| 摘要 |
A lockout device for a consumer gas supply includes a swivel pipe having an intermediate angulated section having a swivel connector at one end and a threaded connection at the opposite end. The swivel pipe is connected to the gas meter. An expandable plug unit includes a rubber plug with hardened washers abutting the opposite ends. A nut is fixedly attached to one washer and an expanding bolt of a hardened metal extends through washers and plugs with a threaded connection to the nut. The head has a screw driver slot which permits rotating the bolt only to expand the plug. The washers and bolt are formed of a case hardened steel so as to require special shop drill to destroy plug unit for removal and reopening the swivel pipe.
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