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Get Accurate Piping Estimates Earlier with Aspen Capital
Cost
Estimator (ACCE)Webinar Q&A
This document summarizes the responses to questions posed before
and during the webinar. Additionalquestions should be directed
toAspenTech Support.
Submitted Before the Webinar:
Q: How do you calculate the required piping for spare equipment?
How do you insert the data for two
identical equipment (one of them is spare) but the piping is not
similar (default) for both?
A:Pumps in ACCE have a volumetric model that covers piping and
instrumentation in a standard
configuration. For a Spare configuration, you would have to
duplicate the pump and select the SPAR
installation option. This would reduce the piping and remove the
flow instrumentation
loop._____________________________________________________________________________________
Q: Is there a piping database creation and correction to local
factors within ACCE?
A:There is not a piping database in ACCE. All costing is derived
from models. Adjustment to local
costing is done by Indexing at the Code of Account level.
_____________________________________________________________________________________
Q: How easy is to input data to ASPEN ICARAS in regards to plant
and piping layout to receive the
piping MTO?
A:ACCE does not have plant layout in the system. The Volumetric
model includes piping that would
normally be sufficient to go to an adjacent piece of equipment
in the same area. That is how we
generate our MTO. Users can override this information as more
accurate line diameters or lengthsbecome available.
_____________________________________________________________________________________
Q: Please discuss how to address the added costs of insulating
pipe, burying pipe, or including
instrumented control valves.
A:Insulation and paint are automatically supplied for piping by
our volumetric model. Insulation uses
built-in or user supplied insulation tables. Any piping line can
be selected to be buried and this is
accomplished using built-in rules and the soil type specified
for the project.
_____________________________________________________________________________________
Q: What are the cost and weight ratios between piping
components? What is the relation of piping
cost to equipment and civil and structural cost and
quantities?
A:ACCE does not use ratios between cost and weight. Ratios are
derived from the engineered
quantities that are developed by ACCE. They vary from project to
project and are location dependent for
many of the quantities based on soil type, seismic requirements,
ambient temperature, etc.
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Q: How do I get more accurate estimates on small piping jobs? My
experience with Aspen Capital
Cost Estimator is that it tends to overestimate.
A:You need to calibrate your experience to our costs and adjust
the indexing to adjust those costs.
_____________________________________________________________________________________
Submitted During the Webinar:
Q: Does Aspen Capital Cost Estimator have the ability to
estimate pharmaceutical grade piping?
A: ACCE has Food Grade piping and sanitary equipment. Much of
this is the same equipment used in
pharmaceutical processes, but with adjusted pricing that is
higher than sanitary. This can be
accomplished by using Indexing either at the Project or Area
level or by using Custom Piping Specs with
pricing adjustments.
______________________________________________________________________________
Q: If I specify 20% Weld X-ray in project level and for a
specific line I specify 50% Weld X-ray, could I
end up getting 80% Weld X-ray (120%x150%) for that line? In
other words, does specification in lower-
level override those in higher-level?
A: The specification at the component level will override the
specification at the area level. Therefore,
you will get 50% X-Ray for the pipe in the example you gave in
your first question, but won't get 80%.
_____________________________________________________________________________________
Q: How do area length, area width, and area height affect the
piping quantities generated by
volumetric model?
A: If you have not specified the pipe envelope dimensions in the
area level specs, then the pipe
envelope is determined based on the area dimensions. This then
impacts pipe lengths as shown in the
presentation.
____________________________________________________________________________________
Q: Is it correct that the wire lengths in each area are
calculated/adjusted in the same way as the
piping shown on slide 33?
A: No, the wire lengths depend on "Distance to MCC" and
"Distance to panel board" specifications in the
Areal level electrical specs.
____________________________________________________________________________________
Q: Is the pipe envelope, from a technical level, the minimum
volume surrounding the apparatus that
cannot be occupied by any other equipment? Does it depend upon
the distance between equipment?
A:Yes, it is the volume around equipment. It depends on many
variables including the type of
equipment, distance between equipment, etc. In Economic
Evaluation, you can set an average envelope
size for the entire area.
____________________________________________________________________________________
Q: What is a more conservative approach, specifying area
dimensions or pipe envelopes?
A:The user should always specify the pipe envelope to have the
most accurate control. Pipe envelops
are not adjusted by scaling rules, while area dimensions are
adjusted.
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Q: Are pipe diameter calculations from the volumetric model
given somewhere in the software
documentation?
A: Chapter 18 of theIcarus Reference Guidecontains the pipe
diameter calculations that are used.
_____________________________________________________________________________________
Q: How does ACCE handle small bore piping quantities?
A: Small bore piping is generated by drains and vents on
equipment and piping and instrument stubouts. Users have control
over some of this configuration. The methods of connections (e.g.
screwed or
welded) are defined on the General or Custom Piping Specs
forms.-
_____________________________________________________________________________________
Q: Do the volumetric models include the costs for piping
supports, and if not, how are costs for
supports calculated?
A:Piping supports are included in the costs of the piping. They
are a generic type with a determined
size and spacing based on pipe diameter.
_____________________________________________________________________________________
Q: Do pipe supports have the same material as the piping?A: Pipe
supports are always assumed to be Carbon Steel.
_____________________________________________________________________________________
Q: Can the system estimate the cost of piggable lines (due to
these requiring special piping)?
A: This is part of the Pipeline components. ACCE has Scraper
Launcher and Receiver for pigging
operations.
_____________________________________________________________________________________
Q: Does it include the price for scaffolding and support
platforms?
A: Scaffolding is handled as an indirect and is entered as a
Percent of Direct Field labor on the
Contractor forms.
_____________________________________________________________________________________
Q: Can the process piping from an AspenTech process simulation
model be imported into the system?
A: If Activated Economics is used in the simulators, then the
flow rates for the process lines are
transferred to APEA/ACCE and can be used to size the process
lines.
_____________________________________________________________________________________
Q: How should I estimate piping passivation?
A: This would have to be included as an adjustment to piping
hours. There is a method to do this using
the Customer Indirects and Proratables mechanism.
_____________________________________________________________________________________
Q: What is the level of estimating accuracy ACCE is targeting
(+/-30% as an example)?
A: Accuracy is a function of scope completion and calibration.
Many users can obtain accuracy for their
estimates of +/- 10%.
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