System input and load cases

The graphical user interface ROHR2win is the pre- and postprocessor of ROHR2. All inputs can be generated by using ROHR2win.
A wide range of control functions enables the user to check the input data easily. In addition all results may be displayed and checked both graphically and/or numerically in tables, detailed customized printed reports may be generated.

ROHR2win creates input data for the calculation kernel.

  • All data required for the analysis are put in by the user by mouse or dialog windows.
  • ROHR2win offers the full interactive access to data via graphics.
  • All inputs are shown graphically
  • All control records, the line topology and superpositions of load cases are created automatically by the program

During the process the user is supported by comprehensive integrated databases.


Databases containing data of pipes, bends, flanges or expansion joints according to technical standards or according to manufacturer’s data.
Databases are extendable by the user.

The ROHR2 standard version includes:

Component databases in ROHR2
  • Pipes: ASME B36.10, EN 10220, DIN 2448, DIN 2458
  • Bends: EN 10253-2, ASME B16.9, DIN 2605 part 1, DIN 2605 part 2
  • Flanges: EN 1092-1, ASME B16.5, DIN 2627 - DIN 2638
  • Blind flanges: EN 1092-1
  • Reducers: EN 10253-2, DIN 2616 part 1, DIN 2616 part 2, ASME B 16.9
  • Tees: EN 10253-2, DIN 2615 part 1, DIN 2615 part 2, ASME B 16.9
  • Expansion joints: HYDRA (Witzenmann), BOA (IWK), KOMPAFLEX, FLEXOMAT, HaTecFlex, HKS and Dilatoflex
  • Heads: EN 10253-2, DIN 28011, DIN 28013, DIN 2617
  • Visco dampers: GERB, type VES, RHY and VISCODA type VD, VM
  • Spring hangers /supports: ANVIL INTERNATIONAL GB-China, Grinnel, Hesterberg, LISEGA, Petrochemical-CN, PipeSupportsGroup, Pipingtech,
    PSS, Seongwha, SSG, Witzenmann (HYDRA)
  • Constant hangers /supports: LISEGA
  • Stiffness of supports acc. toVDI 3842/2004
  • Steel structures: following standards, Definition of dimensions
  • Databases for rigid supports, couplings (jacket pipes) and instruments created by the user.
Material databases in ROHR2
  • Material database containing material according to EN / ASME / DIN etc.
  • Direct access to ASME Stress table data from ASME BPV Sec. II
  • Temperature and wall thickness depending values for Young´s modulus, coefficient of expansion, tensile strength, yield strength and code depending allowable stresses
  • The material database may be extended by the user
  • Material database allows the administration of various norms and revisions
  • Control the form of manufacturing
  • Consideration of creep range parameters
  • Automatic determination of allowable stresses depending on the life cycle
  • Automatic determination of reduction factors at cryogenic temperature according to AD 2000 W10 or ASME B31.3
  • For EN13480, ASME B31.1 and ASME B31.3 a reduction factor for allowable stresses at welds can be considered (e.g. “Weld Joint Strength Reduction Factor“ according to ASME B31.3)
  • GRP materials with anisotropic properties may be defined.
  • Youngs modulus and creep modulus can be defined at plastic pipes to consider long time and short time values
Load cases and loads

Load cases and loads

  • Definition of load cases in dialog boxes.
  • Alternative: Simplified user interface with load case and loads standard settings
  • Load case superpositions for stress analysis and extreme value calculation are created automatically depending on the selected stress code.
  • Load case superpositions of extreme value combinations are created automatically and may be modified by the user).
  • Automatic generation of wind loads according to DIN 1055 part 4, DIN 4133, EN1991, NV65, UBC, ASCE 7, IS875 or by user defined wind pressure tables.
  • Automatic generation of snow loads and ice loads according to DIN 1055,  EN 1991
  • Ice thickness is considered at wind loads
  • Automatic generation of seismic loads acc. to EN 1998, UBC and ASCE
  • Automatic generation of fluid hammer loads (Joukowsky)