SIGMA Ingenieurgesellschaft mbH

As a specialist in the field of pipe stress analysis and plant construction SIGMA Ingenieurgesellschaft offers a wide range of engineering services as well as software development, system integration, sales and maintenance services.

SIGMA Ingenieurgesellschaft mbH was founded 1989. After sixteen years in Dortmund-City our growing business requires more room. We moved to our new company office in Unna/Germany in November 2005.


The combination of modern working methods, up-to-date CAE-Software and the Know-How of more than 40 years in the pipe and plant business guarantees a reliable engineering and project consulting in

  • Static and dynamic analysis of various projects as power plants, district heat networks, chemical plants, pump stations, refineries, ships, bridges, cranes, and other units in plant construction
  • Calculation of flow distribution, pressure drop and temperature drop in piping networks,
  • Finite element analysis

Our team of engineers at the headquarter in Unna guarantees qualified and on timely processing of your orders.

For details please refer to our Engineering site

Contact our Engineering Team

by phone +49 (0)2303 332 33-0

by fax +49 (0)2303 332 33-51 (Fax Engineering department)
by email
or by standard mail:

SIGMA Ingenieurgesellschaft mbH
Bertha-von-Suttner-Allee 19
D-59423 Unna

Software development, consulting, training

Qualified engineers and program developers in the support team which gurantees a quick solution for each problem for the deployment of SIGMA software with highest efficiency. Part of our concept is the product- and project-oriented training of the program users.

The result of a continuous knowledge transfer between program developers and project engineers is a software product, developed according to the requirements of the customer.

We are building software from engineers to engineers.

Our qualified software engineers develop the programs

  • ROHR2, ROHR2stoss, ROHR2fesu,ROHR2iso
  • CAD/CAE -Interfaces and
  • additional software according to the customers needs

For details please refer to ROHR2 and SINETZ product pages

A continuous training of our staff guarantees service on the highest level.

Software sales

Sales and support worldwide by SIGMA directly or by one of the ROHR2 Sales Partners in Europe
Brazil/South America, China, India, South Africa, South Korea, Vietnam, South East Asia (Singapore, Malaysia, Indonesia, Thailand), USA. Meet our sales partners on

How to contact our Sales team:

by phone +49 (0)2303 332 33-0
by fax +49 (0)2303 332 33-50

using the contact form

by e-mail

or by standard mail:

SIGMA Ingenieurgesellschaft mbH
Bertha-von-Suttner-Allee 19
D-59423 Unna

Email Stammzertifikat / Email root certificate

Das Stammzertifikat enthält die notwendigen Informationen zur Ver- und Entschlüsselung von E-Mails.

Download des SIGMA Email Stammzertifikats

The root certificate contains the public key for crypted email messages.

Download the SIGMA email root certificate here