Chemical Plant Construction Time Estimation
Chemical Plant Construction Time Estimation
(OP)
I am a political science faculty member currently working on a public policy project that requires that I calculate the least amount of time required for the construction of a new chemical facility. I have found quite a lot of information on cost estimation, but need to know where I can look for reliable estimates of the quickest construction could be completed (assuming cost is not an important variable). Does anyone know of a book, textbook, journal, trade publication, article, etc. where I could find this information? Thank you in advance.





RE: Chemical Plant Construction Time Estimation
These may include but not limited to the following:
1. Job location - Houston Gulf Coast, Siberia, or central Saudi Arabia?
2. Plant Construction method - Stick build in place, Prefabricated Modules, other
3. Type of plant - Feed, End Products, Process, Operating Pressures, Operating Temperatures,
4. Availability of skilled construction labor
5 Logistics - Delivery of Plant Machinery & Equipment, Bulk Materials (Pipe, Valves, Fittings, Electrical Conduit, etc.) Construction equipment and construction consumables
6 Soil conditions - Swamp, Frozen, Solid Rock, Etc.
7. Local Politics
8. Local Permits and Codes
9. Technology - Known process or New unproven State-of-the-Art Technology
These are just a few of by least favorite things.
RE: Chemical Plant Construction Time Estimation
RE: Chemical Plant Construction Time Estimation
You could get the Timmerhaus book and back out time frame from labor hours based on your fictional design. What is your end goal?
RE: Chemical Plant Construction Time Estimation
mfetzien - you mentioned estimates for "trim". I have seen this term used often as estimating pipe "trim", vessel "trim", etc.
What exactly is trim? I have asked this question many times and never really got a good answer.
Thanks in advance,
JoeChem
RE: Chemical Plant Construction Time Estimation
Trim is widely considered the auxiliaries surrounding the vessel or column. So, level gauges, standpipes, bridles, staircases. But, depending how the cost of the trim is calculated might include man ways, nozzles, PSVs.
It's not a clearly defined term, but usually means low price items that are needed for the vessel to function versus the high expense elements such as the internals: weirs, downcomers, vortex breakers, distributors, stand pipes, 2:1 hemispherical head ends.
I believe if you look in a good book on piping you will likely find a more definitive answer.