What does code section B31.4 cover?

The correct answer is that code section B31.4 addresses liquid transportation piping. This section specifically focuses on the requirements and standards to be followed when designing, constructing, and maintaining piping systems that transport liquids. This includes a range of fluids, such as water, oil, and chemicals, ensuring that safety, environmental protection, and performance criteria are all met.

Understanding the scope of B31.4 is crucial for professionals working with liquid transportation systems, as it provides the guidelines for preventing leaks, managing pressure, and ensuring the integrity of the piping. This knowledge is essential for complying with regulations and ensuring public safety.

The other options pertain to different types of piping systems, each governed by its own respective code sections, which outline the unique requirements and considerations for those particular applications. For example, gas transmission and distribution falls under a different section, while process piping and building service piping are also distinct categories, each with specific codes addressing their safety and operational standards.