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sasan330
Participant

Join Date: Apr 2012
Posts: 3

Pipe Wall Thickness Calculated For PMS

04/04/2012 5:11 AM

Hi Friends,

At present, we have flare line in a project with following table design condition:

Pipe
Size
inch

D mm

th mm

Material

T
°C

P
kPa

SE
kPa

y

521321.09.53A358-304L-196\2001,100115,1430.4

Our PMS selection classes for this line indicate thickness about 17.48 mm but calculation by ASME B31.3 has 9.53 mm thickness for this line, our service is cryogenic,

Calculate:

tm=1100*1321+0 mm
2(115143+1100*0.4)
tm=6.29 mm
T=tm+0.125 tm
T=7.076 mm
WALL THICKNESS= 9.53 mm

I think wall thickness calculation by ASME B31.3, cannot base for PMS and that will be minimum pressure design and we must be considered weight load of pipe and ….

Please if experience or exact information source you have, discuss here…

Thank you,
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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#1

Re: Pipe wall thickness calculated for PMS

04/04/2012 6:38 AM

PMS?

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sasan330
Participant

Join Date: Apr 2012
Posts: 3
#2
In reply to #1

Re: Pipe wall thickness calculated for PMS

04/04/2012 6:41 AM

Dear SolarEagle,

PMS is Piping Material specification,
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PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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Good Answers: 839
#3
In reply to #2

Re: Pipe wall thickness calculated for PMS

04/04/2012 10:26 AM

Thanks for clearing that up.

http://www.acronymfinder.com/PMS.html

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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#4

Re: Pipe Wall Thickness Calculated For PMS

04/04/2012 6:29 PM

Well I'm just guessing here but 9.55 looks like standard rating, 17.48 looks like maybe schd 80 or thereabouts....You could have calculations on two different materials for your pipe...One more expensive lighter stronger alloy, and one heavier weaker cheaper steel....Why not check with the design engineer and see....

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jackchen
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Join Date: Nov 2010
Posts: 39
#5
In reply to #4

Re: Pipe Wall Thickness Calculated For PMS

04/15/2012 8:39 PM

Spam: This post was deleted because it contained advertising outside the Commercial Space forum. Please review Section 14 of the CR4 Site FAQ about advertising.
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