| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the flareless type pipe joint structure which can connect a different outside diameter pipe than a standard pipe, the valve using this, the pipe joint and the freezing unit to the flareless type pipe joint structure for the standard pipe joint of the outside diameter which is defined beforehand as the standard specification. <P>SOLUTION: The flareless type pipe joint structure includes the first joint body 1 which is attached to the connected side equipment, the first coupling member 2 which is screwed to the first joint body 1 and the first ferrule 3 which is pinched between the first joint body 1 and the first coupling member 2. Moreover, the different diameter adjustment part connected to the first joint body 1 at one end and to the different diameter pipe P2 of a different outer diameter d2 than the outer diameter d1 of the standard pipe P1 at the other end is attached to the first joint body 1. Thus, it is so constituted that the different diameter pipe P2 can be connected to the first joint body 1 through the different diameter adjustment part. In addition, the different diameter adjustment part is the diameter change part 5, for example. <P>COPYRIGHT: (C)2009,JPO&INPIT |
