Oval Degree Change of Elbow in Main Steam Pipe

Life of elbow have been effective with oval degree of elbow in main steam pipe,oval degree c hange of elbow have been with action time of internal pressure and standing ou ter moment.Oval degree of elbow is a function of action time of internal pre ssure.When standing outer moment is opening,oval degree of elbow will reduce ,when standing outer moment is closing,oval degree of elbow will increase,o val degree will increase while standing onter moment increases.