ポリエチレン製造用超高圧圧力容器のLBB条件の検討 I  材料特性と内圧疲労試験結果

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  • Study on LBB criterion of high pressure reactors for polyethylene production. 1st report Material behavior and results of internal pressure fatigue test.
  • ポリエチレン セイゾウヨウ チョウコウアツ アツリョク ヨウキ ノ LBB ジ

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Fracture toughness and fatigue crack growth rate behavior were investigated using six materiels with different toughness which were taken out of a tubular type reactor and heat treated at different tempering temperatures. Repeated internal pressure tests were conducted using actual size cylinders where the fracture toughness of materials ranged from 67 to 144 MPa √(m). Test results suggest that actual reactors satisfy the leak before break (LBB) condition because of their higher fracture toughness.

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