What is the color code for this pipe in industrial piping?

The pipe shown in the image is yellow.

In industrial settings, specific colors are used to identify the contents of pipes for safety and operational purposes.

• Yellow is commonly used to indicate pipes carrying flammable materials, such as flammable gases or liquids.
• Green is typically used for water.
• Blue is often used for compressed air.
• Red is used for fire protection systems.

• A) Flammable Gas: This aligns with the standard industrial color code for yellow pipes.
• B) Water: Water pipes are typically colored green or blue, not yellow.

Therefore, a yellow pipe in industrial piping signifies flammable gas.

The final answer is $\boxed{\text{A}}$