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I found in the EN13480, it should be PGA * 1,5

It's general question. Code EN 13480. Seismic code whatever you want. It should be correct with engineering point of view. I think it will be better assume PGA. Peak ground spectral acceleration will be too far... in general, static equivalent is a big simplification

If I want to take into account 'static earthquake' for piping system and peak ground acceleration = 0,3g, what value should I take for the calculation? PGA=0,3g or Peak ground spectral acceleration = approx. 0,3g x 2,5 = 0,75g ? (skipping soil type and importance factor). In the first case...

"with a strongly fixed support there that is probably all you need, but please, it is your responsibility to verify." I checked in book Pipe Stress Engineering by Peng, but there is no clear answer.

Thank you. What if I have fix support? Reaction force F1 = F2 ??? ax1e: Thak you. I published this post at the same time as you.

this picture better explains my question:

I'm asking about the standard approach in stress analysis software like autopipe, ceasar

Please look at the picture. Is it necessary to assume any other force from opening the safety valve? I've seen some people add force directly at the outlet of the safety valve.

How do you evaluate this type of service / business? Do you think that companies are willing to cooperate with external engineer or does everyone have their own stress engineer and it is not good business?

1. XL83NL: Do you have experience in the Tee type A acc. to EN10253 in Autopipe? It should be modeled as "unreinforced"? What about type B or ASME elbows? DO you model nominal thickness eg. 219x8mm or the real one? The real thickness of tee 219x8mm is 19,4mm and 14,5mm! 2. Pennpiper: For...

It depends of the software, for example modeling different thickness of reducer in Autopipe it's quite complicated and time consuming. Impact on the result - negligible.

If you are doing a pipeline model in a stress analysis software and for example the pipe is 219 x 5mm, but the elbows and tees are 219 x 6mm. Do you model/calculate with different thicknesses for each elements or model the pipeline of the same thickness 5mm for pipe and elbows/tees.

Great. Don't you have any problems with import? AutoPIPE recognize all the pipes properly?

What is yours experience with export pipelines from PDMS and import to piping stress analysis software? Does it work good and efficiently? Do you prefer to enter the pipeline yourself (from isometric) for calculations?

Thank you. Do you think there is a chance to start business before visit the US? Finding a company willing to cooperate remotely isn't easy, but it can be a good deal for them, engineering calculations can be performed remotely without loss of quality.

"Not sure what you mean by saying everybody can be a professional engineer; surely there's a license/certification for qualified personnel to stamp/approve designs?" The profession of mechanical engineer is completely open, there are no licenses, permissions, certifications etc.

What formal qualifications are needed to be a piping stress engineer in US? I'm from Europe and there are no restrictions here, everybody can be a proffesional engineer (of course, the market verifies the real ones with knowledge and experience). I'm planning to founded a small design office...

Is it possible to calculate a nozzle with double fillet weld (without full penetration) by Nozzle Pro? I have a problem with it.

Please advice. I have a question regarding to the EN 13445-3 chapter 17 - simplified assessment of fatigue life. In the table 17-1 we have Maximum permisable pressure Pmax. and we should count this value for each element acc. to the formulas from EN 13445-3. We need this value to calculate...