Smart Simulation & Sizing Tools for Every Piping and Equipment Engineer/Designer


  Quick Pipe Stress Analysis and Optimal Sizing


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.

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.

PASS/START-PROF® – Renowned, one of the first world commercial piping stress analysis software.

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!

Enabling new users to perform piping/equipment analysis in days rather than months.

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 is successfully used in many industries:

  • Power and District Heating
  • Oil and Gas
  • Process
  • Chemistry
  • Metallurgy
  • Other Industries

Reduces Analysis Time, Effort, and Cost

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.

Features and Advantages

Broad Applicability

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/STARTPROF 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.

The following piping types are covered:


PASS/START-PROF include following databases:

User Interface

PASS/START-PROF has a smart, easy and friendly user interface with user manuals in English, Chinese, and Russian languages. Fast piping modeling allows even the beginner without any special training to be able to perform pipe stress analysis.

An intuitive object-oriented piping model is used for easy modeling of piping systems that consists of following objects:

System Requirements

Windows 7/8/10+
IA-32 or AMD64 / EM64T architecture processor
1GB of RAM
Video card with OpenGL 2.0+ support and 1GB+ of RAM
Display resolution at least 1024x768, recommended 1280x1024


The following codes are implemented into Start-Prof software:


Start-Prof has interfaces with following design and analysis software:

Software Import into Start-Prof Export from Start-Prof

START-Elements - Express Analysis and Sizing

Along with the analysis of piping systems of any complexity, PASS/START-PROF performs a wide spectrum of calculations “on the fly” thereby helping piping designers to make the right decisions. PASS/START-PROF calculates pipe and fitting wall thicknesses, span lengths, as well as sizes of typical piping assemblies. It also checks flange leakage, pump and equipment loads, buried and above ground pipeline longitudinal stability, pipe wall stability under vacuum, and other loads.

Besides the analysis of arbitrary configuration pipelines, we have implemented a working tool along with a piping handbook for piping designer — a START-Elements option. PASS/START-PROF software is designed for rapid flexibility estimation of piping fittings, their strength and stability analysis.

START-Elements allows the user to do the following:
  • Analyze stress of L, Z and U-shaped piping loops (buried and above-ground)
  • Pipe and fitting wall thickness calculation or maximum pressure allowed according to the code selected
  • Calculate maximum allowable distances between supports via strength and stiffness analysis
  • Check general and local stability of straight and curved pipe elements under the thermal expansion, external pressure (vacuum) and soil pressure loads
  • Calculate minimum pipeline laying depth for underground pipeline stability analysis
  • Calculate maximum pipeline laying depth for buried pipeline by polyurethane insulation stress analysis
  • Calculate allowable load on saddle support for large-diameter pipes
  • Calculate allowable distances between single action (one time) compensators and their closing temperature
  • Calculate bellows stiffness if the manufacturer’s data are absent
  • Flange leak check
  • Centrifugal pump load check per API 610 (ISO 13709), GOST 32601-2013 and Kellogg method (L.C. Peng Pipe stress engineering)


PASS/START-PROF can be delivered in different configurations to evaluate the piping stresses, displacements, and support loads from thermal expansion, cold-spring, soil and support subsidence, and other loads according to applicable standards and codes.


Simulation and sizing for any piping network considering all applicable national codes.

Global Standards
configuration includes only worldwide popular standarts.


Simulation and sizing for piping networks based on applicable national codes for process plants as well as for gas and oil transportation systems.

Global Standards
configuration includes only worldwide popular standarts.


Piping stress analysis of high density polyethylene and/or fiberglass reinforced plastic piping systems.

Configurations Comparison

CodeComplete Process Power Complete Global Standards (40% discount) Process Global Standards (40% discount) Power Global Standards (40% discount) HDPE+FRP (40% discount)
ISO 14692
HDPE Piping
ASME B31.1
ASME B31.3
ASME B31.4
ASME B31.5
ASME B31.8
ASME B31.9
EN 13480
GB 50316
GB/T 20801
GB 50251
GB 50253
DL/T 5366
CJJ/T 81
RD 10-249-98
GOST R 55596
GOST 32388
SNiP 2.05.06-85
SP 36.13330