Non Standard Blind Flange (Fabricated from Plate)

[Yasir Bhatti]

Dear Experts,

I am need of your help , i have got blind flange fabricated from plate selection chart from this forum but difficult to prove to client can you please give me code reference or derived formula.

Your Earliest Response is highly appreciated.

Thanks and Regards,

Yasir

[rudolf saldanha]

hi, the attached file was contributed by one of the members, Check it out.But am afraid, there is no reference to any code as such.

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From: Yasir Bhatti <meloy...@gmail.com>
To: material...@googlegroups.com
Sent: Saturday, 13 April 2013, 23:19
Subject: [MW:17365] Non Standard Blind Flange (Fabricated from Plate)

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[Arunachalam A]

http://cr4.globalspec.com/thread/21301/How-to-calculate-Blind-flange-thickness

On 13 April 2013 22:03, Arunachalam A <arun...@gmail.com> wrote:

You can refer ASME Section VIII Div 1- UG 34 for calculating blind thickness.

arun

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Arunachalam.A,

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Arunachalam.A,

[Arunachalam A]

You can refer ASME Section VIII Div 1- UG 34 for calculating blind thickness.

arun

On 13 April 2013 19:19, Yasir Bhatti <meloy...@gmail.com> wrote:

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Arunachalam.A,

[Yane]

SPACER & BLIND Thickness Calculation for Internal Pressure (ASME B 31.3)

SPACER & BLIND  Thickness Calculation  for Internal Pressure (ASME B 31.3)

******************************************************************

Step1: Select the Spacer & Blind Material

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Step2: List Down

      Ø  Pipe Outside Diameter, (mm) = D

   Ø  Internal Design Pressure,(Kg/cm²) = P   

   Ø  Design Temperature, (C°) = T

For the material under consideration.

--------------------------------------------------------------------------------------------------------

Step 3: List down

Ø  Allowable Stress, (Kg/cm²)  = S

ASME B 31.3 @ Design Temperature.  (TABLE A-1)

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Step 4: Select

Ø  Joint Efficiency factor = E             (TABLE A-1A)

ASME B 31.3  (TABLE-1A)

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Step 5: Select

Ø  Corrosion Allowance, (mm) = c

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Step 6: Formula @ ASME B 31.3 

                                 3*P

tm   =    dg * √  (--------------)     +  c

                              16*S*E

tm= Calculated thickness including corrosion Allowance, (mm).

dg = Inside Dia. of gasket for RF/FF flanges or gasket pitch dia. for RTJ flanges, (mm).

--------------------------------------------------------------------------------------------------------

Step 7: Compare thickness

If      t > tm

t = Thickness as per API 590

Then selected thickness of Spacer & Blind is OK,

Else revise the thickness.

Custom Flanges Manufacturer

在 2013年4月13日星期六 UTC+8下午11:19:37，Yass3r写道：