help !!! pipe spacing

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16 years 10 months ago - 16 years 10 months ago #4012 by 11echo
Replied by 11echo on topic I have to agree with
I have to agree with EliutBB, pipe spacing can be client driven. I had submitted a pipe spacing table to this site a few weeks ago( STILL don't see it yet Anton!!?? *G*). But this is a "worst case situation" where you’re fighting for every inch. I normally work in the oil fields, where space in normally not a problem, and I'd take my chart and routinely add an inch to every value. I also work very closely with the construction people, and designing piping systems that are unnecessarily "tight" only complicates their work. That I feel is one aspect of piping design, you can design to please the engineers, but if you can please both engineering & construction ...you've earned your pay! ...My $0.02 anyway. ...Mark

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16 years 8 months ago - 16 years 8 months ago #4085 by Anonymous
Replied by Anonymous on topic thermal considerations
Steam headers and other hot lines tend to grow quite a bit over long distances in pipe racks due to thermal expansion so it might be helpful to take thermal expansion of adjacent lines into account when dealing with pipe spacing.

I generally use the rules of thumb as outlined by JOP and then calc thermal growth from directional anchors (or stops) as the lines "grow" into changes of direction (pipe rack turns) and allow a little more spacing as required.

great job on moderating this forum James!

Mikal

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16 years 8 months ago - 16 years 8 months ago #4086 by Jop
Replied by Jop on topic Pipe Spacing
Mikal,
You are quite right about the extra allowance for thermal growth at changes in direction.
Thanks for pointing it out.

Do it once and Do it Right

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16 years 1 month ago - 16 years 1 month ago #4534 by juan1977
Replied by juan1977 on topic you can design to please
you can design to please the engineers, ... by 11echo.

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my take. Ive always taught that design is always about compliance, like complying to meet the Code and Specs or ensuring that the requirement related to SHE are meet or that the design was economically sound.

Pleasing the engineers ... i dont know but doesnt sound a good design practice. In if youre working in a hazardous environment, can be fatal.

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16 years 1 month ago - 16 years 1 month ago #4536 by 11echo
Replied by 11echo on topic juan1977 ...Not sure where you
juan1977 ...Not sure where you are from, but EVERY project I was on was headed by an Engineer(s). The goal of a designer is to take an engineering concept and turn it into real world design, capable of being constructed by people in the field. What I was trying to say is that a "designer" lives between these two worlds, and IF you can produce something that both worlds (Engineering and Construction) likes, I'd say you've done your job! ...I agree with you that if you only producing a design that only one side like is it rarely considered a good design.

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16 years 1 month ago - 16 years 1 month ago #4538 by juan1977
Replied by juan1977 on topic you can design to please
you can design to please the engineers

The goal of a designer is to take an engineering concept and turn it into real world design, capable of being constructed by people in the field.

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The above 2 statements are not the same. The intent of design is to ensure compliance to the requirement of the project specification and NOT to please the engineers. Pleasing the engineers is NOT the same as taking an engineering concept and turning it into real world design.

As to question of where im coming from? as a license professional engineers ive been involved in several mega-projects (costing over a billion US dollars but limited to refineries, power plant and petrochemicals) built and design by Bechtel, FD, etc in different continents for over 30 years - so the answer is from the hot desert of the arabian peninsula all the way to emerging exotic asian countries . Basically my involvement is related to code (the ASME and API and several OSHA CFR)compliance analysis/evaluation. im also cert to the bones.

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