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Allowable stress of L290

2009-03-25View Original

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It is a socketed tee with a DN250 pipe from L290, connected to a DN100 branch pipe of grade 20#. To calculate the area of the reinforcement ring, it is necessary to know the allowable stress of L290; however, this value cannot be found in Appendix A of GB150-1998. Could someone tell me where I can find it?

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