Chemical Plant Construction Piping Progress BASIC Question
Chemical Plant Construction Piping Progress BASIC Question
(OP)
Dear all experienced experts,
I am a process engineer, but I am on loan to assist the project construction management team for a new chemical plant being constructed.
I have been assigned to monitor contractor installation of piping systems and to project the completion. I am very very new to this side of a chemical plant. I am a process guy meaning give me a plant to operate. So....
Current progress measurement is DIA = Inch Diameter
As we all know a chemical plant has pipes with various dimensions of piping. ISSUE: The contractors chose to tackle the large bore piping systems first to give Inch Diameter Progress, so progress looks great... BUT.... progress will eventually slow due to this method because the smaller bore will consume more time to construct. So...... how does one suggest to measure progress that will allow for a method to project how long it will take for completion?
Thanks in Advance!
I am a process engineer, but I am on loan to assist the project construction management team for a new chemical plant being constructed.
I have been assigned to monitor contractor installation of piping systems and to project the completion. I am very very new to this side of a chemical plant. I am a process guy meaning give me a plant to operate. So....
Current progress measurement is DIA = Inch Diameter
As we all know a chemical plant has pipes with various dimensions of piping. ISSUE: The contractors chose to tackle the large bore piping systems first to give Inch Diameter Progress, so progress looks great... BUT.... progress will eventually slow due to this method because the smaller bore will consume more time to construct. So...... how does one suggest to measure progress that will allow for a method to project how long it will take for completion?
Thanks in Advance!





RE: Chemical Plant Construction Piping Progress BASIC Question
RE: Chemical Plant Construction Piping Progress BASIC Question
So you know roughly how much footage of each size there is.
Then you can look at estimates of how many welds there are for each size.
That way you can track by percentage of completion.
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P.E. Metallurgy, Plymouth Tube
RE: Chemical Plant Construction Piping Progress BASIC Question
In the future you should give this a lot of thought and make it fit the project parameters.
Example:
- Pipeline - Lineal % measurement of installed vs Total
- In Plant Process Unit - Total piping broken down by different categories (% of each of the total) Such as:
(a) Above Ground Large Bore Lineal measurement + Welds + Hydro - % of the total
(b) Above Ground small Bore (Screwed & SW) Lineal measurement + Hydro - % of the total
(c) Underground piping (All sizes) all sizes + Hydro or Service Test - % of the total
Hydrotest - Successful Hydro of systems vs total. Based on a factor split of (a)/(b)/ (c)
If the project is 60% 'Large bore (LB)' facility then Category (a) would be a larger % of the total but 100% of LB installed and tested would still only be 60% of the total.
Adjust the percentages to fit your project based on size, material, and construction factors. Don't assume "what you used on the last project is good enough so let's use use it on this project".
Document your measurement method (with specific examples) in your Installation Contract and stick to it. Make sure it is simple, but effective. Simple for the Contractor to use and report and effective for you (the Engineering Contractor) and the Client to understand, trust and verify.
Sometimes its possible to do all the right things and still get bad results
RE: Chemical Plant Construction Piping Progress BASIC Question
So, get the BOM list, and start independently counting "spools fabricated". Are they demanding to be paid by "inches" or weight of pipe?
RE: Chemical Plant Construction Piping Progress BASIC Question
RE: Chemical Plant Construction Piping Progress BASIC Question
RE: Chemical Plant Construction Piping Progress BASIC Question
To fit and weld a 12" joint would generally be much quicker than fitting and welding 6 x 2" joints or 12 x 1" joints (obviously schedule of pipe comes in to the equation as well)
Cheers,
DD
RE: Chemical Plant Construction Piping Progress BASIC Question
RE: Chemical Plant Construction Piping Progress BASIC Question
what kind of contract do you have? Progess Measurement is easy when you have a times & material contract based on Labor Time Values (John Page or any other system).
But maybe that's beyond your control at this point in time.
Kind Regards,
hahor
RE: Chemical Plant Construction Piping Progress BASIC Question