Question

What are the advantages of using a spectacle blind rather than a blind?

1) A spectacle blind provides the option to inspect or clean the pipeline without removing the blind.
2) A spectacle blind allows for easy isolation of the pipeline by rotating the spectacle plate.
3) A spectacle blind is more cost-effective than a blind.
4) A spectacle blind is easier to install and remove compared to a blind.

Answer 1

A spectacle blind offers the convenience of easy isolation through rotation and is typically easier to install and remove than standard blinds, streamlining pipeline maintenance operations.

Step-by-step explanation:

The student's question relates to the advantages of using a spectacle blind in a pipeline system compared to using a standard blind. A spectacle blind, which is named because it resembles a pair of glasses, is a safety device used to isolate a section of the pipeline for maintenance or shutdown. It consists of two plates: one solid and one with a hole in the center, attached together. The question seems to confuse the use of spectacle blinds, which are employed in pipeline systems, with optical devices. However, answering the question in the context of pipeline engineering:

• A spectacle blind allows for easy isolation of the pipeline by rotating the spectacle plate.
• It is easier to install and remove compared to a standard blind.

The referenced information about the use of contact lenses over glasses is related to optometry and vision correction, which is not directly relevant to spectacle blinds in engineering contexts.