| 摘要 |
In order to attach a fuel system component such as a pipe nipple to a fuel tank (12) having a polyethylene outer layer, the fuel system component (14) is made from a first material which may have desirable characteristics such as resistance to creep, but which may not be easily weldable to the polyethylen e outer layer of the tank. The flange member (18) is used for attachment to th e body portion of the fuel system component by welding and for attachment to t he polyethylene layer of the tank. To inhibit hydrocarbon vapour flow-through through the flange member, the flange member includes a barrier layer (88) which extends from one side of the flange to the other and which surrounds t he central aperture. In another embodiment of the invention, the flange member is made from a material which has the necessary barrier properties. |
