| 摘要 |
<p>PROBLEM TO BE SOLVED: To protrude a fusion part from a barrel even when the fusion part is not protruded unless it is increased in size more than necessary, and arrange an indicator at a position in which internal pressure at a fusion interface is sufficiently indicated, in a electric fusion saddle joint comprising: a saddle part; the barrel projected on the saddle part; a spigot projected to a side from the barrel; and the indicator rising by the pressure of resin at the fusion interface at fusing. SOLUTION: A mat 6 in which heating wires 5 are spirally embedded is deviated in the pipe axial direction to an extent in which the heating wire at an inner peripheral side is not protruded inside a hole 9 of the barrel 2, a part which is farthest from the center of the hole is protruded from the barrel 2, and the indicator 7 is arranged on the protruded part.</p> |
