Pipe Stress Analysis For Gas Treatment Unit

Pipe Stress Analysis For Gas Treatment Unit of Gas Compressor Station

Delivered comprehensive pipe stress analysis for gas treatment unit, enabling piping flexibility validation, equipment nozzle load compliance, support optimization, and safe, standards-compliant plant operation.

Client

A Europe-based leading EPC contractor

Location

Middle East (Iraq)

Project Duration

52 Weeks

Software Tools

Engineering Requirement

The client required comprehensive piping stress analysis for the Gas Treatment Unit (GTU) piping systems as part of a Gas Compression Station (70 MMSCFD), Gas Treatment Plant (200 MMSCFD), and 70 km pipeline project.

The objective was to validate piping flexibility, structural integrity, equipment nozzle loads, and code compliance under sustained, thermal, wind, seismic, surge, slug flow, and pressure relief loading conditions, while ensuring safe, reliable, and standards-compliant plant operation.

The gas treatment unit pipe stress analysis scope involved the analysis of 355 stress-critical piping lines, requiring detailed engineering data review, 3D piping stress modeling, comprehensive load case analysis, equipment nozzle load evaluation, flexibility verification, stress reporting, engineering documentation, and pipe support optimization.

Leveraging its piping stress analysis services, Rishabh Pro Engineering established a structured engineering workflow covering input data review, CAESAR II stress model development, multi-condition load analysis, equipment qualification, support optimization, code compliance verification, and engineering documentation. The team incorporated regular client reviews and vendor coordination to ensure alignment with project specifications and applicable engineering standards.

Project Deliverables

Piping Stress Analysis Report

CAESAR II Analysis Models (.C2 Files)

Stress Isometric Drawings with Node Numbers

Pipe Support Load Reports

Equipment Nozzle Load Summary

Pipe Support Optimization Recommendations

Engineering Calculations & Design Documentation

Piping stress analysis for complex gas processing facilities requires careful evaluation of multiple operating and occasional load conditions while maintaining equipment and piping integrity. Rishabh Pro Engineering, as a part of gas treatment unit piping stress analysis scope, followed a systematic approach using Octave Aspect Pipe Stress (formerly CAESAR II) to develop comprehensive 3D stress models representing piping geometry, supports, equipment connections, and boundary conditions. The engineering team evaluated sustained, thermal expansion, hydrotest, wind, seismic, PSV discharge, slug flow, surge, and displacement load cases, while assessing compliance against ASME B31.3, ASME B31.1, API, NEMA, and WRC requirements.

The team also optimized pipe routing and support configurations to address equipment nozzle load limitations and improve system flexibility. A specific support modification involved revising the piping geometry near an equipment connection and adding hold-down support along with guide and rest supports to improve piping stability, control vertical movement, and meet flexibility requirements.

The final engineering package included stress reports, marked stress isometrics, support load data, nozzle load summaries, native CAESAR II models, and supporting engineering documentation for detailed engineering, construction, and future plant maintenance.