| 摘要 |
According to the present invention a cathodic protection system for metal piping systems and fittings, therefore, is possible which is easy to install and manufacture. The system for fitting uses a unique sacrificial washer or sacrificial nut installed on the bolts used to fasten the fitting and includes a nonsacrificing portion to maintain the mechanical connection during and after depletion of the sacrificing metal. A unique ring anode is also taught which is secured to the bellmouth of a section of pipe to provide an extension thereof which can be factory or field installed. Preferrably each anode is designed to protect two connected pipe sections or a pipe section and fitting.
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