The maximum operating pressure of a gas pipeline is called _______.

The maximum operating pressure of a gas pipeline is referred to as maximum allowable operating pressure, commonly abbreviated as MAOP. This term is essential in the pipeline industry because it defines the highest pressure that a pipeline can safely operate under without compromising integrity or posing safety hazards.

Understanding MAOP is crucial for pipeline design, construction, and maintenance. It is determined by a combination of factors such as the pipeline material, wall thickness, intended use, and regulatory guidelines. This value helps in preventing unexpected and potentially dangerous failures due to excessive pressure.

In contrast, while MOP (maximum operating pressure) is sometimes used interchangeably in casual discussions, it doesn’t carry the same regulatory and safety connotation that MAOP does. "Sure pressure" is not a recognized term in the industry related to pressure limits of pipelines, and "compression" refers to a different concept related to the process of compressing gas for transportation rather than a pressure term. The specificity and regulatory relevance of MAOP make it the correct choice in this context.