| 摘要 |
An improved gas meter riser assembly that is constructed in a manner that allows all welding to be carried out prior to application of protective coating thereby to maintain uniform epoxy cover. The invention consists of an outer riser pipe having a nipple welded thereon, which nipple is swaged to define a lower neck for insertion within the riser pipe. After welding and coating the nipple/pipe riser casing, an interior plastic pipe having an adaptor insert is fed downward through riser pipe until the adaptor insert is sealingly force-fit down within the swaged lower neck of the nipple. Selected spacers are provided between the plastic pipe and the pipe riser, and the lower end of the pipe riser may be suitably capped through a protective moisture seal.
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