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EN 10253-4 material properties at high temperature missing

Details
Last Updated: 03 February 2023

Q: It seems that the materials database of PCC does not include the material for Stainless Steel fittings according to EN 10243-4, even though the standard EN 10253-4 is available in the fitting standard for default dimensions. Am I right?

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Weldolet calculation problem

Details
Last Updated: 11 April 2022

Q: during, a class calculation in your PCC software I am getting some errors in the weldolets section. It seems that some dimensions (tn) are missing and the program cannot make the simple-pressure rating calculations.

However, when I tick the option “use without specific ratings in ASME 31.8”, the calculation runs without problem (in this case I assume that the program calculates all the individual parameters). Please note that this problem occurs only in calculation with ASME 31.8 (it is ok with EN1594) for pipe sizes 26”-30” with the specific option “unticked”.

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ASME B31.1 joint efficiency

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Last Updated: 11 April 2022

There is sometimes confusion about the joint efficiency when you compare the ASME B31.1 and the ASME B31.3. The joint efficiency for the ASME B31.1 (2020) are included in the allowable stress values of Table A-1 (US Customary units). Be careful, because some tables are also available is SI or metric units.

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ASME B16.9 fitting wall thickness in ASME B31.3

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Last Updated: 25 January 2021

This article is related to the ASME B16.9 fittings specified in an ASME B31.3 pipe class.

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EN 1092-1 reference thickness vR

Details
Last Updated: 11 April 2022

The PT rating of flanges depends for some material groups on a reference thickness vR. The definition for the vR might be unclear from the EN 1092-1 standard.

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EN 10253 versus EN13480 calculated Tee

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Last Updated: 11 April 2022

Red-Bag receives many questions about the PCC EN13480 Tee calculation versus the later issued EN10253 dimensions standard calculation in for example Annex A.

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Flange rating versus calculation error

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Last Updated: 11 April 2022

"The values for the flanges (service limits) have been entered by using the standard import in the PCC software. However with the calculations I still get an overrun or error. The P and Pmax should be equal at the different temperatures. I get this mistake for all size. Is this due to rounding or what am I doing wrong?"

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Changing dimension of fitting does not affect ASME B31.3 calculation

Details
Last Updated: 11 April 2022

The PCC software has for the ASME B31.X two modes of calculation:

  1. Fitting with a specific rating (default)
  2. Fitting without a specific rating

In the first mode (fitting with a specific rating) the PCC software makes only a calculation of the corresponding pipe with the same schedule as per the ASME code.

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Material P355N, why aren't there any warm values?

Details
Last Updated: 11 April 2022

This has to do with the 'N' at the end ofr P355N. The standard EN10028-3 says:

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How can I register for this site?

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Last Updated: 17 February 2019

The registration is available for Red-Bag customers only.

EN 10253 A/B versus EN 13480 calculations

Details
Last Updated: 11 April 2022

There are many questions related the calculation of the EN10253 A/B fittings. This article handles a few of these questions

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