ASME B31.3 or B31.4 for aqueduct??
ASME B31.3 or B31.4 for aqueduct??
(OP)
Hello dear colleagues, I have a problem that I hope you can help me please. We are designing a pipeline for water running from the head of a river to a facility of an ammonia plant, the length of the pipeline is about 13 km and it’s totally buried, I’m not sure whether to use ASME B31.3 o ASME B31.4. What do you think?? And if it’s necessary to do an stress analysis?? All your comments and help will be greatly appreciated.





RE: ASME B31.3 or B31.4 for aqueduct??
B 31.4 is much better at buried pipeline and will yield a more optimised design.
Unless you have large temperature differences or large bending moments, you can do the simple fully restrained stress analysis in 31.4.
There are many other water specific pipeline codes as well and if you're using something other than welded steel, (e.g. ductile iron, PE etc, you might be better off with whatever the local water authority use.
some idea of size and pressure would help to define it better.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: ASME B31.3 or B31.4 for aqueduct??
In B 31.4, "400.1.2 This Code was not developed to apply to
(a) building service piping, such as water, air, or steam..."
and in B 31.3. "300.1.1 ...(b) This Code applies to piping for all fluids, including:
(1) raw, intermediate, and finished chemicals;
(2) petroleum products;
(3) gas, steam, air, and water..."
What do you think about it?? that's why I'm not sure which one to use, the pipe I'm working on is for transporting water to the ammonia plant
RE: ASME B31.3 or B31.4 for aqueduct??
RE: ASME B31.3 or B31.4 for aqueduct??
It wouldn't be process water until you mix it with your ammonia. Isn't this really just a water pipeline? AWWA is typically used for water pipelines. http://www.awwa.org/publications/manuals-of-practi...
If you don't want AWWA for some reason or other, use B31.4 and take all appropriate additional measures for water.
RE: ASME B31.3 or B31.4 for aqueduct??
you seem to have skipped over the bit in the intro to B 41.4 as noted below which summarise it better than I ever could.
B31.3 Process Piping: piping typically found in petroleum refineries; chemical, pharmaceutical,
textile, paper, semiconductor, and cryogenic plants; and related processing plants
and terminals.
B31.4 Pipeline Transportation Systems for Liquids and Slurries: piping transporting products
that are predominately liquid between facilities, plants, and terminals, and
within terminals, pumping, regulating, and metering stations.
In your section the key words are "building service piping". You are talking about a 13km buried PIPELINE. B 31.4 covers that better than B 31.3, but as noted above by me and others, it (B31.4) is predominantly used in hydrocarbon and chemical service, whereas water, as a low hazard substance, has its own set of codes specific to water only which are even more specific and ultimately more attuned to water pipelines than even B 31.4 - hence cheaper.
You haven't given us:
Diameter of your pipe
Pressure of your pipe
Flow rate of the water
Your planned pipe material (if you already know it)
Where in the world you are building this.
All these will have an impact on which design code is "best" for your application.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: ASME B31.3 or B31.4 for aqueduct??
RE: ASME B31.3 or B31.4 for aqueduct??
BTW 14" is generally regarded as an "odd" size and hence normally not used - 16" would be much better and fittings etc easier to get.
however for Steel lines, B 31.4 is about as good as it gets and is certainly a good start point if nothing else.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: ASME B31.3 or B31.4 for aqueduct??
RE: ASME B31.3 or B31.4 for aqueduct??
RE: ASME B31.3 or B31.4 for aqueduct??
If he wants to pay more money for the same product then fine, his money, his choice.
Stress analysis of buried lines is much better described by 31.4. 31,3 is a very good PIPING code, 31.4 is a decent PIPELINE code.
If you don't have a big temperature change then stress shouldn't be an issue.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: ASME B31.3 or B31.4 for aqueduct??
RE: ASME B31.3 or B31.4 for aqueduct??