As living standards significantly improve, natural gas, as a new energy and fuel source, is widely used in daily life, greatly facilitating people's lives. However, natural gas has its own unique characteristics: it is explosive, toxic, and highly flammable. Moreover, the difficulty in regulating natural gas increases, and the maintenance and management of its equipment are challenging. Additionally, the safety factor of natural gas is low, and there is a high risk when managers conduct inspections. Any issues with natural gas equipment can lead to extremely serious consequences.

Due to the public nature of gas, it possesses characteristics such as pressure, flammability, explosiveness, and toxicity, making the emphasis on safe production absolutely necessary. This specification proposes that urban gas engineering design meet the requirements of safe production, ensuring supply, rational gas usage, and environmental protection. The Code for Construction and Acceptance of Indoor Gas Pipeline Projects in Urban Areas has been implemented as of August 1, 2003. The main contents include: General Provisions, Installation of Indoor Gas Pipelines, Installation of Gas Meters, Installation of Gas Equipment, Inspection, Testing, and Acceptance of Indoor Gas Pipelines and Gas-consuming Equipment.

Reliability-centered maintenance evaluates failures in the following order of importance: (1) Potential Failures: These have no direct impact on the equipment currently but can have severe consequences once they occur. (2) Safety Failures: These can cause immediate harm to physical or life safety. For example, in the case of liquefied petroleum gas tanks or wet gas screw gas holders, a leak poses a significant danger, threatening human and life safety. We categorize corrosion and leakage of liquefied petroleum gas tanks and gas holders as safety failures. (3) Operational Failures: These affect production operations and the direct costs of repair. Failures of Roots blowers in various gas source stations (transmitting mine gas to city gas storage tanks), regional pressure reduction stations, and regulators are classified as operational failures. (4) Non-Operational Failures: These typically do not affect production operations but do impact repair costs. Examples include machine tool failures in the machine repair shop, deep well pumps, and standby diesel generators.