Basic Loads and Load Sequences

Temperature, pressure, wind, earthquake and more

Loads

100 cases of temperature and pressure.
30 static seismic acceleration and 10 wind cases.
Multiple dynamic analysis in a single run.
Up to 50 Response Spectrum, 10 Harmonic loads, 10 Seismic Anchor Movements, etc.
Report loads in excel including support coordinates.
Up to 140 User Loads, which can be used for imposed displacements, distributed loads, imposed forces, cold-springg, etc.

Main Features

As each load is applied in a unique way in a sequence defined by the program or by the user, the program has all the deformations caused by the loads and can calculate the stresses that each one of them causes and combine them according to the requirements of each standard without user intervention.

Most advanced calculation engine on the market, with very high convergence.
Calculus by Load Sequences, developed by professors at the University of Berkeley.
The user can adjust the load sequence according to the process.
Each Analysis set can have a different load sequence.
Density can be changed in each Analysis set.

Load Sequences

As a general rule, in the Oil industry the start-up sequence is first pressurize the line and then go to the operating temperature. In AutoPIPE the sequence is:

Weight Pressure Temperature

In LNG plants and other chemical plants as the Olefins units the pipe has to be cold down slowly up to a cryogenic temperature and then is pressurized. In AutoPIPE the sequence is:

Weight Temperature Pressure

This methodology is the one recommended by ASME and ensure the proper calculation of the stress. In the first sequence the gaps are closed due to the pressure extension of the pipe, but in the second sequence are closed due to the temperature. Many programs can only deal with the second one.

Apply one load after the other to gain in accuracy