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Re: Help with Pressure Vessel Calculations
: Help with Pressure Vessel Calculations -- harold_lim	Post Reply	Top of thread	Engineering Forum

Posted by: harold_lim ® 07/17/2006, 16:30:05 Author Profile eMail author Edit

I actually found a program that can calculate it. www.deepsea(DOT)com/downloads/updos301.exe Modified by Administrator at Mon, Jul 17, 2006, 19:13:21

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Re: Help with Pressure Vessel Calculations
: Help with Pressure Vessel Calculations -- harold_lim	Post Reply	Top of thread	Engineering Forum

Posted by: kelly_bramble ® 12/02/2005, 16:01:49 Author Profile eMail author Edit

The calculator is asking for a maximum allowable stress (S). This is the number which compensates for your SF. For example, if you use SAE 1018 steel, which is rated at approximately 32KSI. If you want a SF of 3:1 then you would use 32,000/3 = 10666.67 for S. Please correlate your calculations. Modified by kelly_bramble at Fri, Dec 02, 2005, 16:02:23

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Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- kelly_bramble	Post Reply	Top of thread	Engineering Forum

Posted by: harold_lim ® 12/02/2005, 16:05:42 Author Profile eMail author Edit

Hi, Thanks for the quick reply. Can you elaborate what (SF) is? I'm new to pressure vessel engineering since my back ground is computer science/engineering.

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: Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- harold_lim	Post Reply	Top of thread	Engineering Forum

Posted by: Rafeal ® 05/28/2009, 20:20:47 Author Profile eMail author Edit

Hi Everyone I need some serious help in Pressure Vessel Calculations. I currently conducting some inspection works on some pressure vessel which have been in service for some years and i cant not get any data on the vessels, like material spec. efficiency etc. What i trying to find out is that, is there any give values in the ASME code for when the Material Spec. and Efficiency is not given.What do i do? Please bear with me i just got API 510 certified a few months ago. and ooooooooo yea if i can get a spreed sheet with calculations for API 510 & 570 works. thanks RAF

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Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- harold_lim	Post Reply	Top of thread	Engineering Forum

Posted by: kelly_bramble ® 12/02/2005, 16:16:39 Author Profile eMail author Edit

SF = Safety Factor, if a material is rated for a yield of 32ksi, it is not a good idea to design such that that stress will occur. So, your safety factor is, in the case of your AUV, piece of mind it will return to you. Modified by kelly_bramble at Fri, Dec 02, 2005, 16:17:33

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Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- kelly_bramble	Post Reply	Top of thread	Engineering Forum

Posted by: harold_lim ® 12/02/2005, 16:28:32 Author Profile eMail author Edit

The Variables in the Calculator are: (P) = Design Pressure (internal) (psi) (R) = Inside radius of shell under consideration (in.) (S) = Maximum Allowable Stress value (psi) (E) Joint Efficiency (80% = .80) If I understand correctly, (S) is the rated maximum allowable stress of the material divide by Safety factor. What I'm not understanding is the calculator is not asking for the depth pressure I'm planning on putting the pressure vessel(AUV) in. I would think that if I want it to go as deep as 1000 feet, compared to let say 50 feet, then I need a thicker shell. The calculator seems to only taking into account the internal pressure and the rated stress of the material used?

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Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- harold_lim	Post Reply	Top of thread	Engineering Forum

Posted by: restrell ® 12/04/2005, 00:31:38 Author Profile eMail author Edit

I have an Excel sheet calculator for pressure vessels which takes into account both internal and external pressure. Write me if youre interested.

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: Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: mathivanan ® 11/09/2009, 02:05:05 Author Profile eMail author Edit

hi sir, i'm new to this webpage. Actually i'm an engineering student doing practical in a palm oil company.I need to calculate the plate thickness for storage tank (SS 304). design temperature is 100°C. the storage tank specification are as below : Height = 9.144 m Diameter, d = 6.7945 m Radius, r = 3.39725 m Formula: V = πr2h = π × 3.397252 × 9.144 = 331.543948 m3 please help me...

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: Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: old dog ® 07/24/2009, 11:01:12 Author Profile eMail author Edit

I know this is a long shot after such a long time since the posting,but I will try anyway. I would be most greatful if you could send me a copy of you spread sheet. Thank you in advance for you kind offer

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: Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: treestump44667 ® 03/09/2009, 16:16:26 Author Profile eMail author Edit

Do you still have that pressure vessel spreadsheet available? I've just discovered your note, and could use some information on checking external pressure tube applications. Thank you. Modified by Administrator at Mon, Mar 09, 2009, 17:51:21

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: Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: Helene p ® 12/10/2008, 19:59:32 Author Profile eMail author Edit

I am interested in the excell sheet calculator ,please send me a copy . THank you

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: Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: Helene p ® 12/10/2008, 19:59:14 Author Profile eMail author Edit

I am interested in the excell sheet calculator ,please send me a copy . THank you

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: Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: czegrati ® 05/08/2008, 18:45:02 Author Profile eMail author Edit

I am interested in the spreadsheet to calculate wall thickness for a pressure vessel. would you please send me a copy?

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Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: rasikkirane ® 11/27/2006, 09:47:45 Author Profile eMail author Edit

Hi ! Please send me the spreadsheet for pressure vessels which takes into account both internal and external pressure. Regards, Rasik

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Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: jack_kang ® 12/20/2005, 15:29:45 Author Profile eMail author Edit

I would be interested in this spreadsheet.

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Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- restrell	Post Reply	Top of thread	Engineering Forum

Posted by: harold_lim ® 12/05/2005, 18:17:23 Author Profile eMail author Edit

yes I am interested please do send it to me =)

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Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- harold_lim	Post Reply	Top of thread	Engineering Forum

Posted by: kelly_bramble ® 12/02/2005, 16:46:48 Author Profile eMail author Edit

Yes, you are right, in fact on second inspection that calculator is not going to help you all. The calculator is for determining the required wall thickness of a pressure vessel subjected to an internal pressure. You are concerned about an external pressure. Looking around Engineers Edge, I do not see any analysis pages that will help you. Don't give up yet, there will be somebody along whom probably knows the equations you need.

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Re: Help with Pressure Vessel Calculations
: Re: Help with Pressure Vessel Calculations -- kelly_bramble	Post Reply	Top of thread	Engineering Forum

Posted by: jack_kang ® 12/20/2005, 15:18:55 Author Profile eMail author Edit

Posted by: restrell ® 12/04/2005, 00:31:38 -------------------------------------------------------------------------------- Author Profile Mail author Edit I have an Excel sheet calculator for pressure vessels which takes into account both internal and external pressure. Write me if youre interested. -------------------------------- I was wondering if I may receive that spreadsheet. I'm having a hard time finding anything useful in calculating crush pressure limits. Please let me know, thanks.

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