The influencing factors of Pipe cross internal pressure

　　Pipe cross is indispensable in pressure piping system piping components, but the need for lack of penetration defects of Pipe cross research rarely.

　　Based on the finite element method respectively to calculate the insertion brazing and jumper two Pipe cross the whole circle not port, insert port four-way finite element model of the dimensionless plastic limit internal pressure to a value greater than jumper port four-way value obtained finite element model can be used to replace the former, the latter model in the follow-up work to ensure safety and reduce the workload greatly. Selected the seven parameters, are calculated respectively analyzes each parameter of the whole circle of lack of penetration four-way dimensionless plastic limit the influence of internal pressure. Determine the four-way intensity factor, head diameter ratio and lack of penetration depth of the whole circle of lack of penetration depth of sensitive four-way dimensionless inside the plastic limit pressure of the main influence factors; The former two as the whole circle lack of penetration depth is not sensitive to tee dimensionless plastic limit internal pressure of the main influencing factors.

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