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The operating condition is fine even though there is liftoff in the pipe. The loads on the supports and nozzle is very high but the pipe is 600A pipe. By low axial stiffness of expansion joint, I meant I cannot use any other expansion joint other than what I have right now. It does not have any...

The pipe stress is slightly higher at ratio of 1.05 times the allowable in sustained case. Since the factor of safety is 3 in B31.3 piping code, is this wrong way to analyze the pipe? Due to constraints in space, it is really difficult to input any supports and the cause is due to low axial...

Thank you everyone for the reply. -15psig seems correct for my situation.

Pressure in pipes during operating condition is full vacuum. How do we input the pressure value for pipe stress analysis? Should it be zero Mpa or we should use atmospheric pressure?

The PU foam used is a high density ones and the thickness of the foam is also fixed for the pipes being used. It is for the colder pipes. This image is from the Japanese manufacturers but because the pipe diameter of Japanese standard and what I want to use is different, it is difficult to find...

Hi, Good day. I'm currently searching for standard dimensions of an insulated pipe support, like U-band support over the polyurethane insulated pipes. But I cannot find it at all. Most of the dimensions I get are from the Japanese manufacturers only, which is not useful to me. I do not know...

Dear everybody, I've been working in a company for more than 2 years as a piping engineer in Japan. My company does EPC works of incineration plants. Most of my works is to do pipe stress analysis. But the incineration plant only has around 12-13 lines. Over the time I have learned how to use...

Thank you very much for the reply. It is of great help for me to understand things about Expansion Joints.

Can anyone explain what is the meaning of tie rod gaps provided by the manufacturers? What happens when there is no gap in either one of forward or backward direction? What happens when there is no gaps at all? If there is no gap, will it help the piping system in reducing axial load? and how...

Thank you everyone very much for the replies. I am a beginner in this field so I do not know exactly what I need to ask but I think I have got the answer that I was looking initially. I currently work in piping used for Waste to Energy Power Plant. Most of the bends were elbows but few were 3D...

Hello Everybody, I want to know the difference between elbows and bends. I have found information like strength, friction, pressure drop, etc of using them but I want to know from manufacturing point of view and cost wise, which one is more economical? If space is not a problem, is using bends...