| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of components, improve the workability of piping, and lessen possible gas leakage parts by connecting a gas consumption piping and a gas supply piping to gas meter joints through an L-shaped pipe and two components of joint. SOLUTION: A ball valve 51 is connected to an L-shaped pipe 42 coupled with a gas meter joint through an L-shaped pipe 10 and joints 20, 30. This reduces the number of components and eases connection works of screwing, etc. The joints 20, 30 can be formed by molds and the pipe 10 has only one bend, this facilitating forming components and suppressing the cost low. The joint 30 is composed of a gas entrance 31 integrated with a gas outlet 32 through a coupling 33 to result in that the piping 10 of the gas inlet system is unified with a piping 64 of the gas outlet system, this providing a structure strong against external forces to avoid damaging a gas meter 40 and increase the stability of the meter 40.
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