Hello All,
I'd like to confirm details of hot reaction force(ASME B31.1 119.10). I understand that we can use the equation 119.10 eq(18) and eq(19) for hot reactions and cold reactions. Also we can calculate hot reaction force by using hot elastic modulus in CAESAR2. And code require the cold modulus to be used in stress calculations. In my view we use the hot modulus with high temperature pipework, when equipment loads or restraint reactions are required and NOT stresses.
Q1. When we need to calculate reactions with high temperature pipe analysis, Could we possibly use the hot elastic modulus option at any restraint? Is there a more specific reference or process about applying hot reactions?
Q2. Basically hot reactions is calculated based on cold elastic modulus and hot elastic modulus ratio. By the way I'd like to inquire about restraint near by turbine nozzle. Pipe line is preheated about 100 celcius for a long time and then rise high temperature. In this case I just same cold elastic modulus and hot elastic modulus ratio. But I was thinking that material property(elastic modulus) will be changed for preheating. I'm wondering if it is correct method or not.
I have very short analysis experience. I hope you give me the advice. If possible, I would like to know and discuss this topic
Thank u for your interest and help.
Edited by KimTaeSung (12/27/15 11:29 PM)
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Best Regards,
TS