| 摘要 |
PURPOSE: A double-layered nipple for a pipe is provided to maintain high intensity and durability and to reduce weight and material costs by dually constituting a nipple. CONSTITUTION: A double-layered nipple for a pipe is located between a first and a second pipe and connects a first and a second pipe. The double-layered nipple for a pipe comprises an inner nipple(110) and an outer nipple(120). The inner nipple has one complete nipple form. The outer nipple serves as an outer shell of the inner nipple. The outer nipple is combined in the outer side surface of the inner nipple. The outer nipple is made of high intensity and durability material but the inner nipple is made of soft material.
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