress Analysis
Piping Flexibility
The effects of the thermal expansion of pipe and fittings as a result of system operating temperature changes cannot be overlooked during the layout and routing of any piping system. The function of piping flexibility or stress analysis has, for the most part, been delegated to the computer particularly in the case of high-temperature, high-pressure piping systems. The piping stress analyst translates and enters the piping design data into the computer, reviews the output data, and if the system is too rigid, may suggest appropriate corrective redesigns. However, it is the piping designer’s responsibility to ensure that the final stress analysis results are incorporated into the final pipe support and pipe routing design.
In the past, a computer stress analysis, including the development of input data and the interpretation of the output, could be expensive and time-consuming if numerous iterations of computer runs were needed to arrive at an acceptable system design.
Piping Support Drawings
Support Drawings to composite piping drawings and plastic models for interference detection is the use of computer-aided design (CAD). Specifically, three-dimensional (3D) computer modeling can provide an efficient, accurate, and cost-effective alternative to the traditional manual methods for interference detection. This and other CAD applications for piping layout are addressed in the section ‘‘Application of Computer-Aided Design to Piping Layout.