PASS/START-PROF provides comprehensive pipe stress, flexibility, stability, and fatigue strength analysis with related sizing calculations according to international and national codes and standards. First introduced in 1965, PASS/START-PROF combines a highly efficient solver, powerful analysis features, a user-friendly GUI, an intuitive 3D graphical pre/post-processor, and a detailed help system with embedded intelligence from generations of piping design experts.

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PASS/START-PROF was created to be easy to use by “regular” designers without special knowledge in pipe stress analysis and/or detailed knowledge of standards.

While enabling “regular” designers, PASS/START-PROF is also an excellent tool for professional piping stress engineers. There are no obscure options, settings and questions. Just draw the piping system and run the analysis and smart algorithms will do the rest of the job for you!

PASS/START-PROF has a smart, easy and friendly user interface and user’s manual in English, Chinese, and Russian languages. Even the beginner can perform pipe stress analysis without any special training. PASS/START-PROF enables faster piping modeling than other software.

Process and piping engineers of more than 2,000 companies in many countries already use the software every day for stress analysis and design of different types of pipelines.

PASS/START-PROF offers many functions that make piping model creation very quick including: group editing, quick loop addition, node point renumbering, and spring data application. PASS/START-PROF can import piping models ready for analysis from AVEVA PDMS and E3D, Caesar II, and PCF formats. Data can also be exchanged within the PASS suite and with a large spectrum of general and special purpose CAD and CAE software tools.

PASS/START-PROF is an ideal component for integration into any piping design workflow with interfaces to multiple design and analysis software tools.


Pipelines that can be analyzed include piping for: process and power, gas and oil transportation, district heating piping, hot water supply, and more. Stress, flexibility, stability, and fatigue strength analysis are performed for buried, above ground, vacuum, high pressure, high temperature, and cryogenic piping. Pipelines with various types of restraints, fittings, and expansion joints can be easily evaluated. PASS/START-PROF also offers automatic selection of constant and variable spring supports.

PASS/START-PROF can analyze a wide range of materials used in pipelines including steel, nonferrous materials, plastic pipes and fittings, orthotropic materials such as fiberglass, reinforced plastic, glass reinforced plastics, and glass reinforced epoxy.