What is a combination blind and spacer formed from one piece of metal that frequently becomes a permanent line component?

A spectacle blind is a type of device used in piping systems that consists of a solid piece of metal with two different configurations: one side has a blind flange and the other has an opening. This design allows for quick installation and removal, while providing a secure and permanent means to isolate sections of piping. Frequently, these spectacle blinds are made from a single piece of metal, ensuring structural integrity and reducing the risk of leaks or failures.

The role of a spectacle blind is especially crucial in confined space situations and industrial applications, where safety is a top priority. By isolating parts of a system, they prevent the accidental flow of hazardous materials or the introduction of pressure during maintenance or rescue operations, which is critical for ensuring the safety of personnel in potentially dangerous environments.

In contrast, the other options pertain to different components or functions within piping systems. Coupling bodies are used to connect two sections of pipe, safety connectors refer to devices ensuring secure connections that can withstand pressure, and end stops are designed to seal the end of a pipe. However, they do not embody the dual functionality of blocking flow and providing an opening that characterizes the spectacle blind.