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subroto24chatt
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Join Date: Jan 2012
Posts: 2

Solid Flange Design Calculation

01/07/2012 2:45 AM

I am designing a non standard flange with below duty Conditions & parameters -

1> Flange ID =3300 MM

2> Pressure = 1.5 Kg/Cm2

3> Temperature = 600°Celsius

4> Flange Rating = Class 300

5> Service = Hot Oil

As per the standard calculation ASME the Flange thickness is less.

The equipment is very old & the orignal flange is having thickness = 125 MM , Number of bolt = 112 & Bolt Diameter = M27.

Flange is of Solid Flange with no weld neck design. I am not able in correlating the design calculation & the physical dimension of Flange.

Can anyone tell me the Flange Thickness =? , Bolt PCD = ? Gasketing Seating Area(CAF) = ? , Bolt Diameter =? with farmulae to help me better understand.
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nick name
Guru

Join Date: Mar 2007
Location: City of Light
Posts: 3943
Good Answers: 183
#1

Re: Solid Flange Design Calculation

01/07/2012 5:04 AM

What type of joint ? Gasket ? O-ring ? The bolts position and the flange dimensions are depending on it. The thickness of the part on which the flange is welded is also an important factor since its stiffness plays a role in the required flange stiffness.

Of course for not standard flanges for which all those criteria have been considered already for design.
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subroto24chatt
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Join Date: Jan 2012
Posts: 2
#2
In reply to #1

Re: Solid Flange Design Calculation

01/07/2012 6:22 AM

SPiral Wound Gasket or Compressed Asbestos Gasket
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Anonymous Poster #1
#3

Re: Solid Flange Design Calculation

01/07/2012 8:15 AM

Subaru....

Hot oil at 600 degrees C..??? Really ?

This is hotter than many Main Steam Systems at power plants

What kind of oil is this ??
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nick name
Guru

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Location: City of Light
Posts: 3943
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#4
In reply to #3

Re: Solid Flange Design Calculation

01/07/2012 3:04 PM

You are right to make the remark ! I did not look at the values, at such a temperature oil will be destroyed. The molecules do start to break at over 200°C.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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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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#6
In reply to #4

Re: Solid Flange Design Calculation

01/09/2012 3:40 AM

OK. So is the original posting incorrect? What is the process maximum temperature and pressure?

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Mukesh0861
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Join Date: Dec 2010
Posts: 377
Good Answers: 20
#5

Re: Solid Flange Design Calculation

01/08/2012 11:37 AM

Data given seems some un onable. Flange ID 3300mm hot oil at 600°C at 1.5 kg/cm2 seem impossible with flange class 300.

Some corrections are required from OP side.

Temperature may be in °F, Pressure shall be little higher etc.
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Anonymous Poster (1); Mukesh0861 (1); nick name (2); PWSlack (1); subroto24chatt (1)

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