Pipe Stress Analysis by CAESAR II & AutoPIPE (Dynamic Loads)

Distinguish steady and unsteady flow, compare static and dynamic analyses, and apply time history analysis and the dynamic load factor to model rapid piping pressure changes like water hammer.

Explore water hammer, a load from sudden valve closure or pump failure, causing pressure surges and cavitation in piping, and preview surge vessels and modeling in Caesar II and AutoPIPE.

Model water hammer in AutoPIPE with a time-history dynamic analysis, configuring mass points, modal analysis, freshwater flow, and a sine-rise transient load to reveal stress increases.

Investigate slug flow and slack flow in multiphase piping, including forces at bends and slug duration and periodicity, with practical application to Caesar II and AutoPIPE.

Model slug flow forces in Caesar II with the static method. Create a 600 mm pipe system with bends, apply node forces, and analyze displacement and stresses.

Model slug flow in AutoPIPE using the static method to analyze slug forces in a 600 mm pipeline, including gravity effects and forces at bends.

Learn how to model slack flow forces in CAESAR II using time history analysis to assess slug flow effects on a 600 mm pipe with 90 and 45 degree bends.

Model slug flow with dynamic analysis in autopipe, set mass points to auto, apply time-history forces to bends, adjust cutoff frequency, and evaluate results.

Explore how pressure relief valves manage cracking and relief pressures, generate jet forces, and how to calculate relief loads using mass flow, exit velocity, and the dynamic load factor.

Model pressure relief forces in Caesar II by applying a concentrated relief force at the outlet, integrating it into load cases, and anchoring behind the valve to ensure safe stresses.

Learn to model pressure relief forces in AutoPIPE, compute thrust from dynamic load factors and pressure difference, and reinforce the system with an anchor behind the valve for safety.

Learn to insert wind and seismic loads into a Caesar II model, using wind shape factors, uniform loads, and code-based seismic calculations with ASMI or NPC codes.

Model wind and seismic loads in AutoPIPE by setting ground elevation, wind exposure, wind cases in global x and y, and static earthquake loads with x, y, z components.

Explore flange failure checks that account for bending moments and gasket-bolts assemblies, applying them to high-risk systems with flammable fluids, large pipes, or high flange ratings.

Perform flange check in Caesar II using equivalent pressure per ANSI code; set max temperature for operation and sustained, then add vertical supports to reduce bending moment.

Use the NC Code method in Caesar II to perform a flange check by entering bolt area, bolt circle diameter, and ASMI hot and cold yield strengths from table y1.

Demonstrates ASME code flange checks in Caesar II, configuring flange type, bolts, and gasket data, then comparing actual versus allowable stresses under loads; covers NDC and equivalent pressure methods.

Model a simple piping system in AutoPIPE, run the analysis, and perform flange failure checks using ANSI and Asmi code methods, detailing flange type, material, gasket, and bolt selections.

Compare piping and underground pipelines, highlighting differences in length, diameter, and fittings, and outline three supports for bends—blocks, line anchors, and restrained systems—per 31.4, with Cesar II modeling.

Learn to model an underground pipeline in Caesar II using soil models, define buried depth and friction, convert sections underground, and analyze stresses.

Model buried pipelines in AutoPIPE by defining soil types and overburden loads, incorporating water table uplift and trench conditions, then run static analysis to assess hoop stress and buckling.

Explore subsea pipeline design, route selection, soil investigations and bathymetric surveys, and model loads like beyond sea and wave loads to prevent buckling and ensure stability.

Identify product transport requirements and applicable codes and standards for subsea pipelines. Calculate internal diameter, define material, and determine wall thickness; assess route and on bottom stability.

Analyze subsea pipeline wall thickness under internal and external hydrostatic pressure, applying hoop-stress checks per D&V F101, API RP 11, and ABS codes for Caesar II modeling.

Model subsea loads in AutoPIPE by applying buoyancy and wave loads to a submerged pipeline, using water depth, water surface elevation, density 1025, and the added mass coefficient.

Prepare a comprehensive pipe stress analysis report for Caesar II and AutoPIPE (dynamic loads), addressing design basis, codes, loads, restraints, deformations, and alternatives for engineers and project managers.

Explore how to craft a piping stress analysis report with AutoPIPE, covering executive summary, methodology, model data, results, and appendices, plus practical modifications like guide supports.

Master dynamic loads affecting piping, such as water hammer, slag force, and pressure relief forces, and model them in Caesar II and AutoPIPE. Develop an understanding of subsea pipeline design.