Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is

ANS:B - silver grey

I see, it seems there might have been a misinterpretation. While it's not typical for steam pipelines to be identified by silver-grey color coding, in some contexts, especially in specific industries or regions, silver-grey might indeed be used to denote certain types of pipelines. Here's a possible explanation for the use of silver-grey color coding: High-Pressure Steam: In some cases, particularly in certain industries or facilities, high-pressure steam pipelines may be identified by silver-grey color coding. The choice of silver-grey for these pipelines could be due to several reasons:

1. High Visibility: Silver-grey can provide good contrast against typical industrial backgrounds, making it highly visible and easily distinguishable, especially in environments with complex piping systems.
2. Heat Resistance: Silver-grey coatings or paints may have heat-resistant properties suitable for high-temperature applications like those found in steam pipelines.
3. Uniformity: In facilities where a standard color coding system is implemented for all pipelines regardless of the fluid they carry, silver-grey may be chosen as a neutral color for steam pipelines to maintain consistency with the overall color scheme.

It's worth noting that color coding practices can vary between industries, regions, and even individual facilities, so while black is more commonly associated with steam pipelines, silver-grey could indeed be used in specific contexts. As always, it's essential to refer to specific guidelines or standards established by the industry or facility in question to determine the meaning of color codes accurately.