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En13480-3 Reinforcement Pad Calc

05/31/2017 1:38 AM

Hello,

I was doing the branch tee reinforcement calculation according to en13480-3 section 8.4.3.

I have a query regarding equation 8.4.3-4 ( lpl <= ls).

I calculated the ls term according to equation 8.4.1-2.

which is coming around 190 mm. According to above equation I can use the reinforcement pad width less than ls means less than 190 mm.

If I use this width, it is not satisfy the final equation 8.4.3-6.

can you pls clarify if code restrict the use of reinforcement pad width less than ls how we can satisfy the final equation without increasing the pad width and also reinforcement pad width is also limited to eas.

if require I can send you my calculation.

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#1

Re: En13480-3 reinforcement pad calc

05/31/2017 4:32 AM

You may be able to increase the thickness.

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#4
In reply to #1

Re: En13480-3 reinforcement pad calc

05/31/2017 8:15 AM

Hi Tornado,

we can not increase the run pipe wall thickness because the run pipe thickness is selected according to pipe thick calculation.

However thickness of pad is also limited to run pipe wall thickness. Which we have selected maximum as per 8.4.3-5.

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#5
In reply to #4

Re: En13480-3 reinforcement pad calc

05/31/2017 10:02 AM

What is the diameter of the branch?

I don't know what your piping code says, but for ASME vessels, pad thickness can be 1.5 x shell thickness (not sure if that is up to date).

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#6
In reply to #5

Re: En13480-3 reinforcement pad calc

05/31/2017 10:13 AM

Hi Tornado,

Header outer dia- 2832 mm.

header nominal thickness- 16 mm.

Branch outer dia- 2032 mm.

branch nominal thickness- 12 mm.

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#10
In reply to #4

Re: En13480-3 reinforcement pad calc

06/20/2017 6:30 AM

That is not correct. Of course you can increase the run pipe thickness, though there may be other ways to solve the problem. Why is the pad thickness limited to the run pipe thickness? Are you sure about that?

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#11
In reply to #10

Re: En13480-3 reinforcement pad calc

06/21/2017 6:47 AM

Increase the thickness of the run pipe is not a good solution always due to unavailability of the material.

As per EN13480 8.4.3-5 plate thickness should be equal or less than the run pipe thickness. eapl<=eas.

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#2

Re: En13480-3 reinforcement pad calc

05/31/2017 5:23 AM

What's wrong with 190mm?

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#3
In reply to #2

Re: En13480-3 reinforcement pad calc

05/31/2017 8:03 AM

If I use it 190 mm. My total force is coming 672656 N according to equation 8.4.3-6. Which should be min pcxAp=1098340 N.

please refer my attached calculation sheet point no 4.

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#7
In reply to #3

Re: En13480-3 reinforcement pad calc

05/31/2017 12:32 PM

Nope. No attachment.

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#8
In reply to #7

Re: En13480-3 reinforcement pad calc

05/31/2017 3:22 PM

Hi PWSlack,

Please download the calculation PDF file uploaded at below path.

https://sabercathost.com/4Uuv/Terna_Reinforcement_pad_Calculation30052017.pdf

https://sabercathost.com/4Uuu/EN13480-3-Page-82.pdf

Kindly revert if you have any problem in download.

Regards

sumit

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#9

Re: En13480-3 Reinforcement Pad Calc

06/20/2017 3:34 AM

Hi PWSlack & Tornado,

I am waiting for your comments.

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