Piping Design and Engineering Services
Little P.Eng. for Engineering Services offers a complete package of piping design and engineering services:
Producing the piping drawings based on field data.
Design of the piping systems and mechanical components.
Performing the pipe stress analysis.
Producing the calculation’s drawings, to report the loads acting on the pipe supports.
Performing the structural and seismic analysis on pipe supports, anchors and guides design, performing finite element analysis, and hanger selection.
Pips Stress Analysis
Little P.Eng. for Engineering Services performs Pipe Stress Analysis based on ASME codes (American Boiler and Pressure vessel). ASME codes cover the design, analysis, manufacturing and inspection of pressure vessels, piping and supporting structures. It represents a complete set of rules for the analysis of the mechanical components too.
We perform pipe stress analysis for the various load conditions such as:
We follow ASME B31 codes in piping design and engineering for power and process plants and industrial and commercial facilities under very different loading conditions like as weight, thermal, seismic and other dynamic loads. Little P.Eng. for Engineering Services uses ASME section III codes and NRC regulations in piping design of power plants.
We perform static analysis for the following loading conditions:
Operating pressure or upset condition pressures.
This loading condition consists of the weight of pipe, medium, insulation and any attachment to the pipelines.
This loading condition is a dynamic condition but normally analysed as equivalent static condition.
This loading condition is induced by different thermal transients.
This loading condition occurs in the connecting pipes in a horizontal plane between two reservoirs with fluid at different temperatures with small flow rates. This initiates an extra bending stress and creates local stresses in the pipe cross section due to a nonlinear circumferential metal temperature distribution. Pressurizers’ surge lines are one of the places where thermal stratification occurs.
This loading condition causes the movement of pipes due to thermal movement of the equipment or pressure vessels and the movement of the pipe supports due to seismic loads.
Dynamic analysis are performed for the following occasional loading conditions:
Water Hammer/Steam Hammer Loads (Transient slug analysis) :
This loading condition occurs as a result of events that trigger hydraulic transients (like as operational changes). These events may be due to valve opening/closure, pump start-up or a pump trip. Such events result in pressure waves which travel through the piping systems in a complicated manner including reflected waves, etc.
Induced by pipe breaks in pressure vessels, pumps, and valves.
Seismic (Earthquake) and Other Building Induced Loads:
This is constituted by the dynamic pipe support movements, during a seismic event, and the response to these movements depends on the dynamic characteristics of the considered piping systems and their attachments in relation to the characteristics of the loading.
We perform Finite Element Analysis for the following occasional loading conditions (earthquake, water hammer, etc.).
Transient dynamic analysis yields the response of the piping system, if the dynamic excitations are known in terms of time histories of support movements.
Response spectrum analysis is used in the assessment of structural integrity, if the loads are given in terms of the floor response spectrum. If not, we can even provide the floor response spectrum too, based on the ground motion at the site location.
Equivalent static analysis can be used when just the ground movements are available, based on ASCE 7-10.
Structural Analysis of Pipe Support
Little P.Eng. for Engineering Services performs the Pipe Support Stress Analysis based on ASME and AISC codes (American Institute of Steel Construction). We perform the structural analyses based on ASME section VIII for the supporting structures of the piping systems evaluated by ASME B31 codes (power and process pipelines). We use ASME section III for the analysis of pipe supports of the nuclear piping systems.
Little P.Eng. for Engineering Services engineers create 3D models of the pipe supports and perform the finite element analysis on them. So you can see an analysed 3D models of the pipe supports in the stress report.
Structural Analysis of Pipelines Mechanical Components
Little P.Eng. for Engineering Services performs more refined Finite Element Analysis on the piping components such as valves, flanges, nozzles, weld lugs, embedded welding plates and wall penetrations, etc. Our analyses are based on ASME Section VIII, Division II, and WRC Bulletins 107, 297 and 368. ASME section III is used for the structural analysis of the piping equipment of the nuclear piping systems.
Beside data provided in ASME codes and WRC's Bulletins, Little P.Eng. for Engineering Services performs advanced finite element analysis to estimate the SIFs (Stress Intensification Factors) for different piping components like as tees, bends, etc.