Recent content by Garlik

Thanks CoryPad. I knew that... and I also know about values of 200.000 hours according a VdTÜV. But what happens with the embrittelment of the material after a long exposure at this high temperatures? If there is a load cycle, bolts might break, right? What materials are used for bolting at high...

Hi all, Has anyone experience with bolting material X6NiCrTiMoVB25-15-2 (austenitic)? This is used for tightening pressure boundary parts of a valve. Up to which temperature is possible to use this material and for how long? I am afraid about the possibility of having intergranular corrosion...

Hello, The standards AD2000 and TRD421 talk about the discharge coefficent αw. The standard EN 4126-5 talks about the discharge coefficient Kd and the de-rated discharge coefficient Kdr. And Kdr=0.9*Kd The standards ASME VIII and API RP 520 talk about the discharge coefficient Kd. αw and Kdr...

Hello. Is it acceptable if I have a valve designed according to EN 12516-2 and the pressure boundary parts are made of ASTM/ASME materials? If I have welds among these pressure boundary parts, the Welding plans and procedures should be according to EN or ASTM/ASME standards? The NDTs of these...

Thanks for your reply. The problem is that I don't have any experience with FATT. FATT is only used in low temperatures? Can we perform it at 100°C for example or more? And then, which procedure/standard should I use instead the ASME code? Which EN talks about the procedure? Sorry for these...

Yes, I have reviewed this Standard. The problem I have with it is that the material I am talking about does not apply in the exceptions of subsection NC-2311. And according to what the supplier tells me, it is not possible to determine a temperature for FATT with this material. Is for that...

Hello. I need to define a procedure to perform the FATT test for the material X20CrMoV11-1. In theory this procedure will be based in the standards A370 and ASME Section III NC2300. I know that we need to perform some tests up to different temperatures to define a curve. What I don't know is...

Hello. The scope of this standard is for "highly stressed components". Where is the limit? When can I know if one material is higly stressed or not? When do I need to apply the standard 12680-1 (for general purposes) or 12680-2 (highly stressed components)? thanks and regards.

Yes, I also have the same version of the standard but the problem is that you can find different values in different pages. For example: - Page 25: you can find +QT800, but the value of tensile strength is 850-1000 MPa. (Should start at 800 MPa instead of 850??). - Page 31: You can find +QT850...

Hello, I have a doubt about the material X46Cr13 and its standard EN 10088-3. If you check the standard 10088-3, you will see in some pages that you can perform +QT800 to the material X46Cr13. In other pages it is written +QT850 instead of +QT800. Do you know what is valid? Tha values of...

Do you know, where I can find a good example for ANSYS of plasticity model for pressure vessels? Thanks to all.

I should have to make a non-linear study (plasticity) of one shaft with ANSYS. This shaft is put under torsion stresses. I have to study its damage and its limit. Which type of study you recommend to me?

And also, can you link me to datasheet and info about these kinds of coating please? Thanks!

Do you know any website where I can find welding properties of materials? (for example, min. and max. welding temperature of 316L, or A-105/N, and many other materials and properties..) Thanks and regards,

What do you thing about phenolic coatings and PTFE coatings? Are they good solutions for high temperature and corrosion services? Thanks and regards.