< Topic > As junction and the removal of the tube and the tube are made easy, welding do in the joint while maintaining the strength which is equal to welding, cheapness, at the same time, it is something which designates that the satisfactory tube of quality is offered as topic of the settlement.SolutionsBeing the tube branching the branching tube perpendicularly lap from side of the tube itself, the burring tube which consists by the fact that lap on side of the tube itself it provides the hole for the female screw in the branching cylinder which is provided with burring processing the spiral shellfish it adjusts the male screw for the tube of the female screw and the tube itself of the tube itself and the branching tube. In that case it is desirable for the aforementioned female screw to be the taper female screw for the tube. In case of the mataso, it lays out the ball where on internal cartridge head of the tube, rim the lower part (internal cartridge head of the tube) directs the aforementioned burring tube and, does conical trapezoidal shape, putting the plate which provides the volt/bolt which is interposed from the aperture of the tube outside the opening, the pushing burring it is processed the aforementioned plate to volt/bolt direction facing outside by the fact that it overpowers.< Choice figure >Drawing 1【課題】管と管の接合及び取り外しを容易にするとともに接合部において溶接をせずに溶接と同等の強度を保ちつつ、安価、かつ、品質の良好な管を提供することを解決の課題とするものである。【解決手段】管本体の周側から分岐管を直角に分岐させた管であって、管本体の周側にバーリング加工によって設けた分岐円筒に雌ネジ用の穴を設け、管本体の雌ネジと管本体と分岐管の管用雄ネジとを螺合することで構成されるバーリング管。その場合前記雌ネジが管用テーパ雌ネジであることが好ましい。またその場合、前記バーリング管は、管の内部底部に、外周が下方(管の内部底部)に向け円錐台形状をした玉を配置し、管の開口から挿入したボルトを開口部の外側に設けたプレートをはさんで、前記プレートをボルト方向外向きに押圧することでバーリング加工される。【選択図】図1
