Felipe Buratto’s Post

Simplified Methods Simplified methods for piping flexibility analysis serve as practical tools in the hands of experienced engineers, allowing them to postpone the need for comprehensive, detailed methods. These approximations can provide valuable insights during early-stage design assessments. When properly applied, simplified methods can ensure safety and reliability in the design process while expediting initial evaluations. The first classification of simplified methods includes special configurations of two, three, or four-member systems. These systems typically involve two terminal points with complete fixity and square corners, simplifying the calculations. The second group of methods is restricted to square-corner systems situated in a single plane. Such systems also feature two fixed ends and allow for a variable number of members, making them versatile within their specific limitations. Moving into more complex configurations, the third group expands the applicability of simplified methods to space configurations. Although still restricted to square corners, these methods account for more complex three-dimensional geometries while maintaining two fixed ends. Lastly, extensions of the previous methods allow for the inclusion of curved pipes. While indirect, these methods provide a way to incorporate the special properties of curved piping systems. Simplified approaches are not meant to replace detailed analyses but instead offer a preliminary framework to guide further investigation. By narrowing down potential issues early on, engineers can focus their comprehensive methods on specific areas that require closer scrutiny. Please note that the attachment includes Sample Calculation 4.1 along with Chart C-4. Design of Piping Systems M.W. Kellogg Martino Publishing 2009 #flexibility #piping #geometries

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An insightful look into piping systems, detailing key aspects of design, materials, and performance essential for industrial applications. #PipingEngineering #MechanicalEngineering #PlantDesign

it's amazing how everything fits together on a larger scale when doing piping designs. imagine this flange as part of other pipes to create a pipe layout design. man I love engineering #designwork #piping #engineering #mechanicalengineering #pipingengineering

Piping Design Loads: Understanding Key Considerations Piping systems are designed to withstand a range of loads to ensure safety, reliability, and compliance with applicable codes, such as the ASME B31 series. These loads can be categorized as sustained, occasional, and others, depending on their origin and frequency of occurrence. Proper consideration of these loads is critical during both the overall system design and detailed component analysis, whether the system operates under hot or cold conditions. Sustained Loads Sustained loads are caused by continuous mechanical conditions such as the weight of the piping system, the fluid it carries, and any attached components like valves or insulation. Internal pressure also contributes to sustained loading, generating stress within the pipe walls. These loads must be carefully managed to prevent sagging, over-stressing, or permanent deformation over time. The ASME B31 codes prescribe limits for these stresses, ensuring long-term performance and structural integrity. Occasional Loads Occasional loads are infrequent but significant forces that a piping system may encounter. These include wind, rain, and snow, which are environmental factors, as well as relief valve discharges and other operational phenomena. For instance, when a relief valve activates, the sudden release of pressure can generate powerful forces on the piping. Although these loads occur rarely, they must be considered to avoid damage during extreme conditions. Structural supports, guides, and anchors play a critical role in managing occasional loads. Hot and Cold Systems Designing for thermal conditions is another crucial aspect. Hot systems expand due to thermal growth, creating stresses that must be absorbed by flexibility in the design, such as expansion loops or bellows. Conversely, cold systems may contract, leading to potential issues like brittle fracture or overstress in restraints. Seismic Loads are real but not considered herein this writing. #load #piping #stress #occasional #thermal #sustained #structural #reliefvalve #environmental #wind #rain #snow #internal #pressure

"Thrilled to announce the successful completion of the Piping Engineering course at Don Bosco Institute of Technology, guided by the esteemed Prof Mahesh Rajwade. I've gained a comprehensive understanding of Piping Layout basics, including Pipe Thickness, Spool Length, and Dyke Wall calculations. Proficiency in Isometric Drawing, Plot Plan, and Pipe Rack design has been attained. Moreover, I possess in-depth knowledge of Valves, Joints, and Reducers, alongside a solid grasp of fundamental concepts like Hook's Law, Iron Carbon Diagram, and Stress-Strain Curve. Excited to leverage these skills in practical applications! #PipingEngineering #ContinuousLearning"

Determining the minimum wall thickness for a given pipe diameter and selecting the appropriate actual thickness are fundamental design considerations in any project. A piping materials engineer must calculate the required piping thickness according to ASME B31.3 (or other applicable construction codes) to withstand internal line pressure. A key equation for calculating pipe thickness is (t<D/6) , which applies to thin-walled pipes. There are two methods for calculating pipe wall thickness: 1.The first method is based on the exact design conditions specified by the process department in the line list, which considers the design pressure and temperature of the line 2.The second method Flange Rated Method: The flange rated method, also known as the full rating method, calculates the thickness based on the temperature-pressure combinations, providing the maximum thickness for a specific rating and material. This approach is primarily used for piping classes rated less than 900 and with diameters less than 24 inches. It is considered the most conservative approach, often resulting in thicker pipe walls than necessary. This method helps to standardize piping class specifications across various temperature-pressure conditions for the same rating and material.

Fabrication

Internal Pressure Design for Straight Pipe The equations provided in ASME B31.3 for pressure design of straight pipe are essential for ensuring the structural integrity and safety of piping systems. One such equation, commonly known as the Boardman equation, is expressed as t = PD/2 x (SEW + PY), where: - t represents the pressure design thickness, - P is the internal design gauge pressure, - D denotes the pipe outside diameter, - S is the allowable stress value, - E stands for the quality factor, - W represents the weld joint strength reduction factor, - Y is a coefficient provided in Table 304.1.1 of the Code. This equation is derived empirically and provides a simplified approach to determine the minimum required thickness of the pipe, accounting for various factors such as pressure, material properties, and weld joint strength. It's important to note that the Barlow equation, t = PD/2SE, is also commonly used for pressure design calculations. However, this equation is based solely on the outside diameter of the pipe and is considered conservative compared to the Boardman equation. The Barlow equation has been removed from the ASME B31.3 Code to streamline and simplify the design process, as it tends to yield thicker pipe walls than necessary for safety. While the Boardman equation is an empirical approximation of the more complex Lame equation, it remains widely accepted and utilized in engineering practice due to its practicality and effectiveness in designing piping systems to withstand internal pressure loads. By incorporating factors such as weld joint strength and material properties, the Boardman equation provides a reliable method for determining the minimum required thickness of straight pipes in various industrial applications.   “Process Piping – The Complete Guide to ASME B31.3 “ Charles Becht IV, 2004, ASME Press #boardman #barlow #b31 #internal #lame #pressure #coefficient #standards #pipe