Importance

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Abstract

Method and apparatus, in the form a kit of parts, for securing and restraining the threaded brass adapter bushing of a standard pressure tester in its threaded engagement within the riser of a tapping tee on a gas main during pressure testing of the main, to prevent blow-off of the bushing. The assembled parts provide a swivel plate having respective connection rod apertures at its opposite ends and mounted loosely via an enlarged central aperture on the nipple of the tester immediately adjacent to the adapter bushing which is threaded onto, and holds the swivel plate on the nipple; an elongated angular saddle plate placed against the gas main below the tapping tee and having diagonally disposed connection rod apertures corresponding to those in the swivel plate; and a pair of threaded connection rods passed through the respective corresponding pairs of apertures and tightly connecting the swivel plate and saddle plate. The angular positioned swivel plate and diagonal disposition of the saddle plate apertures causes the rods to bypass the horizontal branch of the tapping tee. The swivel plate is pressed into engagement with the tester bushing, thereby preventing blowoff. In an alternative embodiment, a wire rope is substituted for the pair of connection rods.

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First Claim