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 The
pcTUBE™ computer program is now available from CC Technologies
Systems, Inc. This computer program provides state-of-the-art
methodology for assessing the creep-rupture life, creep-crack-growth
life, and fracture potential of cylindrical pressure vessels
and pipes. CC Technologies Systems, Inc. is licensing pcTUBE™
for individual use on MS-DOSTM and MacintoshTM personal computers
equipped with math co-processors.
Developed for
MTI
The pcTUBE™ computer program was developed for the
Materials Technology Institute of the Chemical Process Industries,
Inc. (MIT) by Dr. F.A. Simonen of Batelle and Dr. C.E. Jaske
of the CC Technologies Systems, Inc. It is a user-friendly,
interactive version of computer programTUBE that was originally
developed at Battelle during the Materials for Steam Reformer
Furnances Group Research program. The pcTUBE™ software
is designed for use on personal computers.
Model Furnace
Operations
pcTUBE™ can model the behavior of furnace tubes during
typical operations, including startups, shutdowns, and operational
trips. The operating history is stimulated by a series of
load steps. Up to 100 load steps can be modeled. The series
of unique load steps is defined as a block of loading history.
A block of stimulated operation is repeated a specific number
of times or until creep-rupture failure of the tube is perdicted.
pcTUBE™ computer the stress and strain distribution,
as well as creep damage fraction, across the tube wall as
a function of operating life. The Larson-Miller parameter
is used to model creep-rupture behavior, and the Robinson
time-fraction rule is used to compute creep damage. Key Features
of pcTUBE™ The pcTUBE™ program has an interactive
preprocessor to facilitate data entry. The input data are
saved in a file for later editing and re-use. Materil properties
and creep models are available for three alloys: HK-40, HP-50,
and Nb-modified HP. The pcTUBE™ software comes with an
extensive user manual that describes the theoretical basis
of the analytical method and provides instructions and sample
problems. It also has a compact output file format to minimize
the amount of information produced by largescale calculations,
code to ensure numberical accuracy on personal computers,
and periodic screen displays to inform the user of the status
of calculations. The pcTUBE™ program has been used to
assess the life and design of catalyst tubes used in ammonia,
methanol, and hydrogen reformer furnaces.
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