[skgarg]

@Shrivalabha…….the Pipe rack is already designed according to the loading I am dividing it into four parts along with piping ,supports cable trays and all.
so i am not so concerned about calculation and theortical part ;my main concern is practical one.
@ Willis …..thanx a ton boss ur feedback are quite impressive.

few other queries:—
In this module concept i would have to do hydrotest twice once at shop and then at site Does ASME permits that?

Do you really think its equivalent that i make four spools and then weld them at site by maintaining proper slope of arnd 3% in pipe
OR by making a long spool at shop having the slope of 3% then cutting it into four parts and again joining them on site

Regards
SG
” Be not afraid of going slowly; be afraid only of standing still”

[skgarg]

@echo …these are very high pressure and high temperature lines so no point even in thinking of flanges code doesn’t allow it.

@willis ….my only concern is interface between two sub modules .n would it be possible to maintain slope in 4 parts
Regards
SG

[skgarg]

Hi
Piping Layout Design : it is nothing but you can say the marriage of different equipments in your plant through Pipes .
connecting Pipes according to process keeping in mind the simple support for these pipes with civil structure available , keeping in mind the accessibility of Valves other equipments , scope of maintenance .
Stress Analysis is nothing but a flexibility analysis the pipe that you have laydown in previous question should be able to withstand the loading ( internal or external) along with that should be flexible enough to allow the thermal expansion so that the loads on connecting equipment nozzle should be below the allowable loads for any equipment.
It is just a Macro Idea ……details includes many more ……….
Regards
SG

[skgarg]

Hi Shri
yup! have few points like cooling of equipments would have to give a serious concern if the ambient conditions are quite hot .
another one is protection from humidity etc( trivial things )
……………..another thing that was bothering me was….NPSH available for pump…
though at this point of time i am not stating that atmospheric pressure will AFFECT or NOT AFFECT the NPSH avbl ….
but that could be a pivotal point in selection ……what is your opinion abt that case…..
Post ur views !!!!
regards
SG

[skgarg]

Thanx Jop
just come to know ..perhaps AWWA ( American Water Works Assosiation ) depicts something over that .

[skgarg]

Hi Jop
how the thickness of GRP pipes are calculated ?
which international code mentions that ?
Regards
SG

[skgarg]

Hi Jop
IBR is Indian Boiler Regulations……governing body in India which looks after the boiler and plant related issues ( safety, inspection etc. in India) ……..for details you can visit this link
http://dipp.nic.in/boilerrules/index.html.
Regards
SG

[skgarg]

@shrivallabha
agreed …..guessing is dangerous …..but these open forums are the best platform for brainstorming ..you give your opinions that help to solve your queries from different point of views and assist to find a better and broad solution for your problem .

@2ndMoment
good one ….so SS has added advantage ( corrosion resistant,cheaper) …then why we are not using SS for main steam line and drains … nobody will mind if they get debris free steam for their turbine ( Blades corrosion ,pitting n all)
…isn’t it …n this is clear that design n operating parameters are all same ….

Regards
SG
“Stumbling is not falling”

[skgarg]

shrivallabha
thanx for quick reply/Try !
you write “when steam condenses it becomes pure water. And that is where SS comes in. You will see that’s the case”
Boss even in the sampling case it will remain in the gas phase only …it has same parameters as of Live steam …thats why the drains of main steam line are of alloy steel……but sampling line are of SS….that is making the selection of material slightly anomalous here………
i guess the variation in material selection is related to size .
but both alloy steel and stainless steel are available as per the code ASME36.10 & ASME36.19 in DN10 size .
Regards
SG

[skgarg]

@11echo
Do you want to say that PWHT depend on the functionality of Pipe ?
is the PWHT is done immediately after the weld ?
Regards
SG

[skgarg]

Thanx Jop
Do you have some documents on Reinforcement calculation.
i am going through code ASME 31.1 for this ………BUT the language and all are arduous.
do have some simple calculations and snaps for this
Regards
SG

[skgarg]

@ 2nd Moment
i have gone through ASME36.10…..but didn’t found anywhere mention of the schedule and thickness relation
Regards
SG

[skgarg]

Hi 2nd Moment
Thanx for the solution …..this is what i wanted .
regards
SG

[skgarg]

Anton
i am not asking for data sheet /spread sheet or tables.
i am looking for the basis of those calculations ,any formula OR
in other words What is the BASIS for these spreadsheet /
Regards
SG

[skgarg]

Hi 2M
Agreed with your answer “YES”
in Case of critical areas like BFP i think they should STRICTLY match.
but couldn’t decipher the meaning of “NO”.
one linked Question Piping material class is decided after Pump selection or prior to that or Parallel?
Regards
SG

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