mechanical properties to calculate pipe thickness with EN13480 code

[energeng]

Hello,

I am trying to calculate the pipe thinkness with the european code EN13480-3, but I don´t now where to find the mechanical properties required to determinate the tension for thickness calculation . It is concerning the values Rp0,2 , Rp1,0 , Rp0,2t , Rp1,0t , Rm and Rmt showed in the code.
Could anyone help to find this values for the different materials at different tempeturares?
Are there some list similar like provided in the ASME B31.3 with mechanical properties for european steels for pipes?

Thanks in advance.

 

[Mechh007]

What is your material grade?

 

[energeng]

The grades are:

Carbon Steel RSt37.2 1.0432 (A-105)
Austenitic Stainless Steel 1.4306 (304L)

 

[C2it]

If you are having to work to that awful Code, you need to get all your material properties approved by your NoBo.

Oh joy.

 

[XL83NL]

Why is that C2it? The EN 13480, albeit an awful code, is a harmonized standard, from what I remember.
Compliance to the code usually means being compliant with PED 97/23/EC (although there are some exceptions written in the code).

What has the NoBo have to do with material approval? Isnt it the other way around, i.e. using B31.3 requires PMA under PED 97/23EC?

On topic: I have very little experience on 13480. Attached pdf/table may help you though.
Other than that, I couldnt find any clear information in any of the 6 relevant 13480 parts, nor in any of the standards listed in attached pdf.

 

[prex]

The EuroNorms listed in the attachment to XL83NL's post provide all the required quantities.

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[XL83NL]

prex, do you know which standard lists temperature dependant stress values (i.e. Rp0.2, Rp1.0, Rm)?
The standards I referenced only show mechanical properties at room temperature, see attached pdf for an example taken from EN 10253-3.
What if you if you require values at say 250 deg C for SS316?

 

[C2it]

XL83NL,

I last used EN13480 in a major nuclear AGR upgrade. Some requirements may have been client driven but as I recall, all the usual ASTM type material grades had to be approved. Worse than that, re-approved for the next station, albeit the same client.

The EN13480 Code itself is a hotch-potch of otherwise good European and other Codes, mostly US based. As those Codes have had, it too needs 20 years of sorting. We just have to be thankful that none of the committee responsible seems to have been familiar with IGE TD/12.

 

[DSB123]

C2it,
You are correct. Any American or for that matter any "foreign" (i.e. not European) materials need to be approved by the NoBo for use. For the material properties you have to buy each material standard to get the info. It's a little way of getting more money out of the Companies as they have to buy a bucket load of standards in order to be able to apply EN 13480. As you say it is a nightmare to use and there are many errors/inconsistencies in there at the moment.

 

[XL83NL]

C2it, that's the same as I said before, albeit implicitly. I mightve been more clear by saying ASTM materials under 13480 require PMA's.
However, PMA's are almost always required under PED 97/23/EC, as most people use ASTM materials. Exception is SEP piping.

Now, as I pointed out before, what possibilities are there to use EN standards for materials?
Or is the best way to go just by using ASTM materials and ASME components (B16.5/B16.9/etc)?

 

[prex]

XL83NL, the EN standard you referenced is not the right one, as it is not listed in the table you provided. The EN standards in the table should have all the relevant properties (Rp1(t) and Rm(t) only for austenitics), but of course I don't know all of them.

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[XL83NL]

prex, EN 10253-3 I referenced doesnt have other mechanical properties (as a variable of temperature) in it which allow you to do e.g. wall thickness calcs at different temperatures.
EN 10253-3 is referenced in 13480.

if there's any other standard that does have this info, please tell me, as thats the key thing the OP (and I) seem to be after.

 

[prex]

Sorry, but EN 10253-3 is not in table D.1.1 . EN 10028-2 to 7, EN 10273, EN 10253-2 and 4, EN 10222-2 to 5, EN 10269 do have that information, as do, I think, all others referenced in D.1.1 (except room temperature grades of course).

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[XL83NL]

Youre right, pardon. I was meaning to refer to EN 10253-4, which is referenced too in 13480-2.
For 10253-4 (which is in table D-1.1), the same applies, i.e. there are no stress values at a function of T.

10222-2 does list stress values, but they're for forgings. EN 1092-1 would cover my p,T-ratings for that part.

How is pressure design for fittings (tee's, eblows, etc) covered in 13480 for SS?

ps; what are the options in 13480 if you need to design to temperatures which go beyond the highest listed stress value?

 

[prex]

Yes, you are right: EN 10253-4 does not give directly the elevated temperature properties, as it references the relevant standard for the material from which the fittings are fabricated (tube, forging, bar).
However this is special for fittings. Standards for plates, forgings, tubes, fasteners do contain tabulated values for elevated temperature properties.

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