BIO-INERT PIPELINE AND LIQUID CHROMATOGRAPH

To improve the durability of sealing performance when piped and connected in an end part of a bio-inert pipeline.SOLUTION: A flange 22 is formed in an end part of a bio-inert pipeline by extending an end part of a metal tube 6 with an end part extension member 8 formed of a material harder than a resin tube 4, inserting the resin tube 4 into the inside of the metal tube 6 and the inside of an open hole 16 provided in the end part extension member 8, chamfering an edge 24 of the open hole 16 on a second surface 14 of the end part extension member 8 on the side opposite to the metal tube 6 and folding the end part of the resin tube 4 projecting from the second surface 14 of the end part extension member 8 along a shape obtained by chamfering the edge 24 of the open hole 16.SELECTED DRAWING: Figure 1 【課題】バイオイナート配管の端部における配管接続の際の封止性能の耐久性を向上させる。【解決手段】樹脂チューブ４よりも硬質の材料で構成された端部延長部材８によって金属チューブ６の端部が延長され、樹脂チューブ４は金属チューブ６の内側及び端部延長部材８に設けられた貫通孔１６の内側に挿通され、端部延長部材８の金属チューブ６とは反対側を向く第２面１４における貫通孔１６の縁２４は面取り加工が施され、端部延長部材８の第２面１４から突出した樹脂チューブ４の端部が貫通孔１６の縁２４の面取りされた形状に沿って折り曲げられることで、バイオイナート配管の端部にフランジ部２２が形成されている。【選択図】図１