| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a steel pipe set which dispenses with a welding operation on a job site, can be easily and firmly connected without being affected by the weather, and comprises two or more steel pipes capable of being inexpensively manufactured. <P>SOLUTION: A steel pipe set S1 includes a first steel pipe P1 which has a first screwing member 3 welded to an edge of an upper end of a steel pipe body 2, and a second steel pipe P2 which has a second screwing member 8 welded to an edge of a lower end of the steel pipe body 2. The first screwing member 3, which is formed in a flat cylindrical shape from cast steel, has a thread groove 7 provided on an inner peripheral surface. The second screwing member 8, which is formed in a flat cylindrical shape from cast steel, has an outer peripheral surface provided with a thread 14 for being screwed into the thread groove 7. <P>COPYRIGHT: (C)2013,JPO&INPIT |
