surface area of pipe fittings 3

[Murali-1311]

I need to finalize the paint area for my unit rate contract of pipe spool fabrication, so can can somebody can help me with a reference table for the surface area of Butt weld pipe fittings such as elbows, tee, reducers, flange,

 

[1503-44]

+10%

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I take no responsibility for any damages or injuries of any kind that may result.

 

[Murali-1311]

Did you mean +10% of theoretical surface area? can you help with a reference chart with surface area of all fittings?

 

[1503-44]

No. Just add 10% to your length of straight pipe.
We don't even count individual tees and elbows until they get ordered off of an MTO for construction. I think just to account for paint, a simple % adder should suit your purpose. You could vary the percentage if you have more fittings. Anyway, my preference would be to handle such things with a simple percent adder of one kind or another. Maybe you think differently.

Fitting surface area is just that of a cylinder, length x circumference more or less. Just decide how long they are and make a spreadsheet to do the math and add them all up.

Statements above are the result of works performed solely by my AI providers.
I take no responsibility for any damages or injuries of any kind that may result.

 

[Murali-1311]

the 10% consideration shall be good for lumpsum pricing but here I need to submit surface area details for an unit rate contract of pipe spool painting. Since all these Butt weld pipe fittings are covered under ASME B16.9, I believe there must be standard values.

 

[LittleInch]

Other than someone painting it no one else cares about surface area AFAIK.

I'm sure someone created a spreadsheet somewhere but I've never seen a table of it.

An elbow will be the same as the chord length of straight pipe at the bend radius mid axis. That length is in B16.5 I think.

A tee is probably 10% more than straight pipe

A flange I guess 30% more than the normal pipe, maybe 40%?

Just make some estimates and go with it. Most of the areas should be straight pipe no? So it won't kill you if you're a little bit out.

I understand you're only responding to an ITT, but someone is going way too complex here. Must have been a QS who put it together....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[katmar]

There is a web page called google.com that is quite useful for this type of question.

https://kupdf.net/download/pipe-fittings-surface-area_5cd13b1ce2b6f5c3528b6ddd_pdf

Katmar Software - AioFlo Pipe Hydraulics

http://katmarsoftware.com

"An undefined problem has an infinite number of solutions"

 

[LittleInch]

Even better! But is surface area the only issue. Is the a time or complexity component?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Murali-1311]

It is not for an ITT, for a new job awarded with unit rate contract for welding and painting. Hence I need to submit details for the weld inch dia. and surface area painted to claim my invoice value. So I'm trying to find precise values for the Butt weld fittings.

 

[TugboatEng]

Which is going to cost more? Overbuying by 10% or delaying the project when you don't have enough paint?